merge

50 files changed, 3945 insertions, 721 deletions

diff --git a/src/core/census/context.c b/src/core/census/context.c
index cab58b653c..e60330de64 100644
--- a/src/core/census/context.c
+++ b/src/core/census/context.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,16 +31,500 @@
  *
  */
 
-#include "src/core/census/context.h"
-
-#include <string.h>
 #include <grpc/census.h>
 #include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/port_platform.h>
+#include <grpc/support/useful.h>
+#include <stdbool.h>
+#include <string.h>
+#include "src/core/support/string.h"
+
+// Functions in this file support the public context API, including
+// encoding/decoding as part of context propagation across RPC's. The overall
+// requirements (in approximate priority order) for the
+// context representation:
+// 1. Efficient conversion to/from wire format
+// 2. Minimal bytes used on-wire
+// 3. Efficient context creation
+// 4. Efficient lookup of tag value for a key
+// 5. Efficient iteration over tags
+// 6. Minimal memory footprint
+//
+// Notes on tradeoffs/decisions:
+// * tag includes 1 byte length of key, as well as nil-terminating byte. These
+//   are to aid in efficient parsing and the ability to directly return key
+//   strings. This is more important than saving a single byte/tag on the wire.
+// * The wire encoding uses only single byte values. This eliminates the need
+//   to handle endian-ness conversions. It also means there is a hard upper
+//   limit of 255 for both CENSUS_MAX_TAG_KV_LEN and CENSUS_MAX_PROPAGATED_TAGS.
+// * Keep all tag information (keys/values/flags) in a single memory buffer,
+//   that can be directly copied to the wire.
+// * Binary tags share the same structure as, but are encoded separately from,
+//   non-binary tags. This is primarily because non-binary tags are far more
+//   likely to be repeated across multiple RPC calls, so are more efficiently
+//   cached and compressed in any metadata schemes.
+
+// Structure representing a set of tags. Essentially a count of number of tags
+// present, and pointer to a chunk of memory that contains the per-tag details.
+struct tag_set {
+  int ntags;        // number of tags.
+  int ntags_alloc;  // ntags + number of deleted tags (total number of tags
+  // in all of kvm). This will always be == ntags, except during the process
+  // of building a new tag set.
+  size_t kvm_size;  // number of bytes allocated for key/value storage.
+  size_t kvm_used;  // number of bytes of used key/value memory
+  char *kvm;        // key/value memory. Consists of repeated entries of:
+  //   Offset  Size  Description
+  //     0      1    Key length, including trailing 0. (K)
+  //     1      1    Value length. (V)
+  //     2      1    Flags
+  //     3      K    Key bytes
+  //     3 + K  V    Value bytes
+  //
+  // We refer to the first 3 entries as the 'tag header'. If extra values are
+  // introduced in the header, you will need to modify the TAG_HEADER_SIZE
+  // constant, the raw_tag structure (and everything that uses it) and the
+  // encode/decode functions appropriately.
+};
+
+// Number of bytes in tag header.
+#define TAG_HEADER_SIZE 3  // key length (1) + value length (1) + flags (1)
+// Offsets to tag header entries.
+#define KEY_LEN_OFFSET 0
+#define VALUE_LEN_OFFSET 1
+#define FLAG_OFFSET 2
+
+// raw_tag represents the raw-storage form of a tag in the kvm of a tag_set.
+struct raw_tag {
+  uint8_t key_len;
+  uint8_t value_len;
+  uint8_t flags;
+  char *key;
+  char *value;
+};
+
+// Use a reserved flag bit for indication of deleted tag.
+#define CENSUS_TAG_DELETED CENSUS_TAG_RESERVED
+#define CENSUS_TAG_IS_DELETED(flags) (flags & CENSUS_TAG_DELETED)
+
+// Primary (external) representation of a context. Composed of 3 underlying
+// tag_set structs, one for each of the binary/printable propagated tags, and
+// one for everything else. This is to efficiently support tag
+// encoding/decoding.
+struct census_context {
+  struct tag_set tags[3];
+  census_context_status status;
+};
+
+// Indices into the tags member of census_context
+#define PROPAGATED_TAGS 0
+#define PROPAGATED_BINARY_TAGS 1
+#define LOCAL_TAGS 2
+
+// Extract a raw tag given a pointer (raw) to the tag header. Allow for some
+// extra bytes in the tag header (see encode/decode functions for usage: this
+// allows for future expansion of the tag header).
+static char *decode_tag(struct raw_tag *tag, char *header, int offset) {
+  tag->key_len = (uint8_t)(*header++);
+  tag->value_len = (uint8_t)(*header++);
+  tag->flags = (uint8_t)(*header++);
+  header += offset;
+  tag->key = header;
+  header += tag->key_len;
+  tag->value = header;
+  return header + tag->value_len;
+}
 
-/* Placeholder implementation only. */
+// Make a copy (in 'to') of an existing tag_set.
+static void tag_set_copy(struct tag_set *to, const struct tag_set *from) {
+  memcpy(to, from, sizeof(struct tag_set));
+  to->kvm = gpr_malloc(to->kvm_size);
+  memcpy(to->kvm, from->kvm, from->kvm_used);
+}
+
+// Delete a tag from a tag_set, if it exists (returns true if it did).
+static bool tag_set_delete_tag(struct tag_set *tags, const char *key,
+                               size_t key_len) {
+  char *kvp = tags->kvm;
+  for (int i = 0; i < tags->ntags_alloc; i++) {
+    uint8_t *flags = (uint8_t *)(kvp + FLAG_OFFSET);
+    struct raw_tag tag;
+    kvp = decode_tag(&tag, kvp, 0);
+    if (CENSUS_TAG_IS_DELETED(tag.flags)) continue;
+    if ((key_len == tag.key_len) && (memcmp(key, tag.key, key_len) == 0)) {
+      *flags |= CENSUS_TAG_DELETED;
+      tags->ntags--;
+      return true;
+    }
+  }
+  return false;
+}
+
+// Delete a tag from a context, return true if it existed.
+static bool context_delete_tag(census_context *context, const census_tag *tag,
+                               size_t key_len) {
+  return (
+      tag_set_delete_tag(&context->tags[LOCAL_TAGS], tag->key, key_len) ||
+      tag_set_delete_tag(&context->tags[PROPAGATED_TAGS], tag->key, key_len) ||
+      tag_set_delete_tag(&context->tags[PROPAGATED_BINARY_TAGS], tag->key,
+                         key_len));
+}
+
+// Add a tag to a tag_set. Return true on success, false if the tag could
+// not be added because of constraints on tag set size. This function should
+// not be called if the tag may already exist (in a non-deleted state) in
+// the tag_set, as that would result in two tags with the same key.
+static bool tag_set_add_tag(struct tag_set *tags, const census_tag *tag,
+                            size_t key_len) {
+  if (tags->ntags == CENSUS_MAX_PROPAGATED_TAGS) {
+    return false;
+  }
+  const size_t tag_size = key_len + tag->value_len + TAG_HEADER_SIZE;
+  if (tags->kvm_used + tag_size > tags->kvm_size) {
+    // allocate new memory if needed
+    tags->kvm_size += 2 * CENSUS_MAX_TAG_KV_LEN + TAG_HEADER_SIZE;
+    char *new_kvm = gpr_malloc(tags->kvm_size);
+    memcpy(new_kvm, tags->kvm, tags->kvm_used);
+    gpr_free(tags->kvm);
+    tags->kvm = new_kvm;
+  }
+  char *kvp = tags->kvm + tags->kvm_used;
+  *kvp++ = (char)key_len;
+  *kvp++ = (char)tag->value_len;
+  // ensure reserved flags are not used.
+  *kvp++ = (char)(tag->flags & (CENSUS_TAG_PROPAGATE | CENSUS_TAG_STATS |
+                                CENSUS_TAG_BINARY));
+  memcpy(kvp, tag->key, key_len);
+  kvp += key_len;
+  memcpy(kvp, tag->value, tag->value_len);
+  tags->kvm_used += tag_size;
+  tags->ntags++;
+  tags->ntags_alloc++;
+  return true;
+}
+
+// Add/modify/delete a tag to/in a context. Caller must validate that tag key
+// etc. are valid.
+static void context_modify_tag(census_context *context, const census_tag *tag,
+                               size_t key_len) {
+  // First delete the tag if it is already present.
+  bool deleted = context_delete_tag(context, tag, key_len);
+  // Determine if we need to add it back.
+  bool call_add = tag->value != NULL && tag->value_len != 0;
+  bool added = false;
+  if (call_add) {
+    if (CENSUS_TAG_IS_PROPAGATED(tag->flags)) {
+      if (CENSUS_TAG_IS_BINARY(tag->flags)) {
+        added = tag_set_add_tag(&context->tags[PROPAGATED_BINARY_TAGS], tag,
+                                key_len);
+      } else {
+        added = tag_set_add_tag(&context->tags[PROPAGATED_TAGS], tag, key_len);
+      }
+    } else {
+      added = tag_set_add_tag(&context->tags[LOCAL_TAGS], tag, key_len);
+    }
+  }
+  if (deleted) {
+    if (call_add) {
+      context->status.n_modified_tags++;
+    } else {
+      context->status.n_deleted_tags++;
+    }
+  } else {
+    if (added) {
+      context->status.n_added_tags++;
+    } else {
+      context->status.n_ignored_tags++;
+    }
+  }
+}
+
+// Remove memory used for deleted tags from a tag set. Basic algorithm:
+// 1) Walk through tag set to find first deleted tag. Record where it is.
+// 2) Find the next not-deleted tag. Copy all of kvm from there to the end
+//    "over" the deleted tags
+// 3) repeat #1 and #2 until we have seen all tags
+// 4) if we are still looking for a not-deleted tag, then all the end portion
+//    of the kvm is deleted. Just reduce the used amount of memory by the
+//    appropriate amount.
+static void tag_set_flatten(struct tag_set *tags) {
+  if (tags->ntags == tags->ntags_alloc) return;
+  bool found_deleted = false;  // found a deleted tag.
+  char *kvp = tags->kvm;
+  char *dbase = NULL;  // record location of deleted tag
+  for (int i = 0; i < tags->ntags_alloc; i++) {
+    struct raw_tag tag;
+    char *next_kvp = decode_tag(&tag, kvp, 0);
+    if (found_deleted) {
+      if (!CENSUS_TAG_IS_DELETED(tag.flags)) {
+        ptrdiff_t reduce = kvp - dbase;  // #bytes in deleted tags
+        GPR_ASSERT(reduce > 0);
+        ptrdiff_t copy_size = tags->kvm + tags->kvm_used - kvp;
+        GPR_ASSERT(copy_size > 0);
+        memmove(dbase, kvp, (size_t)copy_size);
+        tags->kvm_used -= (size_t)reduce;
+        next_kvp -= reduce;
+        found_deleted = false;
+      }
+    } else {
+      if (CENSUS_TAG_IS_DELETED(tag.flags)) {
+        dbase = kvp;
+        found_deleted = true;
+      }
+    }
+    kvp = next_kvp;
+  }
+  if (found_deleted) {
+    GPR_ASSERT(dbase > tags->kvm);
+    tags->kvm_used = (size_t)(dbase - tags->kvm);
+  }
+  tags->ntags_alloc = tags->ntags;
+}
 
-size_t census_context_serialize(const census_context *context, char *buffer,
-                                size_t buf_size) {
-  /* TODO(aveitch): implement serialization */
+census_context *census_context_create(const census_context *base,
+                                      const census_tag *tags, int ntags,
+                                      census_context_status const **status) {
+  census_context *context = gpr_malloc(sizeof(census_context));
+  // If we are given a base, copy it into our new tag set. Otherwise set it
+  // to zero/NULL everything.
+  if (base == NULL) {
+    memset(context, 0, sizeof(census_context));
+  } else {
+    tag_set_copy(&context->tags[PROPAGATED_TAGS], &base->tags[PROPAGATED_TAGS]);
+    tag_set_copy(&context->tags[PROPAGATED_BINARY_TAGS],
+                 &base->tags[PROPAGATED_BINARY_TAGS]);
+    tag_set_copy(&context->tags[LOCAL_TAGS], &base->tags[LOCAL_TAGS]);
+    memset(&context->status, 0, sizeof(context->status));
+  }
+  // Walk over the additional tags and, for those that aren't invalid, modify
+  // the context to add/replace/delete as required.
+  for (int i = 0; i < ntags; i++) {
+    const census_tag *tag = &tags[i];
+    size_t key_len = strlen(tag->key) + 1;
+    // ignore the tag if it is too long/short.
+    if (key_len != 1 && key_len <= CENSUS_MAX_TAG_KV_LEN &&
+        tag->value_len <= CENSUS_MAX_TAG_KV_LEN) {
+      context_modify_tag(context, tag, key_len);
+    } else {
+      context->status.n_invalid_tags++;
+    }
+  }
+  // Remove any deleted tags, update status if needed, and return.
+  tag_set_flatten(&context->tags[PROPAGATED_TAGS]);
+  tag_set_flatten(&context->tags[PROPAGATED_BINARY_TAGS]);
+  tag_set_flatten(&context->tags[LOCAL_TAGS]);
+  context->status.n_propagated_tags = context->tags[PROPAGATED_TAGS].ntags;
+  context->status.n_propagated_binary_tags =
+      context->tags[PROPAGATED_BINARY_TAGS].ntags;
+  context->status.n_local_tags = context->tags[LOCAL_TAGS].ntags;
+  if (status) {
+    *status = &context->status;
+  }
+  return context;
+}
+
+const census_context_status *census_context_get_status(
+    const census_context *context) {
+  return &context->status;
+}
+
+void census_context_destroy(census_context *context) {
+  gpr_free(context->tags[PROPAGATED_TAGS].kvm);
+  gpr_free(context->tags[PROPAGATED_BINARY_TAGS].kvm);
+  gpr_free(context->tags[LOCAL_TAGS].kvm);
+  gpr_free(context);
+}
+
+void census_context_initialize_iterator(const census_context *context,
+                                        census_context_iterator *iterator) {
+  iterator->context = context;
+  iterator->index = 0;
+  if (context->tags[PROPAGATED_TAGS].ntags != 0) {
+    iterator->base = PROPAGATED_TAGS;
+    iterator->kvm = context->tags[PROPAGATED_TAGS].kvm;
+  } else if (context->tags[PROPAGATED_BINARY_TAGS].ntags != 0) {
+    iterator->base = PROPAGATED_BINARY_TAGS;
+    iterator->kvm = context->tags[PROPAGATED_BINARY_TAGS].kvm;
+  } else if (context->tags[LOCAL_TAGS].ntags != 0) {
+    iterator->base = LOCAL_TAGS;
+    iterator->kvm = context->tags[LOCAL_TAGS].kvm;
+  } else {
+    iterator->base = -1;
+  }
+}
+
+int census_context_next_tag(census_context_iterator *iterator,
+                            census_tag *tag) {
+  if (iterator->base < 0) {
+    return 0;
+  }
+  struct raw_tag raw;
+  iterator->kvm = decode_tag(&raw, iterator->kvm, 0);
+  tag->key = raw.key;
+  tag->value = raw.value;
+  tag->value_len = raw.value_len;
+  tag->flags = raw.flags;
+  if (++iterator->index == iterator->context->tags[iterator->base].ntags) {
+    do {
+      if (iterator->base == LOCAL_TAGS) {
+        iterator->base = -1;
+        return 1;
+      }
+    } while (iterator->context->tags[++iterator->base].ntags == 0);
+    iterator->index = 0;
+    iterator->kvm = iterator->context->tags[iterator->base].kvm;
+  }
+  return 1;
+}
+
+// Find a tag in a tag_set by key. Return true if found, false otherwise.
+static bool tag_set_get_tag(const struct tag_set *tags, const char *key,
+                            size_t key_len, census_tag *tag) {
+  char *kvp = tags->kvm;
+  for (int i = 0; i < tags->ntags; i++) {
+    struct raw_tag raw;
+    kvp = decode_tag(&raw, kvp, 0);
+    if (key_len == raw.key_len && memcmp(raw.key, key, key_len) == 0) {
+      tag->key = raw.key;
+      tag->value = raw.value;
+      tag->value_len = raw.value_len;
+      tag->flags = raw.flags;
+      return true;
+    }
+  }
+  return false;
+}
+
+int census_context_get_tag(const census_context *context, const char *key,
+                           census_tag *tag) {
+  size_t key_len = strlen(key) + 1;
+  if (key_len == 1) {
+    return 0;
+  }
+  if (tag_set_get_tag(&context->tags[PROPAGATED_TAGS], key, key_len, tag) ||
+      tag_set_get_tag(&context->tags[PROPAGATED_BINARY_TAGS], key, key_len,
+                      tag) ||
+      tag_set_get_tag(&context->tags[LOCAL_TAGS], key, key_len, tag)) {
+    return 1;
+  }
   return 0;
 }
+
+// Context encoding and decoding functions.
+//
+// Wire format for tag_set's on the wire:
+//
+// First, a tag set header:
+//
+// offset   bytes  description
+//   0        1    version number
+//   1        1    number of bytes in this header. This allows for future
+//                 expansion.
+//   2        1    number of bytes in each tag header.
+//   3        1    ntags value from tag set.
+//
+//   This is followed by the key/value memory from struct tag_set.
+
+#define ENCODED_VERSION 0      // Version number
+#define ENCODED_HEADER_SIZE 4  // size of tag set header
+
+// Encode a tag set. Returns 0 if buffer is too small.
+static size_t tag_set_encode(const struct tag_set *tags, char *buffer,
+                             size_t buf_size) {
+  if (buf_size < ENCODED_HEADER_SIZE + tags->kvm_used) {
+    return 0;
+  }
+  buf_size -= ENCODED_HEADER_SIZE;
+  *buffer++ = (char)ENCODED_VERSION;
+  *buffer++ = (char)ENCODED_HEADER_SIZE;
+  *buffer++ = (char)TAG_HEADER_SIZE;
+  *buffer++ = (char)tags->ntags;
+  if (tags->ntags == 0) {
+    return ENCODED_HEADER_SIZE;
+  }
+  memcpy(buffer, tags->kvm, tags->kvm_used);
+  return ENCODED_HEADER_SIZE + tags->kvm_used;
+}
+
+char *census_context_encode(const census_context *context, char *buffer,
+                            size_t buf_size, size_t *print_buf_size,
+                            size_t *bin_buf_size) {
+  *print_buf_size =
+      tag_set_encode(&context->tags[PROPAGATED_TAGS], buffer, buf_size);
+  if (*print_buf_size == 0) {
+    return NULL;
+  }
+  char *b_buffer = buffer + *print_buf_size;
+  *bin_buf_size = tag_set_encode(&context->tags[PROPAGATED_BINARY_TAGS],
+                                 b_buffer, buf_size - *print_buf_size);
+  if (*bin_buf_size == 0) {
+    return NULL;
+  }
+  return b_buffer;
+}
+
+// Decode a tag set.
+static void tag_set_decode(struct tag_set *tags, const char *buffer,
+                           size_t size) {
+  uint8_t version = (uint8_t)(*buffer++);
+  uint8_t header_size = (uint8_t)(*buffer++);
+  uint8_t tag_header_size = (uint8_t)(*buffer++);
+  tags->ntags = tags->ntags_alloc = (int)(*buffer++);
+  if (tags->ntags == 0) {
+    tags->ntags_alloc = 0;
+    tags->kvm_size = 0;
+    tags->kvm_used = 0;
+    tags->kvm = NULL;
+    return;
+  }
+  if (header_size != ENCODED_HEADER_SIZE) {
+    GPR_ASSERT(version != ENCODED_VERSION);
+    GPR_ASSERT(ENCODED_HEADER_SIZE < header_size);
+    buffer += (header_size - ENCODED_HEADER_SIZE);
+  }
+  tags->kvm_used = size - header_size;
+  tags->kvm_size = tags->kvm_used + CENSUS_MAX_TAG_KV_LEN;
+  tags->kvm = gpr_malloc(tags->kvm_size);
+  if (tag_header_size != TAG_HEADER_SIZE) {
+    // something new in the tag information. I don't understand it, so
+    // don't copy it over.
+    GPR_ASSERT(version != ENCODED_VERSION);
+    GPR_ASSERT(tag_header_size > TAG_HEADER_SIZE);
+    char *kvp = tags->kvm;
+    for (int i = 0; i < tags->ntags; i++) {
+      memcpy(kvp, buffer, TAG_HEADER_SIZE);
+      kvp += header_size;
+      struct raw_tag raw;
+      buffer =
+          decode_tag(&raw, (char *)buffer, tag_header_size - TAG_HEADER_SIZE);
+      memcpy(kvp, raw.key, (size_t)raw.key_len + raw.value_len);
+      kvp += raw.key_len + raw.value_len;
+    }
+  } else {
+    memcpy(tags->kvm, buffer, tags->kvm_used);
+  }
+}
+
+census_context *census_context_decode(const char *buffer, size_t size,
+                                      const char *bin_buffer, size_t bin_size) {
+  census_context *context = gpr_malloc(sizeof(census_context));
+  memset(&context->tags[LOCAL_TAGS], 0, sizeof(struct tag_set));
+  if (buffer == NULL) {
+    memset(&context->tags[PROPAGATED_TAGS], 0, sizeof(struct tag_set));
+  } else {
+    tag_set_decode(&context->tags[PROPAGATED_TAGS], buffer, size);
+  }
+  if (bin_buffer == NULL) {
+    memset(&context->tags[PROPAGATED_BINARY_TAGS], 0, sizeof(struct tag_set));
+  } else {
+    tag_set_decode(&context->tags[PROPAGATED_BINARY_TAGS], bin_buffer,
+                   bin_size);
+  }
+  memset(&context->status, 0, sizeof(context->status));
+  context->status.n_propagated_tags = context->tags[PROPAGATED_TAGS].ntags;
+  context->status.n_propagated_binary_tags =
+      context->tags[PROPAGATED_BINARY_TAGS].ntags;
+  // TODO(aveitch): check that BINARY flag is correct for each type.
+  return context;
+}
diff --git a/src/core/census/placeholders.c b/src/core/census/placeholders.c
index 5829cc9460..fe23d13971 100644
--- a/src/core/census/placeholders.c
+++ b/src/core/census/placeholders.c
@@ -37,11 +37,6 @@
 
 /* Placeholders for the pending APIs */
 
-census_tag_set *census_context_tag_set(census_context *context) {
-  (void)context;
-  abort();
-}
-
 int census_get_trace_record(census_trace_record *trace_record) {
   (void)trace_record;
   abort();
@@ -73,7 +68,7 @@ const census_aggregation *census_view_aggregrations(const census_view *view) {
   abort();
 }
 
-census_view *census_view_create(uint32_t metric_id, const census_tag_set *tags,
+census_view *census_view_create(uint32_t metric_id, const census_context *tags,
                                 const census_aggregation *aggregations,
                                 size_t naggregations) {
   (void)metric_id;
@@ -83,7 +78,7 @@ census_view *census_view_create(uint32_t metric_id, const census_tag_set *tags,
   abort();
 }
 
-const census_tag_set *census_view_tags(const census_view *view) {
+const census_context *census_view_tags(const census_view *view) {
   (void)view;
   abort();
 }
diff --git a/src/core/census/tag_set.c b/src/core/census/tag_set.c
deleted file mode 100644
index 9b65a1dfa1..0000000000
--- a/src/core/census/tag_set.c
+++ /dev/null
@@ -1,535 +0,0 @@
-/*
- *
- * Copyright 2015-2016, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <grpc/census.h>
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/port_platform.h>
-#include <grpc/support/useful.h>
-#include <stdbool.h>
-#include <string.h>
-#include "src/core/support/string.h"
-
-// Functions in this file support the public tag_set API, as well as
-// encoding/decoding tag_sets as part of context propagation across
-// RPC's. The overall requirements (in approximate priority order) for the
-// tag_set representations:
-// 1. Efficient conversion to/from wire format
-// 2. Minimal bytes used on-wire
-// 3. Efficient tag set creation
-// 4. Efficient lookup of value for a key
-// 5. Efficient lookup of value for an index (to support iteration)
-// 6. Minimal memory footprint
-//
-// Notes on tradeoffs/decisions:
-// * tag includes 1 byte length of key, as well as nil-terminating byte. These
-//   are to aid in efficient parsing and the ability to directly return key
-//   strings. This is more important than saving a single byte/tag on the wire.
-// * The wire encoding uses only single byte values. This eliminates the need
-//   to handle endian-ness conversions. It also means there is a hard upper
-//   limit of 255 for both CENSUS_MAX_TAG_KV_LEN and CENSUS_MAX_PROPAGATED_TAGS.
-// * Keep all tag information (keys/values/flags) in a single memory buffer,
-//   that can be directly copied to the wire.14
-// * Binary tags share the same structure as, but are encoded separately from,
-//   non-binary tags. This is primarily because non-binary tags are far more
-//   likely to be repeated across multiple RPC calls, so are more efficiently
-//   cached and compressed in any metadata schemes.
-// * all lengths etc. are restricted to one byte. This eliminates endian
-//   issues.
-
-// Structure representing a set of tags. Essentially a count of number of tags
-// present, and pointer to a chunk of memory that contains the per-tag details.
-struct tag_set {
-  int ntags;        // number of tags.
-  int ntags_alloc;  // ntags + number of deleted tags (total number of tags
-  // in all of kvm). This will always be == ntags, except during the process
-  // of building a new tag set.
-  size_t kvm_size;  // number of bytes allocated for key/value storage.
-  size_t kvm_used;  // number of bytes of used key/value memory
-  char *kvm;        // key/value memory. Consists of repeated entries of:
-  //   Offset  Size  Description
-  //     0      1    Key length, including trailing 0. (K)
-  //     1      1    Value length. (V)
-  //     2      1    Flags
-  //     3      K    Key bytes
-  //     3 + K  V    Value bytes
-  //
-  // We refer to the first 3 entries as the 'tag header'. If extra values are
-  // introduced in the header, you will need to modify the TAG_HEADER_SIZE
-  // constant, the raw_tag structure (and everything that uses it) and the
-  // encode/decode functions appropriately.
-};
-
-// Number of bytes in tag header.
-#define TAG_HEADER_SIZE 3  // key length (1) + value length (1) + flags (1)
-// Offsets to tag header entries.
-#define KEY_LEN_OFFSET 0
-#define VALUE_LEN_OFFSET 1
-#define FLAG_OFFSET 2
-
-// raw_tag represents the raw-storage form of a tag in the kvm of a tag_set.
-struct raw_tag {
-  uint8_t key_len;
-  uint8_t value_len;
-  uint8_t flags;
-  char *key;
-  char *value;
-};
-
-// Use a reserved flag bit for indication of deleted tag.
-#define CENSUS_TAG_DELETED CENSUS_TAG_RESERVED
-#define CENSUS_TAG_IS_DELETED(flags) (flags & CENSUS_TAG_DELETED)
-
-// Primary (external) representation of a tag set. Composed of 3 underlying
-// tag_set structs, one for each of the binary/printable propagated tags, and
-// one for everything else. This is to efficiently support tag
-// encoding/decoding.
-struct census_tag_set {
-  struct tag_set tags[3];
-  census_tag_set_create_status status;
-};
-
-// Indices into the tags member of census_tag_set
-#define PROPAGATED_TAGS 0
-#define PROPAGATED_BINARY_TAGS 1
-#define LOCAL_TAGS 2
-
-// Extract a raw tag given a pointer (raw) to the tag header. Allow for some
-// extra bytes in the tag header (see encode/decode functions for usage: this
-// allows for future expansion of the tag header).
-static char *decode_tag(struct raw_tag *tag, char *header, int offset) {
-  tag->key_len = (uint8_t)(*header++);
-  tag->value_len = (uint8_t)(*header++);
-  tag->flags = (uint8_t)(*header++);
-  header += offset;
-  tag->key = header;
-  header += tag->key_len;
-  tag->value = header;
-  return header + tag->value_len;
-}
-
-// Make a copy (in 'to') of an existing tag_set.
-static void tag_set_copy(struct tag_set *to, const struct tag_set *from) {
-  memcpy(to, from, sizeof(struct tag_set));
-  to->kvm = gpr_malloc(to->kvm_size);
-  memcpy(to->kvm, from->kvm, from->kvm_used);
-}
-
-// Delete a tag from a tag_set, if it exists (returns true if it did).
-static bool tag_set_delete_tag(struct tag_set *tags, const char *key,
-                               size_t key_len) {
-  char *kvp = tags->kvm;
-  for (int i = 0; i < tags->ntags_alloc; i++) {
-    uint8_t *flags = (uint8_t *)(kvp + FLAG_OFFSET);
-    struct raw_tag tag;
-    kvp = decode_tag(&tag, kvp, 0);
-    if (CENSUS_TAG_IS_DELETED(tag.flags)) continue;
-    if ((key_len == tag.key_len) && (memcmp(key, tag.key, key_len) == 0)) {
-      *flags |= CENSUS_TAG_DELETED;
-      tags->ntags--;
-      return true;
-    }
-  }
-  return false;
-}
-
-// Delete a tag from a census_tag_set, return true if it existed.
-static bool cts_delete_tag(census_tag_set *tags, const census_tag *tag,
-                           size_t key_len) {
-  return (tag_set_delete_tag(&tags->tags[LOCAL_TAGS], tag->key, key_len) ||
-          tag_set_delete_tag(&tags->tags[PROPAGATED_TAGS], tag->key, key_len) ||
-          tag_set_delete_tag(&tags->tags[PROPAGATED_BINARY_TAGS], tag->key,
-                             key_len));
-}
-
-// Add a tag to a tag_set. Return true on sucess, false if the tag could
-// not be added because of constraints on tag set size. This function should
-// not be called if the tag may already exist (in a non-deleted state) in
-// the tag_set, as that would result in two tags with the same key.
-static bool tag_set_add_tag(struct tag_set *tags, const census_tag *tag,
-                            size_t key_len) {
-  if (tags->ntags == CENSUS_MAX_PROPAGATED_TAGS) {
-    return false;
-  }
-  const size_t tag_size = key_len + tag->value_len + TAG_HEADER_SIZE;
-  if (tags->kvm_used + tag_size > tags->kvm_size) {
-    // allocate new memory if needed
-    tags->kvm_size += 2 * CENSUS_MAX_TAG_KV_LEN + TAG_HEADER_SIZE;
-    char *new_kvm = gpr_malloc(tags->kvm_size);
-    memcpy(new_kvm, tags->kvm, tags->kvm_used);
-    gpr_free(tags->kvm);
-    tags->kvm = new_kvm;
-  }
-  char *kvp = tags->kvm + tags->kvm_used;
-  *kvp++ = (char)key_len;
-  *kvp++ = (char)tag->value_len;
-  // ensure reserved flags are not used.
-  *kvp++ = (char)(tag->flags & (CENSUS_TAG_PROPAGATE | CENSUS_TAG_STATS |
-                                CENSUS_TAG_BINARY));
-  memcpy(kvp, tag->key, key_len);
-  kvp += key_len;
-  memcpy(kvp, tag->value, tag->value_len);
-  tags->kvm_used += tag_size;
-  tags->ntags++;
-  tags->ntags_alloc++;
-  return true;
-}
-
-// Add/modify/delete a tag to/in a census_tag_set. Caller must validate that
-// tag key etc. are valid.
-static void cts_modify_tag(census_tag_set *tags, const census_tag *tag,
-                           size_t key_len) {
-  // First delete the tag if it is already present.
-  bool deleted = cts_delete_tag(tags, tag, key_len);
-  // Determine if we need to add it back.
-  bool call_add = tag->value != NULL && tag->value_len != 0;
-  bool added = false;
-  if (call_add) {
-    if (CENSUS_TAG_IS_PROPAGATED(tag->flags)) {
-      if (CENSUS_TAG_IS_BINARY(tag->flags)) {
-        added =
-            tag_set_add_tag(&tags->tags[PROPAGATED_BINARY_TAGS], tag, key_len);
-      } else {
-        added = tag_set_add_tag(&tags->tags[PROPAGATED_TAGS], tag, key_len);
-      }
-    } else {
-      added = tag_set_add_tag(&tags->tags[LOCAL_TAGS], tag, key_len);
-    }
-  }
-  if (deleted) {
-    if (call_add) {
-      tags->status.n_modified_tags++;
-    } else {
-      tags->status.n_deleted_tags++;
-    }
-  } else {
-    if (added) {
-      tags->status.n_added_tags++;
-    } else {
-      tags->status.n_ignored_tags++;
-    }
-  }
-}
-
-// Remove memory used for deleted tags from the tag set. Basic algorithm:
-// 1) Walk through tag set to find first deleted tag. Record where it is.
-// 2) Find the next not-deleted tag. Copy all of kvm from there to the end
-//    "over" the deleted tags
-// 3) repeat #1 and #2 until we have seen all tags
-// 4) if we are still looking for a not-deleted tag, then all the end portion
-//    of the kvm is deleted. Just reduce the used amount of memory by the
-//    appropriate amount.
-static void tag_set_flatten(struct tag_set *tags) {
-  if (tags->ntags == tags->ntags_alloc) return;
-  bool found_deleted = false;  // found a deleted tag.
-  char *kvp = tags->kvm;
-  char *dbase = NULL;  // record location of deleted tag
-  for (int i = 0; i < tags->ntags_alloc; i++) {
-    struct raw_tag tag;
-    char *next_kvp = decode_tag(&tag, kvp, 0);
-    if (found_deleted) {
-      if (!CENSUS_TAG_IS_DELETED(tag.flags)) {
-        ptrdiff_t reduce = kvp - dbase;  // #bytes in deleted tags
-        GPR_ASSERT(reduce > 0);
-        ptrdiff_t copy_size = tags->kvm + tags->kvm_used - kvp;
-        GPR_ASSERT(copy_size > 0);
-        memmove(dbase, kvp, (size_t)copy_size);
-        tags->kvm_used -= (size_t)reduce;
-        next_kvp -= reduce;
-        found_deleted = false;
-      }
-    } else {
-      if (CENSUS_TAG_IS_DELETED(tag.flags)) {
-        dbase = kvp;
-        found_deleted = true;
-      }
-    }
-    kvp = next_kvp;
-  }
-  if (found_deleted) {
-    GPR_ASSERT(dbase > tags->kvm);
-    tags->kvm_used = (size_t)(dbase - tags->kvm);
-  }
-  tags->ntags_alloc = tags->ntags;
-}
-
-census_tag_set *census_tag_set_create(
-    const census_tag_set *base, const census_tag *tags, int ntags,
-    census_tag_set_create_status const **status) {
-  census_tag_set *new_ts = gpr_malloc(sizeof(census_tag_set));
-  // If we are given a base, copy it into our new tag set. Otherwise set it
-  // to zero/NULL everything.
-  if (base == NULL) {
-    memset(new_ts, 0, sizeof(census_tag_set));
-  } else {
-    tag_set_copy(&new_ts->tags[PROPAGATED_TAGS], &base->tags[PROPAGATED_TAGS]);
-    tag_set_copy(&new_ts->tags[PROPAGATED_BINARY_TAGS],
-                 &base->tags[PROPAGATED_BINARY_TAGS]);
-    tag_set_copy(&new_ts->tags[LOCAL_TAGS], &base->tags[LOCAL_TAGS]);
-    memset(&new_ts->status, 0, sizeof(new_ts->status));
-  }
-  // Walk over the additional tags and, for those that aren't invalid, modify
-  // the tag set to add/replace/delete as required.
-  for (int i = 0; i < ntags; i++) {
-    const census_tag *tag = &tags[i];
-    size_t key_len = strlen(tag->key) + 1;
-    // ignore the tag if it is too long/short.
-    if (key_len != 1 && key_len <= CENSUS_MAX_TAG_KV_LEN &&
-        tag->value_len <= CENSUS_MAX_TAG_KV_LEN) {
-      cts_modify_tag(new_ts, tag, key_len);
-    } else {
-      new_ts->status.n_invalid_tags++;
-    }
-  }
-  // Remove any deleted tags, update status if needed, and return.
-  tag_set_flatten(&new_ts->tags[PROPAGATED_TAGS]);
-  tag_set_flatten(&new_ts->tags[PROPAGATED_BINARY_TAGS]);
-  tag_set_flatten(&new_ts->tags[LOCAL_TAGS]);
-  new_ts->status.n_propagated_tags = new_ts->tags[PROPAGATED_TAGS].ntags;
-  new_ts->status.n_propagated_binary_tags =
-      new_ts->tags[PROPAGATED_BINARY_TAGS].ntags;
-  new_ts->status.n_local_tags = new_ts->tags[LOCAL_TAGS].ntags;
-  if (status) {
-    *status = &new_ts->status;
-  }
-  return new_ts;
-}
-
-const census_tag_set_create_status *census_tag_set_get_create_status(
-    const census_tag_set *tags) {
-  return &tags->status;
-}
-
-void census_tag_set_destroy(census_tag_set *tags) {
-  gpr_free(tags->tags[PROPAGATED_TAGS].kvm);
-  gpr_free(tags->tags[PROPAGATED_BINARY_TAGS].kvm);
-  gpr_free(tags->tags[LOCAL_TAGS].kvm);
-  gpr_free(tags);
-}
-
-// Initialize a tag set iterator. Must be called before first use of the
-// iterator.
-void census_tag_set_initialize_iterator(const census_tag_set *tags,
-                                        census_tag_set_iterator *iterator) {
-  iterator->tags = tags;
-  iterator->index = 0;
-  if (tags->tags[PROPAGATED_TAGS].ntags != 0) {
-    iterator->base = PROPAGATED_TAGS;
-    iterator->kvm = tags->tags[PROPAGATED_TAGS].kvm;
-  } else if (tags->tags[PROPAGATED_BINARY_TAGS].ntags != 0) {
-    iterator->base = PROPAGATED_BINARY_TAGS;
-    iterator->kvm = tags->tags[PROPAGATED_BINARY_TAGS].kvm;
-  } else if (tags->tags[LOCAL_TAGS].ntags != 0) {
-    iterator->base = LOCAL_TAGS;
-    iterator->kvm = tags->tags[LOCAL_TAGS].kvm;
-  } else {
-    iterator->base = -1;
-  }
-}
-
-// Get the contents of the "next" tag in the tag set. If there are no more
-// tags in the tag set, returns 0 (and 'tag' contents will be unchanged),
-// otherwise returns 1. */
-int census_tag_set_next_tag(census_tag_set_iterator *iterator,
-                            census_tag *tag) {
-  if (iterator->base < 0) {
-    return 0;
-  }
-  struct raw_tag raw;
-  iterator->kvm = decode_tag(&raw, iterator->kvm, 0);
-  tag->key = raw.key;
-  tag->value = raw.value;
-  tag->value_len = raw.value_len;
-  tag->flags = raw.flags;
-  if (++iterator->index == iterator->tags->tags[iterator->base].ntags) {
-    do {
-      if (iterator->base == LOCAL_TAGS) {
-        iterator->base = -1;
-        return 1;
-      }
-    } while (iterator->tags->tags[++iterator->base].ntags == 0);
-    iterator->index = 0;
-    iterator->kvm = iterator->tags->tags[iterator->base].kvm;
-  }
-  return 1;
-}
-
-// Find a tag in a tag_set by key. Return true if found, false otherwise.
-static bool tag_set_get_tag_by_key(const struct tag_set *tags, const char *key,
-                                   size_t key_len, census_tag *tag) {
-  char *kvp = tags->kvm;
-  for (int i = 0; i < tags->ntags; i++) {
-    struct raw_tag raw;
-    kvp = decode_tag(&raw, kvp, 0);
-    if (key_len == raw.key_len && memcmp(raw.key, key, key_len) == 0) {
-      tag->key = raw.key;
-      tag->value = raw.value;
-      tag->value_len = raw.value_len;
-      tag->flags = raw.flags;
-      return true;
-    }
-  }
-  return false;
-}
-
-int census_tag_set_get_tag_by_key(const census_tag_set *tags, const char *key,
-                                  census_tag *tag) {
-  size_t key_len = strlen(key) + 1;
-  if (key_len == 1) {
-    return 0;
-  }
-  if (tag_set_get_tag_by_key(&tags->tags[PROPAGATED_TAGS], key, key_len, tag) ||
-      tag_set_get_tag_by_key(&tags->tags[PROPAGATED_BINARY_TAGS], key, key_len,
-                             tag) ||
-      tag_set_get_tag_by_key(&tags->tags[LOCAL_TAGS], key, key_len, tag)) {
-    return 1;
-  }
-  return 0;
-}
-
-// tag_set encoding and decoding functions.
-//
-// Wire format for tag sets on the wire:
-//
-// First, a tag set header:
-//
-// offset   bytes  description
-//   0        1    version number
-//   1        1    number of bytes in this header. This allows for future
-//                 expansion.
-//   2        1    number of bytes in each tag header.
-//   3        1    ntags value from tag set.
-//
-//   This is followed by the key/value memory from struct tag_set.
-
-#define ENCODED_VERSION 0      // Version number
-#define ENCODED_HEADER_SIZE 4  // size of tag set header
-
-// Encode a tag set. Returns 0 if buffer is too small.
-static size_t tag_set_encode(const struct tag_set *tags, char *buffer,
-                             size_t buf_size) {
-  if (buf_size < ENCODED_HEADER_SIZE + tags->kvm_used) {
-    return 0;
-  }
-  buf_size -= ENCODED_HEADER_SIZE;
-  *buffer++ = (char)ENCODED_VERSION;
-  *buffer++ = (char)ENCODED_HEADER_SIZE;
-  *buffer++ = (char)TAG_HEADER_SIZE;
-  *buffer++ = (char)tags->ntags;
-  if (tags->ntags == 0) {
-    return ENCODED_HEADER_SIZE;
-  }
-  memcpy(buffer, tags->kvm, tags->kvm_used);
-  return ENCODED_HEADER_SIZE + tags->kvm_used;
-}
-
-char *census_tag_set_encode(const census_tag_set *tags, char *buffer,
-                            size_t buf_size, size_t *print_buf_size,
-                            size_t *bin_buf_size) {
-  *print_buf_size =
-      tag_set_encode(&tags->tags[PROPAGATED_TAGS], buffer, buf_size);
-  if (*print_buf_size == 0) {
-    return NULL;
-  }
-  char *b_buffer = buffer + *print_buf_size;
-  *bin_buf_size = tag_set_encode(&tags->tags[PROPAGATED_BINARY_TAGS], b_buffer,
-                                 buf_size - *print_buf_size);
-  if (*bin_buf_size == 0) {
-    return NULL;
-  }
-  return b_buffer;
-}
-
-// Decode a tag set.
-static void tag_set_decode(struct tag_set *tags, const char *buffer,
-                           size_t size) {
-  uint8_t version = (uint8_t)(*buffer++);
-  uint8_t header_size = (uint8_t)(*buffer++);
-  uint8_t tag_header_size = (uint8_t)(*buffer++);
-  tags->ntags = tags->ntags_alloc = (int)(*buffer++);
-  if (tags->ntags == 0) {
-    tags->ntags_alloc = 0;
-    tags->kvm_size = 0;
-    tags->kvm_used = 0;
-    tags->kvm = NULL;
-    return;
-  }
-  if (header_size != ENCODED_HEADER_SIZE) {
-    GPR_ASSERT(version != ENCODED_VERSION);
-    GPR_ASSERT(ENCODED_HEADER_SIZE < header_size);
-    buffer += (header_size - ENCODED_HEADER_SIZE);
-  }
-  tags->kvm_used = size - header_size;
-  tags->kvm_size = tags->kvm_used + CENSUS_MAX_TAG_KV_LEN;
-  tags->kvm = gpr_malloc(tags->kvm_size);
-  if (tag_header_size != TAG_HEADER_SIZE) {
-    // something new in the tag information. I don't understand it, so
-    // don't copy it over.
-    GPR_ASSERT(version != ENCODED_VERSION);
-    GPR_ASSERT(tag_header_size > TAG_HEADER_SIZE);
-    char *kvp = tags->kvm;
-    for (int i = 0; i < tags->ntags; i++) {
-      memcpy(kvp, buffer, TAG_HEADER_SIZE);
-      kvp += header_size;
-      struct raw_tag raw;
-      buffer =
-          decode_tag(&raw, (char *)buffer, tag_header_size - TAG_HEADER_SIZE);
-      memcpy(kvp, raw.key, (size_t)raw.key_len + raw.value_len);
-      kvp += raw.key_len + raw.value_len;
-    }
-  } else {
-    memcpy(tags->kvm, buffer, tags->kvm_used);
-  }
-}
-
-census_tag_set *census_tag_set_decode(const char *buffer, size_t size,
-                                      const char *bin_buffer, size_t bin_size) {
-  census_tag_set *new_ts = gpr_malloc(sizeof(census_tag_set));
-  memset(&new_ts->tags[LOCAL_TAGS], 0, sizeof(struct tag_set));
-  if (buffer == NULL) {
-    memset(&new_ts->tags[PROPAGATED_TAGS], 0, sizeof(struct tag_set));
-  } else {
-    tag_set_decode(&new_ts->tags[PROPAGATED_TAGS], buffer, size);
-  }
-  if (bin_buffer == NULL) {
-    memset(&new_ts->tags[PROPAGATED_BINARY_TAGS], 0, sizeof(struct tag_set));
-  } else {
-    tag_set_decode(&new_ts->tags[PROPAGATED_BINARY_TAGS], bin_buffer, bin_size);
-  }
-  memset(&new_ts->status, 0, sizeof(new_ts->status));
-  new_ts->status.n_propagated_tags = new_ts->tags[PROPAGATED_TAGS].ntags;
-  new_ts->status.n_propagated_binary_tags =
-      new_ts->tags[PROPAGATED_BINARY_TAGS].ntags;
-  // TODO(aveitch): check that BINARY flag is correct for each type.
-  return new_ts;
-}
diff --git a/src/core/security/server_secure_chttp2.c b/src/core/security/server_secure_chttp2.c
index ee3443c828..84a883390c 100644
--- a/src/core/security/server_secure_chttp2.c
+++ b/src/core/security/server_secure_chttp2.c
@@ -208,6 +208,14 @@ int grpc_server_add_secure_http2_port(grpc_server *server, const char *addr,
     goto error;
   }
 
+  state->server = server;
+  state->tcp = tcp;
+  state->sc = sc;
+  state->creds = grpc_server_credentials_ref(creds);
+  state->is_shutdown = 0;
+  gpr_mu_init(&state->mu);
+  gpr_ref_init(&state->refcount, 1);
+
   for (i = 0; i < resolved->naddrs; i++) {
     port_temp = grpc_tcp_server_add_port(
         tcp, (struct sockaddr *)&resolved->addrs[i].addr,
@@ -233,15 +241,6 @@ int grpc_server_add_secure_http2_port(grpc_server *server, const char *addr,
   }
   grpc_resolved_addresses_destroy(resolved);
 
-  state->server = server;
-  state->tcp = tcp;
-  state->sc = sc;
-  state->creds = grpc_server_credentials_ref(creds);
-
-  state->is_shutdown = 0;
-  gpr_mu_init(&state->mu);
-  gpr_ref_init(&state->refcount, 1);
-
   /* Register with the server only upon success */
   grpc_server_add_listener(&exec_ctx, server, state, start, destroy);
 
@@ -250,17 +249,18 @@ int grpc_server_add_secure_http2_port(grpc_server *server, const char *addr,
 
 /* Error path: cleanup and return */
 error:
-  if (sc) {
-    GRPC_SECURITY_CONNECTOR_UNREF(sc, "server");
-  }
   if (resolved) {
     grpc_resolved_addresses_destroy(resolved);
   }
   if (tcp) {
     grpc_tcp_server_unref(&exec_ctx, tcp);
-  }
-  if (state) {
-    gpr_free(state);
+  } else {
+    if (sc) {
+      GRPC_SECURITY_CONNECTOR_UNREF(sc, "server");
+    }
+    if (state) {
+      gpr_free(state);
+    }
   }
   grpc_exec_ctx_finish(&exec_ctx);
   return 0;
diff --git a/src/core/support/env_linux.c b/src/core/support/env_linux.c
index b5832a5917..442cd8298e 100644
--- a/src/core/support/env_linux.c
+++ b/src/core/support/env_linux.c
@@ -42,33 +42,23 @@
 
 #include "src/core/support/env.h"
 
+#include <dlfcn.h>
 #include <stdlib.h>
 
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
+#include <grpc/support/useful.h>
 
 #include "src/core/support/string.h"
 
-/* Declare weak symbols for versions of secure_getenv that *may* be
- * on a users machine. Older libc's call this __secure_getenv, even
- * older don't support the functionality.
- *
- * If a symbol is not present, these will be equal to NULL.
- */
-char *__attribute__((weak)) secure_getenv(const char *name);
-char *__attribute__((weak)) __secure_getenv(const char *name);
-
 char *gpr_getenv(const char *name) {
-  static char *(*getenv_func)(const char *) = secure_getenv;
+  typedef char *(*getenv_type)(const char *);
+  static getenv_type getenv_func = NULL;
   /* Check to see which getenv variant is supported (go from most
    * to least secure) */
-  if (getenv_func == NULL) {
-    getenv_func = __secure_getenv;
-    if (getenv_func == NULL) {
-      gpr_log(GPR_DEBUG,
-              "No secure_getenv. Please consider upgrading your libc.");
-      getenv_func = getenv;
-    }
+  const char *names[] = {"secure_getenv", "__secure_getenv", "getenv"};
+  for (size_t i = 0; getenv_func == NULL && i < GPR_ARRAY_SIZE(names); i++) {
+    getenv_func = (getenv_type)dlsym(RTLD_DEFAULT, names[i]);
   }
   char *result = getenv_func(name);
   return result == NULL ? result : gpr_strdup(result);
diff --git a/src/core/support/stack_lockfree.c b/src/core/support/stack_lockfree.c
index cd0afddf9d..2c97ee18be 100644
--- a/src/core/support/stack_lockfree.c
+++ b/src/core/support/stack_lockfree.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -99,6 +99,11 @@ gpr_stack_lockfree *gpr_stack_lockfree_create(size_t entries) {
 
   /* Point the head at reserved dummy entry */
   stack->head.contents.index = INVALID_ENTRY_INDEX;
+  /* Fill in the pad and aba_ctr to avoid confusing memcheck tools */
+#ifdef GPR_ARCH_64
+  stack->head.contents.pad = 0;
+#endif
+  stack->head.contents.aba_ctr = 0;
   return stack;
 }
 
@@ -115,6 +120,11 @@ int gpr_stack_lockfree_push(gpr_stack_lockfree *stack, int entry) {
 
   /* First fill in the entry's index and aba ctr for new head */
   newhead.contents.index = (uint16_t)entry;
+#ifdef GPR_ARCH_64
+  /* Fill in the pad to avoid confusing memcheck tools */
+  newhead.contents.pad = 0;
+#endif
+
   /* Also post-increment the aba_ctr */
   curent.atm = gpr_atm_no_barrier_load(&stack->entries[entry].atm);
   newhead.contents.aba_ctr = ++curent.contents.aba_ctr;
diff --git a/src/core/support/subprocess_windows.c b/src/core/support/subprocess_windows.c
index d48c5437f0..2b25ef063a 100644
--- a/src/core/support/subprocess_windows.c
+++ b/src/core/support/subprocess_windows.c
@@ -59,7 +59,7 @@ gpr_subprocess *gpr_subprocess_create(int argc, const char **argv) {
   STARTUPINFO si;
   PROCESS_INFORMATION pi;
 
-  char *args = gpr_strjoin_sep(argv, argc, " ", NULL);
+  char *args = gpr_strjoin_sep(argv, (size_t)argc, " ", NULL);
   TCHAR *args_tchar;
 
   args_tchar = gpr_char_to_tchar(args);
@@ -119,7 +119,7 @@ getExitCode:
     return 0;
   }
   if (GetExitCodeProcess(p->pi.hProcess, &dwExitCode)) {
-    return dwExitCode;
+    return (int)dwExitCode;
   } else {
     return -1;  // failed to get exit code
   }
diff --git a/src/core/support/time_posix.c b/src/core/support/time_posix.c
index 06bb78c913..1f92d7f090 100644
--- a/src/core/support/time_posix.c
+++ b/src/core/support/time_posix.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -39,6 +39,9 @@
 #include <stdlib.h>
 #include <time.h>
 #include <unistd.h>
+#ifdef __linux__
+#include <sys/syscall.h>
+#endif
 #include <grpc/support/log.h>
 #include <grpc/support/time.h>
 #include "src/core/support/block_annotate.h"
@@ -70,7 +73,8 @@ static gpr_timespec gpr_from_timespec(struct timespec ts,
 }
 
 /** maps gpr_clock_type --> clockid_t for clock_gettime */
-static clockid_t clockid_for_gpr_clock[] = {CLOCK_MONOTONIC, CLOCK_REALTIME};
+static const clockid_t clockid_for_gpr_clock[] = {CLOCK_MONOTONIC,
+                                                  CLOCK_REALTIME};
 
 void gpr_time_init(void) { gpr_precise_clock_init(); }
 
@@ -82,7 +86,12 @@ gpr_timespec gpr_now(gpr_clock_type clock_type) {
     gpr_precise_clock_now(&ret);
     return ret;
   } else {
+#if defined(__linux__) && !defined(GPR_NO_DIRECT_SYSCALLS)
+    /* avoid ABI problems by invoking syscalls directly */
+    syscall(SYS_clock_gettime, clockid_for_gpr_clock[clock_type], &now);
+#else
     clock_gettime(clockid_for_gpr_clock[clock_type], &now);
+#endif
     return gpr_from_timespec(now, clock_type);
   }
 }
diff --git a/src/core/support/wrap_memcpy.c b/src/core/support/wrap_memcpy.c
new file mode 100644
index 0000000000..15c289f7b8
--- /dev/null
+++ b/src/core/support/wrap_memcpy.c
@@ -0,0 +1,53 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <string.h>
+
+/* Provide a wrapped memcpy for targets that need to be backwards
+ * compatible with older libc's.
+ *
+ * Enable by setting LDFLAGS=-Wl,-wrap,memcpy when linking.
+ */
+
+#ifdef __linux__
+#ifdef __x86_64__
+__asm__(".symver memcpy,memcpy@GLIBC_2.2.5");
+void *__wrap_memcpy(void *destination, const void *source, size_t num) {
+  return memcpy(destination, source, num);
+}
+#else /* !__x86_64__ */
+void *__wrap_memcpy(void *destination, const void *source, size_t num) {
+  return memmove(destination, source, num);
+}
+#endif
+#endif
diff --git a/src/cpp/server/server_context.cc b/src/cpp/server/server_context.cc
index 3732c1f090..e205a1969b 100644
--- a/src/cpp/server/server_context.cc
+++ b/src/cpp/server/server_context.cc
@@ -33,14 +33,14 @@
 
 #include <grpc++/server_context.h>
 
-#include <grpc/compression.h>
-#include <grpc/grpc.h>
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
 #include <grpc++/completion_queue.h>
 #include <grpc++/impl/call.h>
 #include <grpc++/impl/sync.h>
 #include <grpc++/support/time.h>
+#include <grpc/compression.h>
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
 
 #include "src/core/channel/compress_filter.h"
 #include "src/cpp/common/create_auth_context.h"
@@ -173,6 +173,14 @@ void ServerContext::AddTrailingMetadata(const grpc::string& key,
   trailing_metadata_.insert(std::make_pair(key, value));
 }
 
+void ServerContext::TryCancel() const {
+  grpc_call_error err = grpc_call_cancel_with_status(
+      call_, GRPC_STATUS_CANCELLED, "Cancelled on the server side", NULL);
+  if (err != GRPC_CALL_OK) {
+    gpr_log(GPR_ERROR, "TryCancel failed with: %d", err);
+  }
+}
+
 bool ServerContext::IsCancelled() const {
   return completion_op_ && completion_op_->CheckCancelled(cq_);
 }
diff --git a/src/csharp/Grpc.Core/Grpc.Core.csproj b/src/csharp/Grpc.Core/Grpc.Core.csproj
index 307c0e8783..9587503e4b 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.csproj
+++ b/src/csharp/Grpc.Core/Grpc.Core.csproj
@@ -128,6 +128,7 @@
     <Compile Include="Profiling\ProfilerScope.cs" />
     <Compile Include="Profiling\IProfiler.cs" />
     <Compile Include="Profiling\Profilers.cs" />
+    <Compile Include="Internal\DefaultSslRootsOverride.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="Grpc.Core.nuspec" />
@@ -135,4 +136,12 @@
   </ItemGroup>
   <Import Project="NativeDeps.targets" />
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
+  <ItemGroup>
+    <Folder Include="Resources\" />
+  </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="..\..\..\etc\roots.pem">
+      <Link>Resources\roots.pem</Link>
+    </EmbeddedResource>
+  </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/csharp/Grpc.Core/Grpc.Core.nuspec b/src/csharp/Grpc.Core/Grpc.Core.nuspec
index 9a4c1a3c85..49bccb050e 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.nuspec
+++ b/src/csharp/Grpc.Core/Grpc.Core.nuspec
@@ -20,7 +20,6 @@
     </dependencies>
   </metadata>
   <files>
-    <file src="..\..\..\etc\roots.pem" target="tools" />
     <file src="bin/ReleaseSigned/Grpc.Core.dll" target="lib/net45" />
     <file src="bin/ReleaseSigned/Grpc.Core.pdb" target="lib/net45" />
     <file src="bin/ReleaseSigned/Grpc.Core.xml" target="lib/net45" />
diff --git a/src/csharp/Grpc.Core/Internal/DefaultSslRootsOverride.cs b/src/csharp/Grpc.Core/Internal/DefaultSslRootsOverride.cs
new file mode 100644
index 0000000000..eeaa7add81
--- /dev/null
+++ b/src/csharp/Grpc.Core/Internal/DefaultSslRootsOverride.cs
@@ -0,0 +1,72 @@
+#region Copyright notice and license
+
+// Copyright 2015-2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Collections.Concurrent;
+using System.Diagnostics;
+using System.IO;
+using System.Reflection;
+using System.Runtime.InteropServices;
+using System.Threading;
+
+namespace Grpc.Core.Internal
+{
+    /// <summary>
+    /// Overrides the content of default SSL roots.
+    /// </summary>
+    internal static class DefaultSslRootsOverride
+    {
+        const string RootsPemResourceName = "Grpc.Core.Resources.roots.pem";
+        static object staticLock = new object();
+
+        /// <summary>
+        /// Overrides C core's default roots with roots.pem loaded as embedded resource.
+        /// </summary>
+        public static void Override(NativeMethods native)
+        {
+            lock (staticLock)
+            {
+                var stream = Assembly.GetExecutingAssembly().GetManifestResourceStream(RootsPemResourceName);
+                if (stream == null)
+                {
+                    throw new IOException(string.Format("Error loading the embedded resource \"{0}\"", RootsPemResourceName));   
+                }
+                using (var streamReader = new StreamReader(stream))
+                {
+                    var pemRootCerts = streamReader.ReadToEnd();
+                    native.grpcsharp_override_default_ssl_roots(pemRootCerts);
+                }
+            }
+        }
+    }
+}
diff --git a/src/csharp/Grpc.Core/Internal/NativeExtension.cs b/src/csharp/Grpc.Core/Internal/NativeExtension.cs
index 137533b3ef..4c742ab6c3 100644
--- a/src/csharp/Grpc.Core/Internal/NativeExtension.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeExtension.cs
@@ -60,6 +60,8 @@ namespace Grpc.Core.Internal
             // to make sure we don't lose any logs.
             NativeLogRedirector.Redirect(this.nativeMethods);
 
+            DefaultSslRootsOverride.Override(this.nativeMethods);
+
             Logger.Debug("gRPC native library loaded successfully.");
         }
 
@@ -104,7 +106,7 @@ namespace Grpc.Core.Internal
 
         private static string GetExecutingAssemblyDirectory()
         {
-            return Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
+            return Path.GetDirectoryName(typeof(NativeExtension).GetTypeInfo().Assembly.Location);
         }
 
         private static string GetPlatformString()
diff --git a/src/csharp/Grpc.Core/Internal/NativeMethods.cs b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
index af37d61c73..19a573581e 100644
--- a/src/csharp/Grpc.Core/Internal/NativeMethods.cs
+++ b/src/csharp/Grpc.Core/Internal/NativeMethods.cs
@@ -97,6 +97,7 @@ namespace Grpc.Core.Internal
         public readonly Delegates.grpcsharp_channel_args_set_integer_delegate grpcsharp_channel_args_set_integer;
         public readonly Delegates.grpcsharp_channel_args_destroy_delegate grpcsharp_channel_args_destroy;
 
+        public readonly Delegates.grpcsharp_override_default_ssl_roots grpcsharp_override_default_ssl_roots;
         public readonly Delegates.grpcsharp_ssl_credentials_create_delegate grpcsharp_ssl_credentials_create;
         public readonly Delegates.grpcsharp_composite_channel_credentials_create_delegate grpcsharp_composite_channel_credentials_create;
         public readonly Delegates.grpcsharp_channel_credentials_release_delegate grpcsharp_channel_credentials_release;
@@ -203,6 +204,7 @@ namespace Grpc.Core.Internal
                 this.grpcsharp_channel_args_set_integer = GetMethodDelegate<Delegates.grpcsharp_channel_args_set_integer_delegate>(library);
                 this.grpcsharp_channel_args_destroy = GetMethodDelegate<Delegates.grpcsharp_channel_args_destroy_delegate>(library);
 
+                this.grpcsharp_override_default_ssl_roots = GetMethodDelegate<Delegates.grpcsharp_override_default_ssl_roots>(library);
                 this.grpcsharp_ssl_credentials_create = GetMethodDelegate<Delegates.grpcsharp_ssl_credentials_create_delegate>(library);
                 this.grpcsharp_composite_channel_credentials_create = GetMethodDelegate<Delegates.grpcsharp_composite_channel_credentials_create_delegate>(library);
                 this.grpcsharp_channel_credentials_release = GetMethodDelegate<Delegates.grpcsharp_channel_credentials_release_delegate>(library);
@@ -306,6 +308,7 @@ namespace Grpc.Core.Internal
                 this.grpcsharp_channel_args_set_integer = PInvokeMethods.grpcsharp_channel_args_set_integer;
                 this.grpcsharp_channel_args_destroy = PInvokeMethods.grpcsharp_channel_args_destroy;
 
+                this.grpcsharp_override_default_ssl_roots = PInvokeMethods.grpcsharp_override_default_ssl_roots;
                 this.grpcsharp_ssl_credentials_create = PInvokeMethods.grpcsharp_ssl_credentials_create;
                 this.grpcsharp_composite_channel_credentials_create = PInvokeMethods.grpcsharp_composite_channel_credentials_create;
                 this.grpcsharp_channel_credentials_release = PInvokeMethods.grpcsharp_channel_credentials_release;
@@ -449,6 +452,7 @@ namespace Grpc.Core.Internal
             public delegate void grpcsharp_channel_args_set_integer_delegate(ChannelArgsSafeHandle args, UIntPtr index, string key, int value);
             public delegate void grpcsharp_channel_args_destroy_delegate(IntPtr args);
 
+            public delegate void grpcsharp_override_default_ssl_roots(string pemRootCerts);
             public delegate ChannelCredentialsSafeHandle grpcsharp_ssl_credentials_create_delegate(string pemRootCerts, string keyCertPairCertChain, string keyCertPairPrivateKey);
             public delegate ChannelCredentialsSafeHandle grpcsharp_composite_channel_credentials_create_delegate(ChannelCredentialsSafeHandle channelCreds, CallCredentialsSafeHandle callCreds);
             public delegate void grpcsharp_channel_credentials_release_delegate(IntPtr credentials);
@@ -658,6 +662,9 @@ namespace Grpc.Core.Internal
             // ChannelCredentialsSafeHandle
 
             [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
+            public static extern void grpcsharp_override_default_ssl_roots(string pemRootCerts);
+
+            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
             public static extern ChannelCredentialsSafeHandle grpcsharp_ssl_credentials_create(string pemRootCerts, string keyCertPairCertChain, string keyCertPairPrivateKey);
 
             [DllImport("grpc_csharp_ext.dll")]
diff --git a/src/csharp/ext/grpc_csharp_ext.c b/src/csharp/ext/grpc_csharp_ext.c
index 26f1537398..1df74a0993 100644
--- a/src/csharp/ext/grpc_csharp_ext.c
+++ b/src/csharp/ext/grpc_csharp_ext.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -835,6 +835,30 @@ grpcsharp_server_request_call(grpc_server *server, grpc_completion_queue *cq,
 
 /* Security */
 
+static char *default_pem_root_certs = NULL;
+
+static grpc_ssl_roots_override_result override_ssl_roots_handler(
+    char **pem_root_certs) {
+  if (!default_pem_root_certs) {
+    *pem_root_certs = NULL;
+    return GRPC_SSL_ROOTS_OVERRIDE_FAIL_PERMANENTLY;
+  }
+  *pem_root_certs = gpr_strdup(default_pem_root_certs);
+  return GRPC_SSL_ROOTS_OVERRIDE_OK;
+}
+
+GPR_EXPORT void GPR_CALLTYPE grpcsharp_override_default_ssl_roots(
+    const char *pem_root_certs) {
+  /*
+   * This currently wastes ~300kB of memory by keeping a copy of roots
+   * in a static variable, but for desktop/server use, the overhead
+   * is negligible. In the future, we might want to change the behavior
+   * for mobile (e.g. Xamarin).
+   */
+  default_pem_root_certs = gpr_strdup(pem_root_certs);
+  grpc_set_ssl_roots_override_callback(override_ssl_roots_handler);
+}
+
 GPR_EXPORT grpc_channel_credentials *GPR_CALLTYPE
 grpcsharp_ssl_credentials_create(const char *pem_root_certs,
                                  const char *key_cert_pair_cert_chain,
@@ -917,6 +941,7 @@ GPR_EXPORT grpc_call_credentials *GPR_CALLTYPE grpcsharp_composite_call_credenti
   return grpc_composite_call_credentials_create(creds1, creds2, NULL);
 }
 
+
 /* Metadata credentials plugin */
 
 GPR_EXPORT void GPR_CALLTYPE grpcsharp_metadata_credentials_notify_from_plugin(
diff --git a/src/node/performance/worker_service_impl.js b/src/node/performance/worker_service_impl.js
index 99ae32127e..1439249878 100644
--- a/src/node/performance/worker_service_impl.js
+++ b/src/node/performance/worker_service_impl.js
@@ -33,9 +33,15 @@
 
 'use strict';
 
+var os = require('os');
 var BenchmarkClient = require('./benchmark_client');
 var BenchmarkServer = require('./benchmark_server');
 
+exports.quitWorker = function quitWorker(call, callback) {
+  callback(null, {});
+  process.exit(0);
+}
+
 exports.runClient = function runClient(call) {
   var client;
   call.on('data', function(request) {
@@ -130,3 +136,7 @@ exports.runServer = function runServer(call) {
     });
   });
 };
+
+exports.coreCount = function coreCount(call, callback) {
+  callback(null, {cores: os.cpus().length});
+};
diff --git a/src/php/ext/grpc/config.m4 b/src/php/ext/grpc/config.m4
index 0fb843d51f..b825a84215 100755
--- a/src/php/ext/grpc/config.m4
+++ b/src/php/ext/grpc/config.m4
@@ -50,17 +50,6 @@ if test "$PHP_GRPC" != "no"; then
 
   PHP_ADD_LIBPATH($GRPC_LIBDIR)
 
-  PHP_CHECK_LIBRARY(gpr,gpr_now,
-  [
-    PHP_ADD_LIBRARY(gpr,,GRPC_SHARED_LIBADD)
-    PHP_ADD_LIBRARY(gpr)
-    AC_DEFINE(HAVE_GPRLIB,1,[ ])
-  ],[
-    AC_MSG_ERROR([wrong gpr lib version or lib not found])
-  ],[
-    -L$GRPC_LIBDIR
-  ])
-
   PHP_CHECK_LIBRARY(grpc,grpc_channel_destroy,
   [
     PHP_ADD_LIBRARY(grpc,,GRPC_SHARED_LIBADD)
diff --git a/src/proto/grpc/testing/control.proto b/src/proto/grpc/testing/control.proto
index 8278836468..cc365cafe1 100644
--- a/src/proto/grpc/testing/control.proto
+++ b/src/proto/grpc/testing/control.proto
@@ -166,3 +166,6 @@ message CoreResponse {
   // Number of cores available on the server
   int32 cores = 1;
 }
+
+message Void {
+}
diff --git a/src/proto/grpc/testing/services.proto b/src/proto/grpc/testing/services.proto
index 4c8e32bb8f..a2c5fda47e 100644
--- a/src/proto/grpc/testing/services.proto
+++ b/src/proto/grpc/testing/services.proto
@@ -65,4 +65,7 @@ service WorkerService {
 
   // Just return the core count - unary call
   rpc CoreCount(CoreRequest) returns (CoreResponse);
+
+  // Quit this worker
+  rpc QuitWorker(Void) returns (Void);
 }
diff --git a/src/python/grpcio/commands.py b/src/python/grpcio/commands.py
index 98ad2e571d..490d0f07b3 100644
--- a/src/python/grpcio/commands.py
+++ b/src/python/grpcio/commands.py
@@ -52,6 +52,10 @@ import support
 
 PYTHON_STEM = os.path.dirname(os.path.abspath(__file__))
 
+BINARIES_REPOSITORY = os.environ.get(
+    'GRPC_PYTHON_BINARIES_REPOSITORY',
+    'https://storage.googleapis.com/grpc-precompiled-binaries/python/')
+
 CONF_PY_ADDENDUM = """
 extensions.append('sphinx.ext.napoleon')
 napoleon_google_docstring = True
@@ -67,7 +71,7 @@ class CommandError(Exception):
 
 # TODO(atash): Remove this once PyPI has better Linux bdist support. See
 # https://bitbucket.org/pypa/pypi/issues/120/binary-wheels-for-linux-are-not-supported
-def _get_linux_bdist_egg(decorated_basename, target_egg_basename):
+def _get_grpc_custom_bdist_egg(decorated_basename, target_egg_basename):
   """Returns a string path to a .egg file for Linux to install.
 
   If we can retrieve a pre-compiled egg from online, uses it. Else, emits a
@@ -78,10 +82,7 @@ def _get_linux_bdist_egg(decorated_basename, target_egg_basename):
   from six.moves.urllib import request
   decorated_path = decorated_basename + '.egg'
   try:
-    url = (
-        'https://storage.googleapis.com/grpc-precompiled-binaries/'
-        'python/{target}'
-            .format(target=decorated_path))
+    url = BINARIES_REPOSITORY + '/{target}'.format(target=decorated_path)
     egg_data = request.urlopen(url).read()
   except IOError as error:
     raise CommandError(
@@ -100,6 +101,7 @@ def _get_linux_bdist_egg(decorated_basename, target_egg_basename):
 
 
 class EggNameMixin(object):
+  """Mixin for setuptools.Command classes to enable acquiring the egg name."""
 
   def egg_name(self, with_custom):
     """
@@ -124,25 +126,25 @@ class Install(install.install, EggNameMixin):
   """
 
   user_options = install.install.user_options + [
-      # TODO(atash): remove this once manylinux gets on PyPI. See
+      # TODO(atash): remove this once PyPI has better Linux bdist support. See
       # https://bitbucket.org/pypa/pypi/issues/120/binary-wheels-for-linux-are-not-supported
-      ('use-linux-bdist', None,
-       'Whether to retrieve a binary for Linux instead of building from '
-       'source.'),
+      ('use-grpc-custom-bdist', None,
+       'Whether to retrieve a binary from the gRPC binary repository instead '
+       'of building from source.'),
   ]
 
   def initialize_options(self):
     install.install.initialize_options(self)
-    self.use_linux_bdist = False
+    self.use_grpc_custom_bdist = False
 
   def finalize_options(self):
     install.install.finalize_options(self)
 
   def run(self):
-    if self.use_linux_bdist:
+    if self.use_grpc_custom_bdist:
       try:
-        egg_path = _get_linux_bdist_egg(self.egg_name(True),
-                                        self.egg_name(False))
+        egg_path = _get_grpc_custom_bdist_egg(self.egg_name(True),
+                                              self.egg_name(False))
       except CommandError as error:
         sys.stderr.write(
             '\nWARNING: Failed to acquire grpcio prebuilt binary:\n'
diff --git a/src/python/grpcio/grpc/_cython/.gitignore b/src/python/grpcio/grpc/_cython/.gitignore
index c315029288..306e3ad277 100644
--- a/src/python/grpcio/grpc/_cython/.gitignore
+++ b/src/python/grpcio/grpc/_cython/.gitignore
@@ -1,5 +1,4 @@
-*.h
-*.c
+cygrpc.c
 *.a
 *.so
 *.dll
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
index 9b10d2ae75..9d6e017026 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
@@ -28,15 +28,20 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 cimport libc.time
-from libc.stdint cimport int64_t, uint32_t, int32_t
 
 
-cdef extern from "grpc/support/alloc.h":
+cdef extern from "grpc/_cython/loader.h":
+
+  ctypedef int int32_t
+  ctypedef unsigned uint32_t
+  ctypedef long int64_t
+
+  int pygrpc_load_core(const char*)
+
   void *gpr_malloc(size_t size)
   void gpr_free(void *ptr)
   void *gpr_realloc(void *p, size_t size)
 
-cdef extern from "grpc/support/slice.h":
   ctypedef struct gpr_slice:
     # don't worry about writing out the members of gpr_slice; we never access
     # them directly.
@@ -55,9 +60,6 @@ cdef extern from "grpc/support/slice.h":
   void *gpr_slice_start_ptr "GPR_SLICE_START_PTR" (gpr_slice s)
   size_t gpr_slice_length "GPR_SLICE_LENGTH" (gpr_slice s)
 
-
-cdef extern from "grpc/support/time.h":
-
   ctypedef enum gpr_clock_type:
     GPR_CLOCK_MONOTONIC
     GPR_CLOCK_REALTIME
@@ -78,8 +80,6 @@ cdef extern from "grpc/support/time.h":
   gpr_timespec gpr_convert_clock_type(gpr_timespec t,
                                       gpr_clock_type target_clock)
 
-
-cdef extern from "grpc/status.h":
   ctypedef enum grpc_status_code:
     GRPC_STATUS_OK
     GRPC_STATUS_CANCELLED
@@ -100,14 +100,10 @@ cdef extern from "grpc/status.h":
     GRPC_STATUS_DATA_LOSS
     GRPC_STATUS__DO_NOT_USE
 
-
-cdef extern from "grpc/byte_buffer_reader.h":
   struct grpc_byte_buffer_reader:
     # We don't care about the internals
     pass
 
-
-cdef extern from "grpc/byte_buffer.h":
   ctypedef struct grpc_byte_buffer:
     # We don't care about the internals.
     pass
@@ -123,9 +119,6 @@ cdef extern from "grpc/byte_buffer.h":
                                    gpr_slice *slice)
   void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader)
 
-
-cdef extern from "grpc/grpc.h":
-
   const char *GRPC_ARG_PRIMARY_USER_AGENT_STRING
   const char *GRPC_ARG_ENABLE_CENSUS
   const char *GRPC_ARG_MAX_CONCURRENT_STREAMS
@@ -333,9 +326,6 @@ cdef extern from "grpc/grpc.h":
   void grpc_server_cancel_all_calls(grpc_server *server)
   void grpc_server_destroy(grpc_server *server)
 
-
-cdef extern from "grpc/grpc_security.h":
-
   ctypedef struct grpc_ssl_pem_key_cert_pair:
     const char *private_key
     const char *certificate_chain "cert_chain"
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
index d7ad9e5215..9e14b967e0 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/records.pyx.pxi
@@ -146,8 +146,13 @@ cdef class Timespec:
         gpr_convert_clock_type(self.c_time, GPR_CLOCK_REALTIME))
     return <double>real_time.seconds + <double>real_time.nanoseconds / 1e9
 
-  infinite_future = Timespec(float("+inf"))
-  infinite_past = Timespec(float("-inf"))
+  @staticmethod
+  def infinite_future():
+    return Timespec(float("+inf"))
+
+  @staticmethod
+  def infinite_past():
+    return Timespec(float("-inf"))
 
 
 cdef class CallDetails:
diff --git a/src/python/grpcio/grpc/_cython/cygrpc.pyx b/src/python/grpcio/grpc/_cython/cygrpc.pyx
index 297c8001c5..579bac7b8a 100644
--- a/src/python/grpcio/grpc/_cython/cygrpc.pyx
+++ b/src/python/grpcio/grpc/_cython/cygrpc.pyx
@@ -29,6 +29,10 @@
 
 cimport cpython
 
+import pkg_resources
+import os.path
+import sys
+
 # TODO(atash): figure out why the coverage tool gets confused about the Cython
 # coverage plugin when the following files don't have a '.pxi' suffix.
 include "grpc/_cython/_cygrpc/call.pyx.pxi"
@@ -44,11 +48,20 @@ include "grpc/_cython/_cygrpc/server.pyx.pxi"
 
 cdef class _ModuleState:
 
+  cdef bint is_loaded
+
   def __cinit__(self):
+    if 'win32' in sys.platform:
+      filename = pkg_resources.resource_filename(
+          'grpc._cython', '_windows/grpc_c.64.python')
+      if not pygrpc_load_core(filename):
+        raise ImportError('failed to load core gRPC library')
     grpc_init()
+    self.is_loaded = True
 
   def __dealloc__(self):
-    grpc_shutdown()
+    if self.is_loaded:
+      grpc_shutdown()
 
 _module_state = _ModuleState()
 
diff --git a/src/python/grpcio/grpc/_cython/imports.generated.c b/src/python/grpcio/grpc/_cython/imports.generated.c
new file mode 100644
index 0000000000..817303c8a4
--- /dev/null
+++ b/src/python/grpcio/grpc/_cython/imports.generated.c
@@ -0,0 +1,560 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include "imports.generated.h"
+
+#ifdef GPR_WIN32
+
+census_initialize_type census_initialize_import;
+census_shutdown_type census_shutdown_import;
+census_supported_type census_supported_import;
+census_enabled_type census_enabled_import;
+census_context_create_type census_context_create_import;
+census_context_destroy_type census_context_destroy_import;
+census_context_get_status_type census_context_get_status_import;
+census_context_initialize_iterator_type census_context_initialize_iterator_import;
+census_context_next_tag_type census_context_next_tag_import;
+census_context_get_tag_type census_context_get_tag_import;
+census_context_encode_type census_context_encode_import;
+census_context_decode_type census_context_decode_import;
+census_trace_mask_type census_trace_mask_import;
+census_set_trace_mask_type census_set_trace_mask_import;
+census_start_rpc_op_timestamp_type census_start_rpc_op_timestamp_import;
+census_start_client_rpc_op_type census_start_client_rpc_op_import;
+census_set_rpc_client_peer_type census_set_rpc_client_peer_import;
+census_start_server_rpc_op_type census_start_server_rpc_op_import;
+census_start_op_type census_start_op_import;
+census_end_op_type census_end_op_import;
+census_trace_print_type census_trace_print_import;
+census_trace_scan_start_type census_trace_scan_start_import;
+census_get_trace_record_type census_get_trace_record_import;
+census_trace_scan_end_type census_trace_scan_end_import;
+census_record_values_type census_record_values_import;
+census_view_create_type census_view_create_import;
+census_view_delete_type census_view_delete_import;
+census_view_metric_type census_view_metric_import;
+census_view_naggregations_type census_view_naggregations_import;
+census_view_tags_type census_view_tags_import;
+census_view_aggregrations_type census_view_aggregrations_import;
+census_view_get_data_type census_view_get_data_import;
+census_view_reset_type census_view_reset_import;
+grpc_compression_algorithm_parse_type grpc_compression_algorithm_parse_import;
+grpc_compression_algorithm_name_type grpc_compression_algorithm_name_import;
+grpc_compression_algorithm_for_level_type grpc_compression_algorithm_for_level_import;
+grpc_compression_options_init_type grpc_compression_options_init_import;
+grpc_compression_options_enable_algorithm_type grpc_compression_options_enable_algorithm_import;
+grpc_compression_options_disable_algorithm_type grpc_compression_options_disable_algorithm_import;
+grpc_compression_options_is_algorithm_enabled_type grpc_compression_options_is_algorithm_enabled_import;
+grpc_metadata_array_init_type grpc_metadata_array_init_import;
+grpc_metadata_array_destroy_type grpc_metadata_array_destroy_import;
+grpc_call_details_init_type grpc_call_details_init_import;
+grpc_call_details_destroy_type grpc_call_details_destroy_import;
+grpc_register_plugin_type grpc_register_plugin_import;
+grpc_init_type grpc_init_import;
+grpc_shutdown_type grpc_shutdown_import;
+grpc_version_string_type grpc_version_string_import;
+grpc_completion_queue_create_type grpc_completion_queue_create_import;
+grpc_completion_queue_next_type grpc_completion_queue_next_import;
+grpc_completion_queue_pluck_type grpc_completion_queue_pluck_import;
+grpc_completion_queue_shutdown_type grpc_completion_queue_shutdown_import;
+grpc_completion_queue_destroy_type grpc_completion_queue_destroy_import;
+grpc_alarm_create_type grpc_alarm_create_import;
+grpc_alarm_cancel_type grpc_alarm_cancel_import;
+grpc_alarm_destroy_type grpc_alarm_destroy_import;
+grpc_channel_check_connectivity_state_type grpc_channel_check_connectivity_state_import;
+grpc_channel_watch_connectivity_state_type grpc_channel_watch_connectivity_state_import;
+grpc_channel_create_call_type grpc_channel_create_call_import;
+grpc_channel_ping_type grpc_channel_ping_import;
+grpc_channel_register_call_type grpc_channel_register_call_import;
+grpc_channel_create_registered_call_type grpc_channel_create_registered_call_import;
+grpc_call_start_batch_type grpc_call_start_batch_import;
+grpc_call_get_peer_type grpc_call_get_peer_import;
+grpc_census_call_set_context_type grpc_census_call_set_context_import;
+grpc_census_call_get_context_type grpc_census_call_get_context_import;
+grpc_channel_get_target_type grpc_channel_get_target_import;
+grpc_insecure_channel_create_type grpc_insecure_channel_create_import;
+grpc_lame_client_channel_create_type grpc_lame_client_channel_create_import;
+grpc_channel_destroy_type grpc_channel_destroy_import;
+grpc_call_cancel_type grpc_call_cancel_import;
+grpc_call_cancel_with_status_type grpc_call_cancel_with_status_import;
+grpc_call_destroy_type grpc_call_destroy_import;
+grpc_server_request_call_type grpc_server_request_call_import;
+grpc_server_register_method_type grpc_server_register_method_import;
+grpc_server_request_registered_call_type grpc_server_request_registered_call_import;
+grpc_server_create_type grpc_server_create_import;
+grpc_server_register_completion_queue_type grpc_server_register_completion_queue_import;
+grpc_server_add_insecure_http2_port_type grpc_server_add_insecure_http2_port_import;
+grpc_server_start_type grpc_server_start_import;
+grpc_server_shutdown_and_notify_type grpc_server_shutdown_and_notify_import;
+grpc_server_cancel_all_calls_type grpc_server_cancel_all_calls_import;
+grpc_server_destroy_type grpc_server_destroy_import;
+grpc_tracer_set_enabled_type grpc_tracer_set_enabled_import;
+grpc_header_key_is_legal_type grpc_header_key_is_legal_import;
+grpc_header_nonbin_value_is_legal_type grpc_header_nonbin_value_is_legal_import;
+grpc_is_binary_header_type grpc_is_binary_header_import;
+grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
+grpc_auth_context_property_iterator_type grpc_auth_context_property_iterator_import;
+grpc_auth_context_peer_identity_type grpc_auth_context_peer_identity_import;
+grpc_auth_context_find_properties_by_name_type grpc_auth_context_find_properties_by_name_import;
+grpc_auth_context_peer_identity_property_name_type grpc_auth_context_peer_identity_property_name_import;
+grpc_auth_context_peer_is_authenticated_type grpc_auth_context_peer_is_authenticated_import;
+grpc_call_auth_context_type grpc_call_auth_context_import;
+grpc_auth_context_release_type grpc_auth_context_release_import;
+grpc_auth_context_add_property_type grpc_auth_context_add_property_import;
+grpc_auth_context_add_cstring_property_type grpc_auth_context_add_cstring_property_import;
+grpc_auth_context_set_peer_identity_property_name_type grpc_auth_context_set_peer_identity_property_name_import;
+grpc_channel_credentials_release_type grpc_channel_credentials_release_import;
+grpc_google_default_credentials_create_type grpc_google_default_credentials_create_import;
+grpc_ssl_credentials_create_type grpc_ssl_credentials_create_import;
+grpc_call_credentials_release_type grpc_call_credentials_release_import;
+grpc_composite_channel_credentials_create_type grpc_composite_channel_credentials_create_import;
+grpc_composite_call_credentials_create_type grpc_composite_call_credentials_create_import;
+grpc_google_compute_engine_credentials_create_type grpc_google_compute_engine_credentials_create_import;
+grpc_max_auth_token_lifetime_type grpc_max_auth_token_lifetime_import;
+grpc_service_account_jwt_access_credentials_create_type grpc_service_account_jwt_access_credentials_create_import;
+grpc_google_refresh_token_credentials_create_type grpc_google_refresh_token_credentials_create_import;
+grpc_access_token_credentials_create_type grpc_access_token_credentials_create_import;
+grpc_google_iam_credentials_create_type grpc_google_iam_credentials_create_import;
+grpc_metadata_credentials_create_from_plugin_type grpc_metadata_credentials_create_from_plugin_import;
+grpc_secure_channel_create_type grpc_secure_channel_create_import;
+grpc_server_credentials_release_type grpc_server_credentials_release_import;
+grpc_ssl_server_credentials_create_type grpc_ssl_server_credentials_create_import;
+grpc_server_add_secure_http2_port_type grpc_server_add_secure_http2_port_import;
+grpc_call_set_credentials_type grpc_call_set_credentials_import;
+grpc_server_credentials_set_auth_metadata_processor_type grpc_server_credentials_set_auth_metadata_processor_import;
+gpr_malloc_type gpr_malloc_import;
+gpr_free_type gpr_free_import;
+gpr_realloc_type gpr_realloc_import;
+gpr_malloc_aligned_type gpr_malloc_aligned_import;
+gpr_free_aligned_type gpr_free_aligned_import;
+gpr_set_allocation_functions_type gpr_set_allocation_functions_import;
+gpr_get_allocation_functions_type gpr_get_allocation_functions_import;
+grpc_raw_byte_buffer_create_type grpc_raw_byte_buffer_create_import;
+grpc_raw_compressed_byte_buffer_create_type grpc_raw_compressed_byte_buffer_create_import;
+grpc_byte_buffer_copy_type grpc_byte_buffer_copy_import;
+grpc_byte_buffer_length_type grpc_byte_buffer_length_import;
+grpc_byte_buffer_destroy_type grpc_byte_buffer_destroy_import;
+grpc_byte_buffer_reader_init_type grpc_byte_buffer_reader_init_import;
+grpc_byte_buffer_reader_destroy_type grpc_byte_buffer_reader_destroy_import;
+grpc_byte_buffer_reader_next_type grpc_byte_buffer_reader_next_import;
+grpc_byte_buffer_reader_readall_type grpc_byte_buffer_reader_readall_import;
+grpc_raw_byte_buffer_from_reader_type grpc_raw_byte_buffer_from_reader_import;
+gpr_log_type gpr_log_import;
+gpr_log_message_type gpr_log_message_import;
+gpr_set_log_function_type gpr_set_log_function_import;
+gpr_slice_ref_type gpr_slice_ref_import;
+gpr_slice_unref_type gpr_slice_unref_import;
+gpr_slice_new_type gpr_slice_new_import;
+gpr_slice_new_with_len_type gpr_slice_new_with_len_import;
+gpr_slice_malloc_type gpr_slice_malloc_import;
+gpr_slice_from_copied_string_type gpr_slice_from_copied_string_import;
+gpr_slice_from_copied_buffer_type gpr_slice_from_copied_buffer_import;
+gpr_slice_from_static_string_type gpr_slice_from_static_string_import;
+gpr_slice_sub_type gpr_slice_sub_import;
+gpr_slice_sub_no_ref_type gpr_slice_sub_no_ref_import;
+gpr_slice_split_tail_type gpr_slice_split_tail_import;
+gpr_slice_split_head_type gpr_slice_split_head_import;
+gpr_empty_slice_type gpr_empty_slice_import;
+gpr_slice_cmp_type gpr_slice_cmp_import;
+gpr_slice_str_cmp_type gpr_slice_str_cmp_import;
+gpr_slice_buffer_init_type gpr_slice_buffer_init_import;
+gpr_slice_buffer_destroy_type gpr_slice_buffer_destroy_import;
+gpr_slice_buffer_add_type gpr_slice_buffer_add_import;
+gpr_slice_buffer_add_indexed_type gpr_slice_buffer_add_indexed_import;
+gpr_slice_buffer_addn_type gpr_slice_buffer_addn_import;
+gpr_slice_buffer_tiny_add_type gpr_slice_buffer_tiny_add_import;
+gpr_slice_buffer_pop_type gpr_slice_buffer_pop_import;
+gpr_slice_buffer_reset_and_unref_type gpr_slice_buffer_reset_and_unref_import;
+gpr_slice_buffer_swap_type gpr_slice_buffer_swap_import;
+gpr_slice_buffer_move_into_type gpr_slice_buffer_move_into_import;
+gpr_slice_buffer_trim_end_type gpr_slice_buffer_trim_end_import;
+gpr_slice_buffer_move_first_type gpr_slice_buffer_move_first_import;
+gpr_slice_buffer_take_first_type gpr_slice_buffer_take_first_import;
+gpr_mu_init_type gpr_mu_init_import;
+gpr_mu_destroy_type gpr_mu_destroy_import;
+gpr_mu_lock_type gpr_mu_lock_import;
+gpr_mu_unlock_type gpr_mu_unlock_import;
+gpr_mu_trylock_type gpr_mu_trylock_import;
+gpr_cv_init_type gpr_cv_init_import;
+gpr_cv_destroy_type gpr_cv_destroy_import;
+gpr_cv_wait_type gpr_cv_wait_import;
+gpr_cv_signal_type gpr_cv_signal_import;
+gpr_cv_broadcast_type gpr_cv_broadcast_import;
+gpr_once_init_type gpr_once_init_import;
+gpr_event_init_type gpr_event_init_import;
+gpr_event_set_type gpr_event_set_import;
+gpr_event_get_type gpr_event_get_import;
+gpr_event_wait_type gpr_event_wait_import;
+gpr_ref_init_type gpr_ref_init_import;
+gpr_ref_type gpr_ref_import;
+gpr_refn_type gpr_refn_import;
+gpr_unref_type gpr_unref_import;
+gpr_stats_init_type gpr_stats_init_import;
+gpr_stats_inc_type gpr_stats_inc_import;
+gpr_stats_read_type gpr_stats_read_import;
+gpr_time_0_type gpr_time_0_import;
+gpr_inf_future_type gpr_inf_future_import;
+gpr_inf_past_type gpr_inf_past_import;
+gpr_time_init_type gpr_time_init_import;
+gpr_now_type gpr_now_import;
+gpr_convert_clock_type_type gpr_convert_clock_type_import;
+gpr_time_cmp_type gpr_time_cmp_import;
+gpr_time_max_type gpr_time_max_import;
+gpr_time_min_type gpr_time_min_import;
+gpr_time_add_type gpr_time_add_import;
+gpr_time_sub_type gpr_time_sub_import;
+gpr_time_from_micros_type gpr_time_from_micros_import;
+gpr_time_from_nanos_type gpr_time_from_nanos_import;
+gpr_time_from_millis_type gpr_time_from_millis_import;
+gpr_time_from_seconds_type gpr_time_from_seconds_import;
+gpr_time_from_minutes_type gpr_time_from_minutes_import;
+gpr_time_from_hours_type gpr_time_from_hours_import;
+gpr_time_to_millis_type gpr_time_to_millis_import;
+gpr_time_similar_type gpr_time_similar_import;
+gpr_sleep_until_type gpr_sleep_until_import;
+gpr_timespec_to_micros_type gpr_timespec_to_micros_import;
+gpr_avl_create_type gpr_avl_create_import;
+gpr_avl_ref_type gpr_avl_ref_import;
+gpr_avl_unref_type gpr_avl_unref_import;
+gpr_avl_add_type gpr_avl_add_import;
+gpr_avl_remove_type gpr_avl_remove_import;
+gpr_avl_get_type gpr_avl_get_import;
+gpr_cmdline_create_type gpr_cmdline_create_import;
+gpr_cmdline_add_int_type gpr_cmdline_add_int_import;
+gpr_cmdline_add_flag_type gpr_cmdline_add_flag_import;
+gpr_cmdline_add_string_type gpr_cmdline_add_string_import;
+gpr_cmdline_on_extra_arg_type gpr_cmdline_on_extra_arg_import;
+gpr_cmdline_set_survive_failure_type gpr_cmdline_set_survive_failure_import;
+gpr_cmdline_parse_type gpr_cmdline_parse_import;
+gpr_cmdline_destroy_type gpr_cmdline_destroy_import;
+gpr_cmdline_usage_string_type gpr_cmdline_usage_string_import;
+gpr_cpu_num_cores_type gpr_cpu_num_cores_import;
+gpr_cpu_current_cpu_type gpr_cpu_current_cpu_import;
+gpr_histogram_create_type gpr_histogram_create_import;
+gpr_histogram_destroy_type gpr_histogram_destroy_import;
+gpr_histogram_add_type gpr_histogram_add_import;
+gpr_histogram_merge_type gpr_histogram_merge_import;
+gpr_histogram_percentile_type gpr_histogram_percentile_import;
+gpr_histogram_mean_type gpr_histogram_mean_import;
+gpr_histogram_stddev_type gpr_histogram_stddev_import;
+gpr_histogram_variance_type gpr_histogram_variance_import;
+gpr_histogram_maximum_type gpr_histogram_maximum_import;
+gpr_histogram_minimum_type gpr_histogram_minimum_import;
+gpr_histogram_count_type gpr_histogram_count_import;
+gpr_histogram_sum_type gpr_histogram_sum_import;
+gpr_histogram_sum_of_squares_type gpr_histogram_sum_of_squares_import;
+gpr_histogram_get_contents_type gpr_histogram_get_contents_import;
+gpr_histogram_merge_contents_type gpr_histogram_merge_contents_import;
+gpr_join_host_port_type gpr_join_host_port_import;
+gpr_split_host_port_type gpr_split_host_port_import;
+gpr_format_message_type gpr_format_message_import;
+gpr_strdup_type gpr_strdup_import;
+gpr_asprintf_type gpr_asprintf_import;
+gpr_subprocess_binary_extension_type gpr_subprocess_binary_extension_import;
+gpr_subprocess_create_type gpr_subprocess_create_import;
+gpr_subprocess_destroy_type gpr_subprocess_destroy_import;
+gpr_subprocess_join_type gpr_subprocess_join_import;
+gpr_subprocess_interrupt_type gpr_subprocess_interrupt_import;
+gpr_thd_new_type gpr_thd_new_import;
+gpr_thd_options_default_type gpr_thd_options_default_import;
+gpr_thd_options_set_detached_type gpr_thd_options_set_detached_import;
+gpr_thd_options_set_joinable_type gpr_thd_options_set_joinable_import;
+gpr_thd_options_is_detached_type gpr_thd_options_is_detached_import;
+gpr_thd_options_is_joinable_type gpr_thd_options_is_joinable_import;
+gpr_thd_currentid_type gpr_thd_currentid_import;
+gpr_thd_join_type gpr_thd_join_import;
+
+void pygrpc_load_imports(HMODULE library) {
+  census_initialize_import = (census_initialize_type) GetProcAddress(library, "census_initialize");
+  census_shutdown_import = (census_shutdown_type) GetProcAddress(library, "census_shutdown");
+  census_supported_import = (census_supported_type) GetProcAddress(library, "census_supported");
+  census_enabled_import = (census_enabled_type) GetProcAddress(library, "census_enabled");
+  census_context_create_import = (census_context_create_type) GetProcAddress(library, "census_context_create");
+  census_context_destroy_import = (census_context_destroy_type) GetProcAddress(library, "census_context_destroy");
+  census_context_get_status_import = (census_context_get_status_type) GetProcAddress(library, "census_context_get_status");
+  census_context_initialize_iterator_import = (census_context_initialize_iterator_type) GetProcAddress(library, "census_context_initialize_iterator");
+  census_context_next_tag_import = (census_context_next_tag_type) GetProcAddress(library, "census_context_next_tag");
+  census_context_get_tag_import = (census_context_get_tag_type) GetProcAddress(library, "census_context_get_tag");
+  census_context_encode_import = (census_context_encode_type) GetProcAddress(library, "census_context_encode");
+  census_context_decode_import = (census_context_decode_type) GetProcAddress(library, "census_context_decode");
+  census_trace_mask_import = (census_trace_mask_type) GetProcAddress(library, "census_trace_mask");
+  census_set_trace_mask_import = (census_set_trace_mask_type) GetProcAddress(library, "census_set_trace_mask");
+  census_start_rpc_op_timestamp_import = (census_start_rpc_op_timestamp_type) GetProcAddress(library, "census_start_rpc_op_timestamp");
+  census_start_client_rpc_op_import = (census_start_client_rpc_op_type) GetProcAddress(library, "census_start_client_rpc_op");
+  census_set_rpc_client_peer_import = (census_set_rpc_client_peer_type) GetProcAddress(library, "census_set_rpc_client_peer");
+  census_start_server_rpc_op_import = (census_start_server_rpc_op_type) GetProcAddress(library, "census_start_server_rpc_op");
+  census_start_op_import = (census_start_op_type) GetProcAddress(library, "census_start_op");
+  census_end_op_import = (census_end_op_type) GetProcAddress(library, "census_end_op");
+  census_trace_print_import = (census_trace_print_type) GetProcAddress(library, "census_trace_print");
+  census_trace_scan_start_import = (census_trace_scan_start_type) GetProcAddress(library, "census_trace_scan_start");
+  census_get_trace_record_import = (census_get_trace_record_type) GetProcAddress(library, "census_get_trace_record");
+  census_trace_scan_end_import = (census_trace_scan_end_type) GetProcAddress(library, "census_trace_scan_end");
+  census_record_values_import = (census_record_values_type) GetProcAddress(library, "census_record_values");
+  census_view_create_import = (census_view_create_type) GetProcAddress(library, "census_view_create");
+  census_view_delete_import = (census_view_delete_type) GetProcAddress(library, "census_view_delete");
+  census_view_metric_import = (census_view_metric_type) GetProcAddress(library, "census_view_metric");
+  census_view_naggregations_import = (census_view_naggregations_type) GetProcAddress(library, "census_view_naggregations");
+  census_view_tags_import = (census_view_tags_type) GetProcAddress(library, "census_view_tags");
+  census_view_aggregrations_import = (census_view_aggregrations_type) GetProcAddress(library, "census_view_aggregrations");
+  census_view_get_data_import = (census_view_get_data_type) GetProcAddress(library, "census_view_get_data");
+  census_view_reset_import = (census_view_reset_type) GetProcAddress(library, "census_view_reset");
+  grpc_compression_algorithm_parse_import = (grpc_compression_algorithm_parse_type) GetProcAddress(library, "grpc_compression_algorithm_parse");
+  grpc_compression_algorithm_name_import = (grpc_compression_algorithm_name_type) GetProcAddress(library, "grpc_compression_algorithm_name");
+  grpc_compression_algorithm_for_level_import = (grpc_compression_algorithm_for_level_type) GetProcAddress(library, "grpc_compression_algorithm_for_level");
+  grpc_compression_options_init_import = (grpc_compression_options_init_type) GetProcAddress(library, "grpc_compression_options_init");
+  grpc_compression_options_enable_algorithm_import = (grpc_compression_options_enable_algorithm_type) GetProcAddress(library, "grpc_compression_options_enable_algorithm");
+  grpc_compression_options_disable_algorithm_import = (grpc_compression_options_disable_algorithm_type) GetProcAddress(library, "grpc_compression_options_disable_algorithm");
+  grpc_compression_options_is_algorithm_enabled_import = (grpc_compression_options_is_algorithm_enabled_type) GetProcAddress(library, "grpc_compression_options_is_algorithm_enabled");
+  grpc_metadata_array_init_import = (grpc_metadata_array_init_type) GetProcAddress(library, "grpc_metadata_array_init");
+  grpc_metadata_array_destroy_import = (grpc_metadata_array_destroy_type) GetProcAddress(library, "grpc_metadata_array_destroy");
+  grpc_call_details_init_import = (grpc_call_details_init_type) GetProcAddress(library, "grpc_call_details_init");
+  grpc_call_details_destroy_import = (grpc_call_details_destroy_type) GetProcAddress(library, "grpc_call_details_destroy");
+  grpc_register_plugin_import = (grpc_register_plugin_type) GetProcAddress(library, "grpc_register_plugin");
+  grpc_init_import = (grpc_init_type) GetProcAddress(library, "grpc_init");
+  grpc_shutdown_import = (grpc_shutdown_type) GetProcAddress(library, "grpc_shutdown");
+  grpc_version_string_import = (grpc_version_string_type) GetProcAddress(library, "grpc_version_string");
+  grpc_completion_queue_create_import = (grpc_completion_queue_create_type) GetProcAddress(library, "grpc_completion_queue_create");
+  grpc_completion_queue_next_import = (grpc_completion_queue_next_type) GetProcAddress(library, "grpc_completion_queue_next");
+  grpc_completion_queue_pluck_import = (grpc_completion_queue_pluck_type) GetProcAddress(library, "grpc_completion_queue_pluck");
+  grpc_completion_queue_shutdown_import = (grpc_completion_queue_shutdown_type) GetProcAddress(library, "grpc_completion_queue_shutdown");
+  grpc_completion_queue_destroy_import = (grpc_completion_queue_destroy_type) GetProcAddress(library, "grpc_completion_queue_destroy");
+  grpc_alarm_create_import = (grpc_alarm_create_type) GetProcAddress(library, "grpc_alarm_create");
+  grpc_alarm_cancel_import = (grpc_alarm_cancel_type) GetProcAddress(library, "grpc_alarm_cancel");
+  grpc_alarm_destroy_import = (grpc_alarm_destroy_type) GetProcAddress(library, "grpc_alarm_destroy");
+  grpc_channel_check_connectivity_state_import = (grpc_channel_check_connectivity_state_type) GetProcAddress(library, "grpc_channel_check_connectivity_state");
+  grpc_channel_watch_connectivity_state_import = (grpc_channel_watch_connectivity_state_type) GetProcAddress(library, "grpc_channel_watch_connectivity_state");
+  grpc_channel_create_call_import = (grpc_channel_create_call_type) GetProcAddress(library, "grpc_channel_create_call");
+  grpc_channel_ping_import = (grpc_channel_ping_type) GetProcAddress(library, "grpc_channel_ping");
+  grpc_channel_register_call_import = (grpc_channel_register_call_type) GetProcAddress(library, "grpc_channel_register_call");
+  grpc_channel_create_registered_call_import = (grpc_channel_create_registered_call_type) GetProcAddress(library, "grpc_channel_create_registered_call");
+  grpc_call_start_batch_import = (grpc_call_start_batch_type) GetProcAddress(library, "grpc_call_start_batch");
+  grpc_call_get_peer_import = (grpc_call_get_peer_type) GetProcAddress(library, "grpc_call_get_peer");
+  grpc_census_call_set_context_import = (grpc_census_call_set_context_type) GetProcAddress(library, "grpc_census_call_set_context");
+  grpc_census_call_get_context_import = (grpc_census_call_get_context_type) GetProcAddress(library, "grpc_census_call_get_context");
+  grpc_channel_get_target_import = (grpc_channel_get_target_type) GetProcAddress(library, "grpc_channel_get_target");
+  grpc_insecure_channel_create_import = (grpc_insecure_channel_create_type) GetProcAddress(library, "grpc_insecure_channel_create");
+  grpc_lame_client_channel_create_import = (grpc_lame_client_channel_create_type) GetProcAddress(library, "grpc_lame_client_channel_create");
+  grpc_channel_destroy_import = (grpc_channel_destroy_type) GetProcAddress(library, "grpc_channel_destroy");
+  grpc_call_cancel_import = (grpc_call_cancel_type) GetProcAddress(library, "grpc_call_cancel");
+  grpc_call_cancel_with_status_import = (grpc_call_cancel_with_status_type) GetProcAddress(library, "grpc_call_cancel_with_status");
+  grpc_call_destroy_import = (grpc_call_destroy_type) GetProcAddress(library, "grpc_call_destroy");
+  grpc_server_request_call_import = (grpc_server_request_call_type) GetProcAddress(library, "grpc_server_request_call");
+  grpc_server_register_method_import = (grpc_server_register_method_type) GetProcAddress(library, "grpc_server_register_method");
+  grpc_server_request_registered_call_import = (grpc_server_request_registered_call_type) GetProcAddress(library, "grpc_server_request_registered_call");
+  grpc_server_create_import = (grpc_server_create_type) GetProcAddress(library, "grpc_server_create");
+  grpc_server_register_completion_queue_import = (grpc_server_register_completion_queue_type) GetProcAddress(library, "grpc_server_register_completion_queue");
+  grpc_server_add_insecure_http2_port_import = (grpc_server_add_insecure_http2_port_type) GetProcAddress(library, "grpc_server_add_insecure_http2_port");
+  grpc_server_start_import = (grpc_server_start_type) GetProcAddress(library, "grpc_server_start");
+  grpc_server_shutdown_and_notify_import = (grpc_server_shutdown_and_notify_type) GetProcAddress(library, "grpc_server_shutdown_and_notify");
+  grpc_server_cancel_all_calls_import = (grpc_server_cancel_all_calls_type) GetProcAddress(library, "grpc_server_cancel_all_calls");
+  grpc_server_destroy_import = (grpc_server_destroy_type) GetProcAddress(library, "grpc_server_destroy");
+  grpc_tracer_set_enabled_import = (grpc_tracer_set_enabled_type) GetProcAddress(library, "grpc_tracer_set_enabled");
+  grpc_header_key_is_legal_import = (grpc_header_key_is_legal_type) GetProcAddress(library, "grpc_header_key_is_legal");
+  grpc_header_nonbin_value_is_legal_import = (grpc_header_nonbin_value_is_legal_type) GetProcAddress(library, "grpc_header_nonbin_value_is_legal");
+  grpc_is_binary_header_import = (grpc_is_binary_header_type) GetProcAddress(library, "grpc_is_binary_header");
+  grpc_auth_property_iterator_next_import = (grpc_auth_property_iterator_next_type) GetProcAddress(library, "grpc_auth_property_iterator_next");
+  grpc_auth_context_property_iterator_import = (grpc_auth_context_property_iterator_type) GetProcAddress(library, "grpc_auth_context_property_iterator");
+  grpc_auth_context_peer_identity_import = (grpc_auth_context_peer_identity_type) GetProcAddress(library, "grpc_auth_context_peer_identity");
+  grpc_auth_context_find_properties_by_name_import = (grpc_auth_context_find_properties_by_name_type) GetProcAddress(library, "grpc_auth_context_find_properties_by_name");
+  grpc_auth_context_peer_identity_property_name_import = (grpc_auth_context_peer_identity_property_name_type) GetProcAddress(library, "grpc_auth_context_peer_identity_property_name");
+  grpc_auth_context_peer_is_authenticated_import = (grpc_auth_context_peer_is_authenticated_type) GetProcAddress(library, "grpc_auth_context_peer_is_authenticated");
+  grpc_call_auth_context_import = (grpc_call_auth_context_type) GetProcAddress(library, "grpc_call_auth_context");
+  grpc_auth_context_release_import = (grpc_auth_context_release_type) GetProcAddress(library, "grpc_auth_context_release");
+  grpc_auth_context_add_property_import = (grpc_auth_context_add_property_type) GetProcAddress(library, "grpc_auth_context_add_property");
+  grpc_auth_context_add_cstring_property_import = (grpc_auth_context_add_cstring_property_type) GetProcAddress(library, "grpc_auth_context_add_cstring_property");
+  grpc_auth_context_set_peer_identity_property_name_import = (grpc_auth_context_set_peer_identity_property_name_type) GetProcAddress(library, "grpc_auth_context_set_peer_identity_property_name");
+  grpc_channel_credentials_release_import = (grpc_channel_credentials_release_type) GetProcAddress(library, "grpc_channel_credentials_release");
+  grpc_google_default_credentials_create_import = (grpc_google_default_credentials_create_type) GetProcAddress(library, "grpc_google_default_credentials_create");
+  grpc_ssl_credentials_create_import = (grpc_ssl_credentials_create_type) GetProcAddress(library, "grpc_ssl_credentials_create");
+  grpc_call_credentials_release_import = (grpc_call_credentials_release_type) GetProcAddress(library, "grpc_call_credentials_release");
+  grpc_composite_channel_credentials_create_import = (grpc_composite_channel_credentials_create_type) GetProcAddress(library, "grpc_composite_channel_credentials_create");
+  grpc_composite_call_credentials_create_import = (grpc_composite_call_credentials_create_type) GetProcAddress(library, "grpc_composite_call_credentials_create");
+  grpc_google_compute_engine_credentials_create_import = (grpc_google_compute_engine_credentials_create_type) GetProcAddress(library, "grpc_google_compute_engine_credentials_create");
+  grpc_max_auth_token_lifetime_import = (grpc_max_auth_token_lifetime_type) GetProcAddress(library, "grpc_max_auth_token_lifetime");
+  grpc_service_account_jwt_access_credentials_create_import = (grpc_service_account_jwt_access_credentials_create_type) GetProcAddress(library, "grpc_service_account_jwt_access_credentials_create");
+  grpc_google_refresh_token_credentials_create_import = (grpc_google_refresh_token_credentials_create_type) GetProcAddress(library, "grpc_google_refresh_token_credentials_create");
+  grpc_access_token_credentials_create_import = (grpc_access_token_credentials_create_type) GetProcAddress(library, "grpc_access_token_credentials_create");
+  grpc_google_iam_credentials_create_import = (grpc_google_iam_credentials_create_type) GetProcAddress(library, "grpc_google_iam_credentials_create");
+  grpc_metadata_credentials_create_from_plugin_import = (grpc_metadata_credentials_create_from_plugin_type) GetProcAddress(library, "grpc_metadata_credentials_create_from_plugin");
+  grpc_secure_channel_create_import = (grpc_secure_channel_create_type) GetProcAddress(library, "grpc_secure_channel_create");
+  grpc_server_credentials_release_import = (grpc_server_credentials_release_type) GetProcAddress(library, "grpc_server_credentials_release");
+  grpc_ssl_server_credentials_create_import = (grpc_ssl_server_credentials_create_type) GetProcAddress(library, "grpc_ssl_server_credentials_create");
+  grpc_server_add_secure_http2_port_import = (grpc_server_add_secure_http2_port_type) GetProcAddress(library, "grpc_server_add_secure_http2_port");
+  grpc_call_set_credentials_import = (grpc_call_set_credentials_type) GetProcAddress(library, "grpc_call_set_credentials");
+  grpc_server_credentials_set_auth_metadata_processor_import = (grpc_server_credentials_set_auth_metadata_processor_type) GetProcAddress(library, "grpc_server_credentials_set_auth_metadata_processor");
+  gpr_malloc_import = (gpr_malloc_type) GetProcAddress(library, "gpr_malloc");
+  gpr_free_import = (gpr_free_type) GetProcAddress(library, "gpr_free");
+  gpr_realloc_import = (gpr_realloc_type) GetProcAddress(library, "gpr_realloc");
+  gpr_malloc_aligned_import = (gpr_malloc_aligned_type) GetProcAddress(library, "gpr_malloc_aligned");
+  gpr_free_aligned_import = (gpr_free_aligned_type) GetProcAddress(library, "gpr_free_aligned");
+  gpr_set_allocation_functions_import = (gpr_set_allocation_functions_type) GetProcAddress(library, "gpr_set_allocation_functions");
+  gpr_get_allocation_functions_import = (gpr_get_allocation_functions_type) GetProcAddress(library, "gpr_get_allocation_functions");
+  grpc_raw_byte_buffer_create_import = (grpc_raw_byte_buffer_create_type) GetProcAddress(library, "grpc_raw_byte_buffer_create");
+  grpc_raw_compressed_byte_buffer_create_import = (grpc_raw_compressed_byte_buffer_create_type) GetProcAddress(library, "grpc_raw_compressed_byte_buffer_create");
+  grpc_byte_buffer_copy_import = (grpc_byte_buffer_copy_type) GetProcAddress(library, "grpc_byte_buffer_copy");
+  grpc_byte_buffer_length_import = (grpc_byte_buffer_length_type) GetProcAddress(library, "grpc_byte_buffer_length");
+  grpc_byte_buffer_destroy_import = (grpc_byte_buffer_destroy_type) GetProcAddress(library, "grpc_byte_buffer_destroy");
+  grpc_byte_buffer_reader_init_import = (grpc_byte_buffer_reader_init_type) GetProcAddress(library, "grpc_byte_buffer_reader_init");
+  grpc_byte_buffer_reader_destroy_import = (grpc_byte_buffer_reader_destroy_type) GetProcAddress(library, "grpc_byte_buffer_reader_destroy");
+  grpc_byte_buffer_reader_next_import = (grpc_byte_buffer_reader_next_type) GetProcAddress(library, "grpc_byte_buffer_reader_next");
+  grpc_byte_buffer_reader_readall_import = (grpc_byte_buffer_reader_readall_type) GetProcAddress(library, "grpc_byte_buffer_reader_readall");
+  grpc_raw_byte_buffer_from_reader_import = (grpc_raw_byte_buffer_from_reader_type) GetProcAddress(library, "grpc_raw_byte_buffer_from_reader");
+  gpr_log_import = (gpr_log_type) GetProcAddress(library, "gpr_log");
+  gpr_log_message_import = (gpr_log_message_type) GetProcAddress(library, "gpr_log_message");
+  gpr_set_log_function_import = (gpr_set_log_function_type) GetProcAddress(library, "gpr_set_log_function");
+  gpr_slice_ref_import = (gpr_slice_ref_type) GetProcAddress(library, "gpr_slice_ref");
+  gpr_slice_unref_import = (gpr_slice_unref_type) GetProcAddress(library, "gpr_slice_unref");
+  gpr_slice_new_import = (gpr_slice_new_type) GetProcAddress(library, "gpr_slice_new");
+  gpr_slice_new_with_len_import = (gpr_slice_new_with_len_type) GetProcAddress(library, "gpr_slice_new_with_len");
+  gpr_slice_malloc_import = (gpr_slice_malloc_type) GetProcAddress(library, "gpr_slice_malloc");
+  gpr_slice_from_copied_string_import = (gpr_slice_from_copied_string_type) GetProcAddress(library, "gpr_slice_from_copied_string");
+  gpr_slice_from_copied_buffer_import = (gpr_slice_from_copied_buffer_type) GetProcAddress(library, "gpr_slice_from_copied_buffer");
+  gpr_slice_from_static_string_import = (gpr_slice_from_static_string_type) GetProcAddress(library, "gpr_slice_from_static_string");
+  gpr_slice_sub_import = (gpr_slice_sub_type) GetProcAddress(library, "gpr_slice_sub");
+  gpr_slice_sub_no_ref_import = (gpr_slice_sub_no_ref_type) GetProcAddress(library, "gpr_slice_sub_no_ref");
+  gpr_slice_split_tail_import = (gpr_slice_split_tail_type) GetProcAddress(library, "gpr_slice_split_tail");
+  gpr_slice_split_head_import = (gpr_slice_split_head_type) GetProcAddress(library, "gpr_slice_split_head");
+  gpr_empty_slice_import = (gpr_empty_slice_type) GetProcAddress(library, "gpr_empty_slice");
+  gpr_slice_cmp_import = (gpr_slice_cmp_type) GetProcAddress(library, "gpr_slice_cmp");
+  gpr_slice_str_cmp_import = (gpr_slice_str_cmp_type) GetProcAddress(library, "gpr_slice_str_cmp");
+  gpr_slice_buffer_init_import = (gpr_slice_buffer_init_type) GetProcAddress(library, "gpr_slice_buffer_init");
+  gpr_slice_buffer_destroy_import = (gpr_slice_buffer_destroy_type) GetProcAddress(library, "gpr_slice_buffer_destroy");
+  gpr_slice_buffer_add_import = (gpr_slice_buffer_add_type) GetProcAddress(library, "gpr_slice_buffer_add");
+  gpr_slice_buffer_add_indexed_import = (gpr_slice_buffer_add_indexed_type) GetProcAddress(library, "gpr_slice_buffer_add_indexed");
+  gpr_slice_buffer_addn_import = (gpr_slice_buffer_addn_type) GetProcAddress(library, "gpr_slice_buffer_addn");
+  gpr_slice_buffer_tiny_add_import = (gpr_slice_buffer_tiny_add_type) GetProcAddress(library, "gpr_slice_buffer_tiny_add");
+  gpr_slice_buffer_pop_import = (gpr_slice_buffer_pop_type) GetProcAddress(library, "gpr_slice_buffer_pop");
+  gpr_slice_buffer_reset_and_unref_import = (gpr_slice_buffer_reset_and_unref_type) GetProcAddress(library, "gpr_slice_buffer_reset_and_unref");
+  gpr_slice_buffer_swap_import = (gpr_slice_buffer_swap_type) GetProcAddress(library, "gpr_slice_buffer_swap");
+  gpr_slice_buffer_move_into_import = (gpr_slice_buffer_move_into_type) GetProcAddress(library, "gpr_slice_buffer_move_into");
+  gpr_slice_buffer_trim_end_import = (gpr_slice_buffer_trim_end_type) GetProcAddress(library, "gpr_slice_buffer_trim_end");
+  gpr_slice_buffer_move_first_import = (gpr_slice_buffer_move_first_type) GetProcAddress(library, "gpr_slice_buffer_move_first");
+  gpr_slice_buffer_take_first_import = (gpr_slice_buffer_take_first_type) GetProcAddress(library, "gpr_slice_buffer_take_first");
+  gpr_mu_init_import = (gpr_mu_init_type) GetProcAddress(library, "gpr_mu_init");
+  gpr_mu_destroy_import = (gpr_mu_destroy_type) GetProcAddress(library, "gpr_mu_destroy");
+  gpr_mu_lock_import = (gpr_mu_lock_type) GetProcAddress(library, "gpr_mu_lock");
+  gpr_mu_unlock_import = (gpr_mu_unlock_type) GetProcAddress(library, "gpr_mu_unlock");
+  gpr_mu_trylock_import = (gpr_mu_trylock_type) GetProcAddress(library, "gpr_mu_trylock");
+  gpr_cv_init_import = (gpr_cv_init_type) GetProcAddress(library, "gpr_cv_init");
+  gpr_cv_destroy_import = (gpr_cv_destroy_type) GetProcAddress(library, "gpr_cv_destroy");
+  gpr_cv_wait_import = (gpr_cv_wait_type) GetProcAddress(library, "gpr_cv_wait");
+  gpr_cv_signal_import = (gpr_cv_signal_type) GetProcAddress(library, "gpr_cv_signal");
+  gpr_cv_broadcast_import = (gpr_cv_broadcast_type) GetProcAddress(library, "gpr_cv_broadcast");
+  gpr_once_init_import = (gpr_once_init_type) GetProcAddress(library, "gpr_once_init");
+  gpr_event_init_import = (gpr_event_init_type) GetProcAddress(library, "gpr_event_init");
+  gpr_event_set_import = (gpr_event_set_type) GetProcAddress(library, "gpr_event_set");
+  gpr_event_get_import = (gpr_event_get_type) GetProcAddress(library, "gpr_event_get");
+  gpr_event_wait_import = (gpr_event_wait_type) GetProcAddress(library, "gpr_event_wait");
+  gpr_ref_init_import = (gpr_ref_init_type) GetProcAddress(library, "gpr_ref_init");
+  gpr_ref_import = (gpr_ref_type) GetProcAddress(library, "gpr_ref");
+  gpr_refn_import = (gpr_refn_type) GetProcAddress(library, "gpr_refn");
+  gpr_unref_import = (gpr_unref_type) GetProcAddress(library, "gpr_unref");
+  gpr_stats_init_import = (gpr_stats_init_type) GetProcAddress(library, "gpr_stats_init");
+  gpr_stats_inc_import = (gpr_stats_inc_type) GetProcAddress(library, "gpr_stats_inc");
+  gpr_stats_read_import = (gpr_stats_read_type) GetProcAddress(library, "gpr_stats_read");
+  gpr_time_0_import = (gpr_time_0_type) GetProcAddress(library, "gpr_time_0");
+  gpr_inf_future_import = (gpr_inf_future_type) GetProcAddress(library, "gpr_inf_future");
+  gpr_inf_past_import = (gpr_inf_past_type) GetProcAddress(library, "gpr_inf_past");
+  gpr_time_init_import = (gpr_time_init_type) GetProcAddress(library, "gpr_time_init");
+  gpr_now_import = (gpr_now_type) GetProcAddress(library, "gpr_now");
+  gpr_convert_clock_type_import = (gpr_convert_clock_type_type) GetProcAddress(library, "gpr_convert_clock_type");
+  gpr_time_cmp_import = (gpr_time_cmp_type) GetProcAddress(library, "gpr_time_cmp");
+  gpr_time_max_import = (gpr_time_max_type) GetProcAddress(library, "gpr_time_max");
+  gpr_time_min_import = (gpr_time_min_type) GetProcAddress(library, "gpr_time_min");
+  gpr_time_add_import = (gpr_time_add_type) GetProcAddress(library, "gpr_time_add");
+  gpr_time_sub_import = (gpr_time_sub_type) GetProcAddress(library, "gpr_time_sub");
+  gpr_time_from_micros_import = (gpr_time_from_micros_type) GetProcAddress(library, "gpr_time_from_micros");
+  gpr_time_from_nanos_import = (gpr_time_from_nanos_type) GetProcAddress(library, "gpr_time_from_nanos");
+  gpr_time_from_millis_import = (gpr_time_from_millis_type) GetProcAddress(library, "gpr_time_from_millis");
+  gpr_time_from_seconds_import = (gpr_time_from_seconds_type) GetProcAddress(library, "gpr_time_from_seconds");
+  gpr_time_from_minutes_import = (gpr_time_from_minutes_type) GetProcAddress(library, "gpr_time_from_minutes");
+  gpr_time_from_hours_import = (gpr_time_from_hours_type) GetProcAddress(library, "gpr_time_from_hours");
+  gpr_time_to_millis_import = (gpr_time_to_millis_type) GetProcAddress(library, "gpr_time_to_millis");
+  gpr_time_similar_import = (gpr_time_similar_type) GetProcAddress(library, "gpr_time_similar");
+  gpr_sleep_until_import = (gpr_sleep_until_type) GetProcAddress(library, "gpr_sleep_until");
+  gpr_timespec_to_micros_import = (gpr_timespec_to_micros_type) GetProcAddress(library, "gpr_timespec_to_micros");
+  gpr_avl_create_import = (gpr_avl_create_type) GetProcAddress(library, "gpr_avl_create");
+  gpr_avl_ref_import = (gpr_avl_ref_type) GetProcAddress(library, "gpr_avl_ref");
+  gpr_avl_unref_import = (gpr_avl_unref_type) GetProcAddress(library, "gpr_avl_unref");
+  gpr_avl_add_import = (gpr_avl_add_type) GetProcAddress(library, "gpr_avl_add");
+  gpr_avl_remove_import = (gpr_avl_remove_type) GetProcAddress(library, "gpr_avl_remove");
+  gpr_avl_get_import = (gpr_avl_get_type) GetProcAddress(library, "gpr_avl_get");
+  gpr_cmdline_create_import = (gpr_cmdline_create_type) GetProcAddress(library, "gpr_cmdline_create");
+  gpr_cmdline_add_int_import = (gpr_cmdline_add_int_type) GetProcAddress(library, "gpr_cmdline_add_int");
+  gpr_cmdline_add_flag_import = (gpr_cmdline_add_flag_type) GetProcAddress(library, "gpr_cmdline_add_flag");
+  gpr_cmdline_add_string_import = (gpr_cmdline_add_string_type) GetProcAddress(library, "gpr_cmdline_add_string");
+  gpr_cmdline_on_extra_arg_import = (gpr_cmdline_on_extra_arg_type) GetProcAddress(library, "gpr_cmdline_on_extra_arg");
+  gpr_cmdline_set_survive_failure_import = (gpr_cmdline_set_survive_failure_type) GetProcAddress(library, "gpr_cmdline_set_survive_failure");
+  gpr_cmdline_parse_import = (gpr_cmdline_parse_type) GetProcAddress(library, "gpr_cmdline_parse");
+  gpr_cmdline_destroy_import = (gpr_cmdline_destroy_type) GetProcAddress(library, "gpr_cmdline_destroy");
+  gpr_cmdline_usage_string_import = (gpr_cmdline_usage_string_type) GetProcAddress(library, "gpr_cmdline_usage_string");
+  gpr_cpu_num_cores_import = (gpr_cpu_num_cores_type) GetProcAddress(library, "gpr_cpu_num_cores");
+  gpr_cpu_current_cpu_import = (gpr_cpu_current_cpu_type) GetProcAddress(library, "gpr_cpu_current_cpu");
+  gpr_histogram_create_import = (gpr_histogram_create_type) GetProcAddress(library, "gpr_histogram_create");
+  gpr_histogram_destroy_import = (gpr_histogram_destroy_type) GetProcAddress(library, "gpr_histogram_destroy");
+  gpr_histogram_add_import = (gpr_histogram_add_type) GetProcAddress(library, "gpr_histogram_add");
+  gpr_histogram_merge_import = (gpr_histogram_merge_type) GetProcAddress(library, "gpr_histogram_merge");
+  gpr_histogram_percentile_import = (gpr_histogram_percentile_type) GetProcAddress(library, "gpr_histogram_percentile");
+  gpr_histogram_mean_import = (gpr_histogram_mean_type) GetProcAddress(library, "gpr_histogram_mean");
+  gpr_histogram_stddev_import = (gpr_histogram_stddev_type) GetProcAddress(library, "gpr_histogram_stddev");
+  gpr_histogram_variance_import = (gpr_histogram_variance_type) GetProcAddress(library, "gpr_histogram_variance");
+  gpr_histogram_maximum_import = (gpr_histogram_maximum_type) GetProcAddress(library, "gpr_histogram_maximum");
+  gpr_histogram_minimum_import = (gpr_histogram_minimum_type) GetProcAddress(library, "gpr_histogram_minimum");
+  gpr_histogram_count_import = (gpr_histogram_count_type) GetProcAddress(library, "gpr_histogram_count");
+  gpr_histogram_sum_import = (gpr_histogram_sum_type) GetProcAddress(library, "gpr_histogram_sum");
+  gpr_histogram_sum_of_squares_import = (gpr_histogram_sum_of_squares_type) GetProcAddress(library, "gpr_histogram_sum_of_squares");
+  gpr_histogram_get_contents_import = (gpr_histogram_get_contents_type) GetProcAddress(library, "gpr_histogram_get_contents");
+  gpr_histogram_merge_contents_import = (gpr_histogram_merge_contents_type) GetProcAddress(library, "gpr_histogram_merge_contents");
+  gpr_join_host_port_import = (gpr_join_host_port_type) GetProcAddress(library, "gpr_join_host_port");
+  gpr_split_host_port_import = (gpr_split_host_port_type) GetProcAddress(library, "gpr_split_host_port");
+  gpr_format_message_import = (gpr_format_message_type) GetProcAddress(library, "gpr_format_message");
+  gpr_strdup_import = (gpr_strdup_type) GetProcAddress(library, "gpr_strdup");
+  gpr_asprintf_import = (gpr_asprintf_type) GetProcAddress(library, "gpr_asprintf");
+  gpr_subprocess_binary_extension_import = (gpr_subprocess_binary_extension_type) GetProcAddress(library, "gpr_subprocess_binary_extension");
+  gpr_subprocess_create_import = (gpr_subprocess_create_type) GetProcAddress(library, "gpr_subprocess_create");
+  gpr_subprocess_destroy_import = (gpr_subprocess_destroy_type) GetProcAddress(library, "gpr_subprocess_destroy");
+  gpr_subprocess_join_import = (gpr_subprocess_join_type) GetProcAddress(library, "gpr_subprocess_join");
+  gpr_subprocess_interrupt_import = (gpr_subprocess_interrupt_type) GetProcAddress(library, "gpr_subprocess_interrupt");
+  gpr_thd_new_import = (gpr_thd_new_type) GetProcAddress(library, "gpr_thd_new");
+  gpr_thd_options_default_import = (gpr_thd_options_default_type) GetProcAddress(library, "gpr_thd_options_default");
+  gpr_thd_options_set_detached_import = (gpr_thd_options_set_detached_type) GetProcAddress(library, "gpr_thd_options_set_detached");
+  gpr_thd_options_set_joinable_import = (gpr_thd_options_set_joinable_type) GetProcAddress(library, "gpr_thd_options_set_joinable");
+  gpr_thd_options_is_detached_import = (gpr_thd_options_is_detached_type) GetProcAddress(library, "gpr_thd_options_is_detached");
+  gpr_thd_options_is_joinable_import = (gpr_thd_options_is_joinable_type) GetProcAddress(library, "gpr_thd_options_is_joinable");
+  gpr_thd_currentid_import = (gpr_thd_currentid_type) GetProcAddress(library, "gpr_thd_currentid");
+  gpr_thd_join_import = (gpr_thd_join_type) GetProcAddress(library, "gpr_thd_join");
+}
+
+#endif /* !GPR_WIN32 */
diff --git a/src/python/grpcio/grpc/_cython/imports.generated.h b/src/python/grpcio/grpc/_cython/imports.generated.h
new file mode 100644
index 0000000000..f85d416db8
--- /dev/null
+++ b/src/python/grpcio/grpc/_cython/imports.generated.h
@@ -0,0 +1,854 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef PYGRPC_CYTHON_WINDOWS_IMPORTS_H_
+#define PYGRPC_CYTHON_WINDOWS_IMPORTS_H_
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WIN32
+
+#include <windows.h>
+
+#include <grpc/census.h>
+#include <grpc/compression.h>
+#include <grpc/grpc.h>
+#include <grpc/grpc_security.h>
+#include <grpc/impl/codegen/alloc.h>
+#include <grpc/impl/codegen/byte_buffer.h>
+#include <grpc/impl/codegen/log.h>
+#include <grpc/impl/codegen/slice.h>
+#include <grpc/impl/codegen/slice_buffer.h>
+#include <grpc/impl/codegen/sync.h>
+#include <grpc/impl/codegen/time.h>
+#include <grpc/support/avl.h>
+#include <grpc/support/cmdline.h>
+#include <grpc/support/cpu.h>
+#include <grpc/support/histogram.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log_win32.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/subprocess.h>
+#include <grpc/support/thd.h>
+
+typedef int(*census_initialize_type)(int features);
+extern census_initialize_type census_initialize_import;
+#define census_initialize census_initialize_import
+typedef void(*census_shutdown_type)(void);
+extern census_shutdown_type census_shutdown_import;
+#define census_shutdown census_shutdown_import
+typedef int(*census_supported_type)(void);
+extern census_supported_type census_supported_import;
+#define census_supported census_supported_import
+typedef int(*census_enabled_type)(void);
+extern census_enabled_type census_enabled_import;
+#define census_enabled census_enabled_import
+typedef census_context *(*census_context_create_type)(const census_context *base, const census_tag *tags, int ntags, census_context_status const **status);
+extern census_context_create_type census_context_create_import;
+#define census_context_create census_context_create_import
+typedef void(*census_context_destroy_type)(census_context *context);
+extern census_context_destroy_type census_context_destroy_import;
+#define census_context_destroy census_context_destroy_import
+typedef const census_context_status *(*census_context_get_status_type)(const census_context *context);
+extern census_context_get_status_type census_context_get_status_import;
+#define census_context_get_status census_context_get_status_import
+typedef void(*census_context_initialize_iterator_type)(const census_context *context, census_context_iterator *iterator);
+extern census_context_initialize_iterator_type census_context_initialize_iterator_import;
+#define census_context_initialize_iterator census_context_initialize_iterator_import
+typedef int(*census_context_next_tag_type)(census_context_iterator *iterator, census_tag *tag);
+extern census_context_next_tag_type census_context_next_tag_import;
+#define census_context_next_tag census_context_next_tag_import
+typedef int(*census_context_get_tag_type)(const census_context *context, const char *key, census_tag *tag);
+extern census_context_get_tag_type census_context_get_tag_import;
+#define census_context_get_tag census_context_get_tag_import
+typedef char *(*census_context_encode_type)(const census_context *context, char *buffer, size_t buf_size, size_t *print_buf_size, size_t *bin_buf_size);
+extern census_context_encode_type census_context_encode_import;
+#define census_context_encode census_context_encode_import
+typedef census_context *(*census_context_decode_type)(const char *buffer, size_t size, const char *bin_buffer, size_t bin_size);
+extern census_context_decode_type census_context_decode_import;
+#define census_context_decode census_context_decode_import
+typedef int(*census_trace_mask_type)(const census_context *context);
+extern census_trace_mask_type census_trace_mask_import;
+#define census_trace_mask census_trace_mask_import
+typedef void(*census_set_trace_mask_type)(int trace_mask);
+extern census_set_trace_mask_type census_set_trace_mask_import;
+#define census_set_trace_mask census_set_trace_mask_import
+typedef census_timestamp(*census_start_rpc_op_timestamp_type)(void);
+extern census_start_rpc_op_timestamp_type census_start_rpc_op_timestamp_import;
+#define census_start_rpc_op_timestamp census_start_rpc_op_timestamp_import
+typedef census_context *(*census_start_client_rpc_op_type)(const census_context *context, int64_t rpc_name_id, const census_rpc_name_info *rpc_name_info, const char *peer, int trace_mask, const census_timestamp *start_time);
+extern census_start_client_rpc_op_type census_start_client_rpc_op_import;
+#define census_start_client_rpc_op census_start_client_rpc_op_import
+typedef void(*census_set_rpc_client_peer_type)(census_context *context, const char *peer);
+extern census_set_rpc_client_peer_type census_set_rpc_client_peer_import;
+#define census_set_rpc_client_peer census_set_rpc_client_peer_import
+typedef census_context *(*census_start_server_rpc_op_type)(const char *buffer, int64_t rpc_name_id, const census_rpc_name_info *rpc_name_info, const char *peer, int trace_mask, census_timestamp *start_time);
+extern census_start_server_rpc_op_type census_start_server_rpc_op_import;
+#define census_start_server_rpc_op census_start_server_rpc_op_import
+typedef census_context *(*census_start_op_type)(census_context *context, const char *family, const char *name, int trace_mask);
+extern census_start_op_type census_start_op_import;
+#define census_start_op census_start_op_import
+typedef void(*census_end_op_type)(census_context *context, int status);
+extern census_end_op_type census_end_op_import;
+#define census_end_op census_end_op_import
+typedef void(*census_trace_print_type)(census_context *context, uint32_t type, const char *buffer, size_t n);
+extern census_trace_print_type census_trace_print_import;
+#define census_trace_print census_trace_print_import
+typedef int(*census_trace_scan_start_type)(int consume);
+extern census_trace_scan_start_type census_trace_scan_start_import;
+#define census_trace_scan_start census_trace_scan_start_import
+typedef int(*census_get_trace_record_type)(census_trace_record *trace_record);
+extern census_get_trace_record_type census_get_trace_record_import;
+#define census_get_trace_record census_get_trace_record_import
+typedef void(*census_trace_scan_end_type)();
+extern census_trace_scan_end_type census_trace_scan_end_import;
+#define census_trace_scan_end census_trace_scan_end_import
+typedef void(*census_record_values_type)(census_context *context, census_value *values, size_t nvalues);
+extern census_record_values_type census_record_values_import;
+#define census_record_values census_record_values_import
+typedef census_view *(*census_view_create_type)(uint32_t metric_id, const census_context *tags, const census_aggregation *aggregations, size_t naggregations);
+extern census_view_create_type census_view_create_import;
+#define census_view_create census_view_create_import
+typedef void(*census_view_delete_type)(census_view *view);
+extern census_view_delete_type census_view_delete_import;
+#define census_view_delete census_view_delete_import
+typedef size_t(*census_view_metric_type)(const census_view *view);
+extern census_view_metric_type census_view_metric_import;
+#define census_view_metric census_view_metric_import
+typedef size_t(*census_view_naggregations_type)(const census_view *view);
+extern census_view_naggregations_type census_view_naggregations_import;
+#define census_view_naggregations census_view_naggregations_import
+typedef const census_context *(*census_view_tags_type)(const census_view *view);
+extern census_view_tags_type census_view_tags_import;
+#define census_view_tags census_view_tags_import
+typedef const census_aggregation *(*census_view_aggregrations_type)(const census_view *view);
+extern census_view_aggregrations_type census_view_aggregrations_import;
+#define census_view_aggregrations census_view_aggregrations_import
+typedef const census_view_data *(*census_view_get_data_type)(const census_view *view);
+extern census_view_get_data_type census_view_get_data_import;
+#define census_view_get_data census_view_get_data_import
+typedef void(*census_view_reset_type)(census_view *view);
+extern census_view_reset_type census_view_reset_import;
+#define census_view_reset census_view_reset_import
+typedef int(*grpc_compression_algorithm_parse_type)(const char *name, size_t name_length, grpc_compression_algorithm *algorithm);
+extern grpc_compression_algorithm_parse_type grpc_compression_algorithm_parse_import;
+#define grpc_compression_algorithm_parse grpc_compression_algorithm_parse_import
+typedef int(*grpc_compression_algorithm_name_type)(grpc_compression_algorithm algorithm, char **name);
+extern grpc_compression_algorithm_name_type grpc_compression_algorithm_name_import;
+#define grpc_compression_algorithm_name grpc_compression_algorithm_name_import
+typedef grpc_compression_algorithm(*grpc_compression_algorithm_for_level_type)(grpc_compression_level level);
+extern grpc_compression_algorithm_for_level_type grpc_compression_algorithm_for_level_import;
+#define grpc_compression_algorithm_for_level grpc_compression_algorithm_for_level_import
+typedef void(*grpc_compression_options_init_type)(grpc_compression_options *opts);
+extern grpc_compression_options_init_type grpc_compression_options_init_import;
+#define grpc_compression_options_init grpc_compression_options_init_import
+typedef void(*grpc_compression_options_enable_algorithm_type)(grpc_compression_options *opts, grpc_compression_algorithm algorithm);
+extern grpc_compression_options_enable_algorithm_type grpc_compression_options_enable_algorithm_import;
+#define grpc_compression_options_enable_algorithm grpc_compression_options_enable_algorithm_import
+typedef void(*grpc_compression_options_disable_algorithm_type)(grpc_compression_options *opts, grpc_compression_algorithm algorithm);
+extern grpc_compression_options_disable_algorithm_type grpc_compression_options_disable_algorithm_import;
+#define grpc_compression_options_disable_algorithm grpc_compression_options_disable_algorithm_import
+typedef int(*grpc_compression_options_is_algorithm_enabled_type)(const grpc_compression_options *opts, grpc_compression_algorithm algorithm);
+extern grpc_compression_options_is_algorithm_enabled_type grpc_compression_options_is_algorithm_enabled_import;
+#define grpc_compression_options_is_algorithm_enabled grpc_compression_options_is_algorithm_enabled_import
+typedef void(*grpc_metadata_array_init_type)(grpc_metadata_array *array);
+extern grpc_metadata_array_init_type grpc_metadata_array_init_import;
+#define grpc_metadata_array_init grpc_metadata_array_init_import
+typedef void(*grpc_metadata_array_destroy_type)(grpc_metadata_array *array);
+extern grpc_metadata_array_destroy_type grpc_metadata_array_destroy_import;
+#define grpc_metadata_array_destroy grpc_metadata_array_destroy_import
+typedef void(*grpc_call_details_init_type)(grpc_call_details *details);
+extern grpc_call_details_init_type grpc_call_details_init_import;
+#define grpc_call_details_init grpc_call_details_init_import
+typedef void(*grpc_call_details_destroy_type)(grpc_call_details *details);
+extern grpc_call_details_destroy_type grpc_call_details_destroy_import;
+#define grpc_call_details_destroy grpc_call_details_destroy_import
+typedef void(*grpc_register_plugin_type)(void (*init)(void), void (*destroy)(void));
+extern grpc_register_plugin_type grpc_register_plugin_import;
+#define grpc_register_plugin grpc_register_plugin_import
+typedef void(*grpc_init_type)(void);
+extern grpc_init_type grpc_init_import;
+#define grpc_init grpc_init_import
+typedef void(*grpc_shutdown_type)(void);
+extern grpc_shutdown_type grpc_shutdown_import;
+#define grpc_shutdown grpc_shutdown_import
+typedef const char *(*grpc_version_string_type)(void);
+extern grpc_version_string_type grpc_version_string_import;
+#define grpc_version_string grpc_version_string_import
+typedef grpc_completion_queue *(*grpc_completion_queue_create_type)(void *reserved);
+extern grpc_completion_queue_create_type grpc_completion_queue_create_import;
+#define grpc_completion_queue_create grpc_completion_queue_create_import
+typedef grpc_event(*grpc_completion_queue_next_type)(grpc_completion_queue *cq, gpr_timespec deadline, void *reserved);
+extern grpc_completion_queue_next_type grpc_completion_queue_next_import;
+#define grpc_completion_queue_next grpc_completion_queue_next_import
+typedef grpc_event(*grpc_completion_queue_pluck_type)(grpc_completion_queue *cq, void *tag, gpr_timespec deadline, void *reserved);
+extern grpc_completion_queue_pluck_type grpc_completion_queue_pluck_import;
+#define grpc_completion_queue_pluck grpc_completion_queue_pluck_import
+typedef void(*grpc_completion_queue_shutdown_type)(grpc_completion_queue *cq);
+extern grpc_completion_queue_shutdown_type grpc_completion_queue_shutdown_import;
+#define grpc_completion_queue_shutdown grpc_completion_queue_shutdown_import
+typedef void(*grpc_completion_queue_destroy_type)(grpc_completion_queue *cq);
+extern grpc_completion_queue_destroy_type grpc_completion_queue_destroy_import;
+#define grpc_completion_queue_destroy grpc_completion_queue_destroy_import
+typedef grpc_alarm *(*grpc_alarm_create_type)(grpc_completion_queue *cq, gpr_timespec deadline, void *tag);
+extern grpc_alarm_create_type grpc_alarm_create_import;
+#define grpc_alarm_create grpc_alarm_create_import
+typedef void(*grpc_alarm_cancel_type)(grpc_alarm *alarm);
+extern grpc_alarm_cancel_type grpc_alarm_cancel_import;
+#define grpc_alarm_cancel grpc_alarm_cancel_import
+typedef void(*grpc_alarm_destroy_type)(grpc_alarm *alarm);
+extern grpc_alarm_destroy_type grpc_alarm_destroy_import;
+#define grpc_alarm_destroy grpc_alarm_destroy_import
+typedef grpc_connectivity_state(*grpc_channel_check_connectivity_state_type)(grpc_channel *channel, int try_to_connect);
+extern grpc_channel_check_connectivity_state_type grpc_channel_check_connectivity_state_import;
+#define grpc_channel_check_connectivity_state grpc_channel_check_connectivity_state_import
+typedef void(*grpc_channel_watch_connectivity_state_type)(grpc_channel *channel, grpc_connectivity_state last_observed_state, gpr_timespec deadline, grpc_completion_queue *cq, void *tag);
+extern grpc_channel_watch_connectivity_state_type grpc_channel_watch_connectivity_state_import;
+#define grpc_channel_watch_connectivity_state grpc_channel_watch_connectivity_state_import
+typedef grpc_call *(*grpc_channel_create_call_type)(grpc_channel *channel, grpc_call *parent_call, uint32_t propagation_mask, grpc_completion_queue *completion_queue, const char *method, const char *host, gpr_timespec deadline, void *reserved);
+extern grpc_channel_create_call_type grpc_channel_create_call_import;
+#define grpc_channel_create_call grpc_channel_create_call_import
+typedef void(*grpc_channel_ping_type)(grpc_channel *channel, grpc_completion_queue *cq, void *tag, void *reserved);
+extern grpc_channel_ping_type grpc_channel_ping_import;
+#define grpc_channel_ping grpc_channel_ping_import
+typedef void *(*grpc_channel_register_call_type)(grpc_channel *channel, const char *method, const char *host, void *reserved);
+extern grpc_channel_register_call_type grpc_channel_register_call_import;
+#define grpc_channel_register_call grpc_channel_register_call_import
+typedef grpc_call *(*grpc_channel_create_registered_call_type)(grpc_channel *channel, grpc_call *parent_call, uint32_t propagation_mask, grpc_completion_queue *completion_queue, void *registered_call_handle, gpr_timespec deadline, void *reserved);
+extern grpc_channel_create_registered_call_type grpc_channel_create_registered_call_import;
+#define grpc_channel_create_registered_call grpc_channel_create_registered_call_import
+typedef grpc_call_error(*grpc_call_start_batch_type)(grpc_call *call, const grpc_op *ops, size_t nops, void *tag, void *reserved);
+extern grpc_call_start_batch_type grpc_call_start_batch_import;
+#define grpc_call_start_batch grpc_call_start_batch_import
+typedef char *(*grpc_call_get_peer_type)(grpc_call *call);
+extern grpc_call_get_peer_type grpc_call_get_peer_import;
+#define grpc_call_get_peer grpc_call_get_peer_import
+typedef void(*grpc_census_call_set_context_type)(grpc_call *call, struct census_context *context);
+extern grpc_census_call_set_context_type grpc_census_call_set_context_import;
+#define grpc_census_call_set_context grpc_census_call_set_context_import
+typedef struct census_context *(*grpc_census_call_get_context_type)(grpc_call *call);
+extern grpc_census_call_get_context_type grpc_census_call_get_context_import;
+#define grpc_census_call_get_context grpc_census_call_get_context_import
+typedef char *(*grpc_channel_get_target_type)(grpc_channel *channel);
+extern grpc_channel_get_target_type grpc_channel_get_target_import;
+#define grpc_channel_get_target grpc_channel_get_target_import
+typedef grpc_channel *(*grpc_insecure_channel_create_type)(const char *target, const grpc_channel_args *args, void *reserved);
+extern grpc_insecure_channel_create_type grpc_insecure_channel_create_import;
+#define grpc_insecure_channel_create grpc_insecure_channel_create_import
+typedef grpc_channel *(*grpc_lame_client_channel_create_type)(const char *target, grpc_status_code error_code, const char *error_message);
+extern grpc_lame_client_channel_create_type grpc_lame_client_channel_create_import;
+#define grpc_lame_client_channel_create grpc_lame_client_channel_create_import
+typedef void(*grpc_channel_destroy_type)(grpc_channel *channel);
+extern grpc_channel_destroy_type grpc_channel_destroy_import;
+#define grpc_channel_destroy grpc_channel_destroy_import
+typedef grpc_call_error(*grpc_call_cancel_type)(grpc_call *call, void *reserved);
+extern grpc_call_cancel_type grpc_call_cancel_import;
+#define grpc_call_cancel grpc_call_cancel_import
+typedef grpc_call_error(*grpc_call_cancel_with_status_type)(grpc_call *call, grpc_status_code status, const char *description, void *reserved);
+extern grpc_call_cancel_with_status_type grpc_call_cancel_with_status_import;
+#define grpc_call_cancel_with_status grpc_call_cancel_with_status_import
+typedef void(*grpc_call_destroy_type)(grpc_call *call);
+extern grpc_call_destroy_type grpc_call_destroy_import;
+#define grpc_call_destroy grpc_call_destroy_import
+typedef grpc_call_error(*grpc_server_request_call_type)(grpc_server *server, grpc_call **call, grpc_call_details *details, grpc_metadata_array *request_metadata, grpc_completion_queue *cq_bound_to_call, grpc_completion_queue *cq_for_notification, void *tag_new);
+extern grpc_server_request_call_type grpc_server_request_call_import;
+#define grpc_server_request_call grpc_server_request_call_import
+typedef void *(*grpc_server_register_method_type)(grpc_server *server, const char *method, const char *host);
+extern grpc_server_register_method_type grpc_server_register_method_import;
+#define grpc_server_register_method grpc_server_register_method_import
+typedef grpc_call_error(*grpc_server_request_registered_call_type)(grpc_server *server, void *registered_method, grpc_call **call, gpr_timespec *deadline, grpc_metadata_array *request_metadata, grpc_byte_buffer **optional_payload, grpc_completion_queue *cq_bound_to_call, grpc_completion_queue *cq_for_notification, void *tag_new);
+extern grpc_server_request_registered_call_type grpc_server_request_registered_call_import;
+#define grpc_server_request_registered_call grpc_server_request_registered_call_import
+typedef grpc_server *(*grpc_server_create_type)(const grpc_channel_args *args, void *reserved);
+extern grpc_server_create_type grpc_server_create_import;
+#define grpc_server_create grpc_server_create_import
+typedef void(*grpc_server_register_completion_queue_type)(grpc_server *server, grpc_completion_queue *cq, void *reserved);
+extern grpc_server_register_completion_queue_type grpc_server_register_completion_queue_import;
+#define grpc_server_register_completion_queue grpc_server_register_completion_queue_import
+typedef int(*grpc_server_add_insecure_http2_port_type)(grpc_server *server, const char *addr);
+extern grpc_server_add_insecure_http2_port_type grpc_server_add_insecure_http2_port_import;
+#define grpc_server_add_insecure_http2_port grpc_server_add_insecure_http2_port_import
+typedef void(*grpc_server_start_type)(grpc_server *server);
+extern grpc_server_start_type grpc_server_start_import;
+#define grpc_server_start grpc_server_start_import
+typedef void(*grpc_server_shutdown_and_notify_type)(grpc_server *server, grpc_completion_queue *cq, void *tag);
+extern grpc_server_shutdown_and_notify_type grpc_server_shutdown_and_notify_import;
+#define grpc_server_shutdown_and_notify grpc_server_shutdown_and_notify_import
+typedef void(*grpc_server_cancel_all_calls_type)(grpc_server *server);
+extern grpc_server_cancel_all_calls_type grpc_server_cancel_all_calls_import;
+#define grpc_server_cancel_all_calls grpc_server_cancel_all_calls_import
+typedef void(*grpc_server_destroy_type)(grpc_server *server);
+extern grpc_server_destroy_type grpc_server_destroy_import;
+#define grpc_server_destroy grpc_server_destroy_import
+typedef int(*grpc_tracer_set_enabled_type)(const char *name, int enabled);
+extern grpc_tracer_set_enabled_type grpc_tracer_set_enabled_import;
+#define grpc_tracer_set_enabled grpc_tracer_set_enabled_import
+typedef int(*grpc_header_key_is_legal_type)(const char *key, size_t length);
+extern grpc_header_key_is_legal_type grpc_header_key_is_legal_import;
+#define grpc_header_key_is_legal grpc_header_key_is_legal_import
+typedef int(*grpc_header_nonbin_value_is_legal_type)(const char *value, size_t length);
+extern grpc_header_nonbin_value_is_legal_type grpc_header_nonbin_value_is_legal_import;
+#define grpc_header_nonbin_value_is_legal grpc_header_nonbin_value_is_legal_import
+typedef int(*grpc_is_binary_header_type)(const char *key, size_t length);
+extern grpc_is_binary_header_type grpc_is_binary_header_import;
+#define grpc_is_binary_header grpc_is_binary_header_import
+typedef const grpc_auth_property *(*grpc_auth_property_iterator_next_type)(grpc_auth_property_iterator *it);
+extern grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
+#define grpc_auth_property_iterator_next grpc_auth_property_iterator_next_import
+typedef grpc_auth_property_iterator(*grpc_auth_context_property_iterator_type)(const grpc_auth_context *ctx);
+extern grpc_auth_context_property_iterator_type grpc_auth_context_property_iterator_import;
+#define grpc_auth_context_property_iterator grpc_auth_context_property_iterator_import
+typedef grpc_auth_property_iterator(*grpc_auth_context_peer_identity_type)(const grpc_auth_context *ctx);
+extern grpc_auth_context_peer_identity_type grpc_auth_context_peer_identity_import;
+#define grpc_auth_context_peer_identity grpc_auth_context_peer_identity_import
+typedef grpc_auth_property_iterator(*grpc_auth_context_find_properties_by_name_type)(const grpc_auth_context *ctx, const char *name);
+extern grpc_auth_context_find_properties_by_name_type grpc_auth_context_find_properties_by_name_import;
+#define grpc_auth_context_find_properties_by_name grpc_auth_context_find_properties_by_name_import
+typedef const char *(*grpc_auth_context_peer_identity_property_name_type)(const grpc_auth_context *ctx);
+extern grpc_auth_context_peer_identity_property_name_type grpc_auth_context_peer_identity_property_name_import;
+#define grpc_auth_context_peer_identity_property_name grpc_auth_context_peer_identity_property_name_import
+typedef int(*grpc_auth_context_peer_is_authenticated_type)(const grpc_auth_context *ctx);
+extern grpc_auth_context_peer_is_authenticated_type grpc_auth_context_peer_is_authenticated_import;
+#define grpc_auth_context_peer_is_authenticated grpc_auth_context_peer_is_authenticated_import
+typedef grpc_auth_context *(*grpc_call_auth_context_type)(grpc_call *call);
+extern grpc_call_auth_context_type grpc_call_auth_context_import;
+#define grpc_call_auth_context grpc_call_auth_context_import
+typedef void(*grpc_auth_context_release_type)(grpc_auth_context *context);
+extern grpc_auth_context_release_type grpc_auth_context_release_import;
+#define grpc_auth_context_release grpc_auth_context_release_import
+typedef void(*grpc_auth_context_add_property_type)(grpc_auth_context *ctx, const char *name, const char *value, size_t value_length);
+extern grpc_auth_context_add_property_type grpc_auth_context_add_property_import;
+#define grpc_auth_context_add_property grpc_auth_context_add_property_import
+typedef void(*grpc_auth_context_add_cstring_property_type)(grpc_auth_context *ctx, const char *name, const char *value);
+extern grpc_auth_context_add_cstring_property_type grpc_auth_context_add_cstring_property_import;
+#define grpc_auth_context_add_cstring_property grpc_auth_context_add_cstring_property_import
+typedef int(*grpc_auth_context_set_peer_identity_property_name_type)(grpc_auth_context *ctx, const char *name);
+extern grpc_auth_context_set_peer_identity_property_name_type grpc_auth_context_set_peer_identity_property_name_import;
+#define grpc_auth_context_set_peer_identity_property_name grpc_auth_context_set_peer_identity_property_name_import
+typedef void(*grpc_channel_credentials_release_type)(grpc_channel_credentials *creds);
+extern grpc_channel_credentials_release_type grpc_channel_credentials_release_import;
+#define grpc_channel_credentials_release grpc_channel_credentials_release_import
+typedef grpc_channel_credentials *(*grpc_google_default_credentials_create_type)(void);
+extern grpc_google_default_credentials_create_type grpc_google_default_credentials_create_import;
+#define grpc_google_default_credentials_create grpc_google_default_credentials_create_import
+typedef grpc_channel_credentials *(*grpc_ssl_credentials_create_type)(const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pair, void *reserved);
+extern grpc_ssl_credentials_create_type grpc_ssl_credentials_create_import;
+#define grpc_ssl_credentials_create grpc_ssl_credentials_create_import
+typedef void(*grpc_call_credentials_release_type)(grpc_call_credentials *creds);
+extern grpc_call_credentials_release_type grpc_call_credentials_release_import;
+#define grpc_call_credentials_release grpc_call_credentials_release_import
+typedef grpc_channel_credentials *(*grpc_composite_channel_credentials_create_type)(grpc_channel_credentials *channel_creds, grpc_call_credentials *call_creds, void *reserved);
+extern grpc_composite_channel_credentials_create_type grpc_composite_channel_credentials_create_import;
+#define grpc_composite_channel_credentials_create grpc_composite_channel_credentials_create_import
+typedef grpc_call_credentials *(*grpc_composite_call_credentials_create_type)(grpc_call_credentials *creds1, grpc_call_credentials *creds2, void *reserved);
+extern grpc_composite_call_credentials_create_type grpc_composite_call_credentials_create_import;
+#define grpc_composite_call_credentials_create grpc_composite_call_credentials_create_import
+typedef grpc_call_credentials *(*grpc_google_compute_engine_credentials_create_type)(void *reserved);
+extern grpc_google_compute_engine_credentials_create_type grpc_google_compute_engine_credentials_create_import;
+#define grpc_google_compute_engine_credentials_create grpc_google_compute_engine_credentials_create_import
+typedef gpr_timespec(*grpc_max_auth_token_lifetime_type)();
+extern grpc_max_auth_token_lifetime_type grpc_max_auth_token_lifetime_import;
+#define grpc_max_auth_token_lifetime grpc_max_auth_token_lifetime_import
+typedef grpc_call_credentials *(*grpc_service_account_jwt_access_credentials_create_type)(const char *json_key, gpr_timespec token_lifetime, void *reserved);
+extern grpc_service_account_jwt_access_credentials_create_type grpc_service_account_jwt_access_credentials_create_import;
+#define grpc_service_account_jwt_access_credentials_create grpc_service_account_jwt_access_credentials_create_import
+typedef grpc_call_credentials *(*grpc_google_refresh_token_credentials_create_type)(const char *json_refresh_token, void *reserved);
+extern grpc_google_refresh_token_credentials_create_type grpc_google_refresh_token_credentials_create_import;
+#define grpc_google_refresh_token_credentials_create grpc_google_refresh_token_credentials_create_import
+typedef grpc_call_credentials *(*grpc_access_token_credentials_create_type)(const char *access_token, void *reserved);
+extern grpc_access_token_credentials_create_type grpc_access_token_credentials_create_import;
+#define grpc_access_token_credentials_create grpc_access_token_credentials_create_import
+typedef grpc_call_credentials *(*grpc_google_iam_credentials_create_type)(const char *authorization_token, const char *authority_selector, void *reserved);
+extern grpc_google_iam_credentials_create_type grpc_google_iam_credentials_create_import;
+#define grpc_google_iam_credentials_create grpc_google_iam_credentials_create_import
+typedef grpc_call_credentials *(*grpc_metadata_credentials_create_from_plugin_type)(grpc_metadata_credentials_plugin plugin, void *reserved);
+extern grpc_metadata_credentials_create_from_plugin_type grpc_metadata_credentials_create_from_plugin_import;
+#define grpc_metadata_credentials_create_from_plugin grpc_metadata_credentials_create_from_plugin_import
+typedef grpc_channel *(*grpc_secure_channel_create_type)(grpc_channel_credentials *creds, const char *target, const grpc_channel_args *args, void *reserved);
+extern grpc_secure_channel_create_type grpc_secure_channel_create_import;
+#define grpc_secure_channel_create grpc_secure_channel_create_import
+typedef void(*grpc_server_credentials_release_type)(grpc_server_credentials *creds);
+extern grpc_server_credentials_release_type grpc_server_credentials_release_import;
+#define grpc_server_credentials_release grpc_server_credentials_release_import
+typedef grpc_server_credentials *(*grpc_ssl_server_credentials_create_type)(const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pairs, size_t num_key_cert_pairs, int force_client_auth, void *reserved);
+extern grpc_ssl_server_credentials_create_type grpc_ssl_server_credentials_create_import;
+#define grpc_ssl_server_credentials_create grpc_ssl_server_credentials_create_import
+typedef int(*grpc_server_add_secure_http2_port_type)(grpc_server *server, const char *addr, grpc_server_credentials *creds);
+extern grpc_server_add_secure_http2_port_type grpc_server_add_secure_http2_port_import;
+#define grpc_server_add_secure_http2_port grpc_server_add_secure_http2_port_import
+typedef grpc_call_error(*grpc_call_set_credentials_type)(grpc_call *call, grpc_call_credentials *creds);
+extern grpc_call_set_credentials_type grpc_call_set_credentials_import;
+#define grpc_call_set_credentials grpc_call_set_credentials_import
+typedef void(*grpc_server_credentials_set_auth_metadata_processor_type)(grpc_server_credentials *creds, grpc_auth_metadata_processor processor);
+extern grpc_server_credentials_set_auth_metadata_processor_type grpc_server_credentials_set_auth_metadata_processor_import;
+#define grpc_server_credentials_set_auth_metadata_processor grpc_server_credentials_set_auth_metadata_processor_import
+typedef void *(*gpr_malloc_type)(size_t size);
+extern gpr_malloc_type gpr_malloc_import;
+#define gpr_malloc gpr_malloc_import
+typedef void(*gpr_free_type)(void *ptr);
+extern gpr_free_type gpr_free_import;
+#define gpr_free gpr_free_import
+typedef void *(*gpr_realloc_type)(void *p, size_t size);
+extern gpr_realloc_type gpr_realloc_import;
+#define gpr_realloc gpr_realloc_import
+typedef void *(*gpr_malloc_aligned_type)(size_t size, size_t alignment_log);
+extern gpr_malloc_aligned_type gpr_malloc_aligned_import;
+#define gpr_malloc_aligned gpr_malloc_aligned_import
+typedef void(*gpr_free_aligned_type)(void *ptr);
+extern gpr_free_aligned_type gpr_free_aligned_import;
+#define gpr_free_aligned gpr_free_aligned_import
+typedef void(*gpr_set_allocation_functions_type)(gpr_allocation_functions functions);
+extern gpr_set_allocation_functions_type gpr_set_allocation_functions_import;
+#define gpr_set_allocation_functions gpr_set_allocation_functions_import
+typedef gpr_allocation_functions(*gpr_get_allocation_functions_type)();
+extern gpr_get_allocation_functions_type gpr_get_allocation_functions_import;
+#define gpr_get_allocation_functions gpr_get_allocation_functions_import
+typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_create_type)(gpr_slice *slices, size_t nslices);
+extern grpc_raw_byte_buffer_create_type grpc_raw_byte_buffer_create_import;
+#define grpc_raw_byte_buffer_create grpc_raw_byte_buffer_create_import
+typedef grpc_byte_buffer *(*grpc_raw_compressed_byte_buffer_create_type)(gpr_slice *slices, size_t nslices, grpc_compression_algorithm compression);
+extern grpc_raw_compressed_byte_buffer_create_type grpc_raw_compressed_byte_buffer_create_import;
+#define grpc_raw_compressed_byte_buffer_create grpc_raw_compressed_byte_buffer_create_import
+typedef grpc_byte_buffer *(*grpc_byte_buffer_copy_type)(grpc_byte_buffer *bb);
+extern grpc_byte_buffer_copy_type grpc_byte_buffer_copy_import;
+#define grpc_byte_buffer_copy grpc_byte_buffer_copy_import
+typedef size_t(*grpc_byte_buffer_length_type)(grpc_byte_buffer *bb);
+extern grpc_byte_buffer_length_type grpc_byte_buffer_length_import;
+#define grpc_byte_buffer_length grpc_byte_buffer_length_import
+typedef void(*grpc_byte_buffer_destroy_type)(grpc_byte_buffer *byte_buffer);
+extern grpc_byte_buffer_destroy_type grpc_byte_buffer_destroy_import;
+#define grpc_byte_buffer_destroy grpc_byte_buffer_destroy_import
+typedef void(*grpc_byte_buffer_reader_init_type)(grpc_byte_buffer_reader *reader, grpc_byte_buffer *buffer);
+extern grpc_byte_buffer_reader_init_type grpc_byte_buffer_reader_init_import;
+#define grpc_byte_buffer_reader_init grpc_byte_buffer_reader_init_import
+typedef void(*grpc_byte_buffer_reader_destroy_type)(grpc_byte_buffer_reader *reader);
+extern grpc_byte_buffer_reader_destroy_type grpc_byte_buffer_reader_destroy_import;
+#define grpc_byte_buffer_reader_destroy grpc_byte_buffer_reader_destroy_import
+typedef int(*grpc_byte_buffer_reader_next_type)(grpc_byte_buffer_reader *reader, gpr_slice *slice);
+extern grpc_byte_buffer_reader_next_type grpc_byte_buffer_reader_next_import;
+#define grpc_byte_buffer_reader_next grpc_byte_buffer_reader_next_import
+typedef gpr_slice(*grpc_byte_buffer_reader_readall_type)(grpc_byte_buffer_reader *reader);
+extern grpc_byte_buffer_reader_readall_type grpc_byte_buffer_reader_readall_import;
+#define grpc_byte_buffer_reader_readall grpc_byte_buffer_reader_readall_import
+typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_from_reader_type)(grpc_byte_buffer_reader *reader);
+extern grpc_raw_byte_buffer_from_reader_type grpc_raw_byte_buffer_from_reader_import;
+#define grpc_raw_byte_buffer_from_reader grpc_raw_byte_buffer_from_reader_import
+typedef void(*gpr_log_type)(const char *file, int line, gpr_log_severity severity, const char *format, ...);
+extern gpr_log_type gpr_log_import;
+#define gpr_log gpr_log_import
+typedef void(*gpr_log_message_type)(const char *file, int line, gpr_log_severity severity, const char *message);
+extern gpr_log_message_type gpr_log_message_import;
+#define gpr_log_message gpr_log_message_import
+typedef void(*gpr_set_log_function_type)(gpr_log_func func);
+extern gpr_set_log_function_type gpr_set_log_function_import;
+#define gpr_set_log_function gpr_set_log_function_import
+typedef gpr_slice(*gpr_slice_ref_type)(gpr_slice s);
+extern gpr_slice_ref_type gpr_slice_ref_import;
+#define gpr_slice_ref gpr_slice_ref_import
+typedef void(*gpr_slice_unref_type)(gpr_slice s);
+extern gpr_slice_unref_type gpr_slice_unref_import;
+#define gpr_slice_unref gpr_slice_unref_import
+typedef gpr_slice(*gpr_slice_new_type)(void *p, size_t len, void (*destroy)(void *));
+extern gpr_slice_new_type gpr_slice_new_import;
+#define gpr_slice_new gpr_slice_new_import
+typedef gpr_slice(*gpr_slice_new_with_len_type)(void *p, size_t len, void (*destroy)(void *, size_t));
+extern gpr_slice_new_with_len_type gpr_slice_new_with_len_import;
+#define gpr_slice_new_with_len gpr_slice_new_with_len_import
+typedef gpr_slice(*gpr_slice_malloc_type)(size_t length);
+extern gpr_slice_malloc_type gpr_slice_malloc_import;
+#define gpr_slice_malloc gpr_slice_malloc_import
+typedef gpr_slice(*gpr_slice_from_copied_string_type)(const char *source);
+extern gpr_slice_from_copied_string_type gpr_slice_from_copied_string_import;
+#define gpr_slice_from_copied_string gpr_slice_from_copied_string_import
+typedef gpr_slice(*gpr_slice_from_copied_buffer_type)(const char *source, size_t len);
+extern gpr_slice_from_copied_buffer_type gpr_slice_from_copied_buffer_import;
+#define gpr_slice_from_copied_buffer gpr_slice_from_copied_buffer_import
+typedef gpr_slice(*gpr_slice_from_static_string_type)(const char *source);
+extern gpr_slice_from_static_string_type gpr_slice_from_static_string_import;
+#define gpr_slice_from_static_string gpr_slice_from_static_string_import
+typedef gpr_slice(*gpr_slice_sub_type)(gpr_slice s, size_t begin, size_t end);
+extern gpr_slice_sub_type gpr_slice_sub_import;
+#define gpr_slice_sub gpr_slice_sub_import
+typedef gpr_slice(*gpr_slice_sub_no_ref_type)(gpr_slice s, size_t begin, size_t end);
+extern gpr_slice_sub_no_ref_type gpr_slice_sub_no_ref_import;
+#define gpr_slice_sub_no_ref gpr_slice_sub_no_ref_import
+typedef gpr_slice(*gpr_slice_split_tail_type)(gpr_slice *s, size_t split);
+extern gpr_slice_split_tail_type gpr_slice_split_tail_import;
+#define gpr_slice_split_tail gpr_slice_split_tail_import
+typedef gpr_slice(*gpr_slice_split_head_type)(gpr_slice *s, size_t split);
+extern gpr_slice_split_head_type gpr_slice_split_head_import;
+#define gpr_slice_split_head gpr_slice_split_head_import
+typedef gpr_slice(*gpr_empty_slice_type)(void);
+extern gpr_empty_slice_type gpr_empty_slice_import;
+#define gpr_empty_slice gpr_empty_slice_import
+typedef int(*gpr_slice_cmp_type)(gpr_slice a, gpr_slice b);
+extern gpr_slice_cmp_type gpr_slice_cmp_import;
+#define gpr_slice_cmp gpr_slice_cmp_import
+typedef int(*gpr_slice_str_cmp_type)(gpr_slice a, const char *b);
+extern gpr_slice_str_cmp_type gpr_slice_str_cmp_import;
+#define gpr_slice_str_cmp gpr_slice_str_cmp_import
+typedef void(*gpr_slice_buffer_init_type)(gpr_slice_buffer *sb);
+extern gpr_slice_buffer_init_type gpr_slice_buffer_init_import;
+#define gpr_slice_buffer_init gpr_slice_buffer_init_import
+typedef void(*gpr_slice_buffer_destroy_type)(gpr_slice_buffer *sb);
+extern gpr_slice_buffer_destroy_type gpr_slice_buffer_destroy_import;
+#define gpr_slice_buffer_destroy gpr_slice_buffer_destroy_import
+typedef void(*gpr_slice_buffer_add_type)(gpr_slice_buffer *sb, gpr_slice slice);
+extern gpr_slice_buffer_add_type gpr_slice_buffer_add_import;
+#define gpr_slice_buffer_add gpr_slice_buffer_add_import
+typedef size_t(*gpr_slice_buffer_add_indexed_type)(gpr_slice_buffer *sb, gpr_slice slice);
+extern gpr_slice_buffer_add_indexed_type gpr_slice_buffer_add_indexed_import;
+#define gpr_slice_buffer_add_indexed gpr_slice_buffer_add_indexed_import
+typedef void(*gpr_slice_buffer_addn_type)(gpr_slice_buffer *sb, gpr_slice *slices, size_t n);
+extern gpr_slice_buffer_addn_type gpr_slice_buffer_addn_import;
+#define gpr_slice_buffer_addn gpr_slice_buffer_addn_import
+typedef uint8_t *(*gpr_slice_buffer_tiny_add_type)(gpr_slice_buffer *sb, size_t len);
+extern gpr_slice_buffer_tiny_add_type gpr_slice_buffer_tiny_add_import;
+#define gpr_slice_buffer_tiny_add gpr_slice_buffer_tiny_add_import
+typedef void(*gpr_slice_buffer_pop_type)(gpr_slice_buffer *sb);
+extern gpr_slice_buffer_pop_type gpr_slice_buffer_pop_import;
+#define gpr_slice_buffer_pop gpr_slice_buffer_pop_import
+typedef void(*gpr_slice_buffer_reset_and_unref_type)(gpr_slice_buffer *sb);
+extern gpr_slice_buffer_reset_and_unref_type gpr_slice_buffer_reset_and_unref_import;
+#define gpr_slice_buffer_reset_and_unref gpr_slice_buffer_reset_and_unref_import
+typedef void(*gpr_slice_buffer_swap_type)(gpr_slice_buffer *a, gpr_slice_buffer *b);
+extern gpr_slice_buffer_swap_type gpr_slice_buffer_swap_import;
+#define gpr_slice_buffer_swap gpr_slice_buffer_swap_import
+typedef void(*gpr_slice_buffer_move_into_type)(gpr_slice_buffer *src, gpr_slice_buffer *dst);
+extern gpr_slice_buffer_move_into_type gpr_slice_buffer_move_into_import;
+#define gpr_slice_buffer_move_into gpr_slice_buffer_move_into_import
+typedef void(*gpr_slice_buffer_trim_end_type)(gpr_slice_buffer *src, size_t n, gpr_slice_buffer *garbage);
+extern gpr_slice_buffer_trim_end_type gpr_slice_buffer_trim_end_import;
+#define gpr_slice_buffer_trim_end gpr_slice_buffer_trim_end_import
+typedef void(*gpr_slice_buffer_move_first_type)(gpr_slice_buffer *src, size_t n, gpr_slice_buffer *dst);
+extern gpr_slice_buffer_move_first_type gpr_slice_buffer_move_first_import;
+#define gpr_slice_buffer_move_first gpr_slice_buffer_move_first_import
+typedef gpr_slice(*gpr_slice_buffer_take_first_type)(gpr_slice_buffer *src);
+extern gpr_slice_buffer_take_first_type gpr_slice_buffer_take_first_import;
+#define gpr_slice_buffer_take_first gpr_slice_buffer_take_first_import
+typedef void(*gpr_mu_init_type)(gpr_mu *mu);
+extern gpr_mu_init_type gpr_mu_init_import;
+#define gpr_mu_init gpr_mu_init_import
+typedef void(*gpr_mu_destroy_type)(gpr_mu *mu);
+extern gpr_mu_destroy_type gpr_mu_destroy_import;
+#define gpr_mu_destroy gpr_mu_destroy_import
+typedef void(*gpr_mu_lock_type)(gpr_mu *mu);
+extern gpr_mu_lock_type gpr_mu_lock_import;
+#define gpr_mu_lock gpr_mu_lock_import
+typedef void(*gpr_mu_unlock_type)(gpr_mu *mu);
+extern gpr_mu_unlock_type gpr_mu_unlock_import;
+#define gpr_mu_unlock gpr_mu_unlock_import
+typedef int(*gpr_mu_trylock_type)(gpr_mu *mu);
+extern gpr_mu_trylock_type gpr_mu_trylock_import;
+#define gpr_mu_trylock gpr_mu_trylock_import
+typedef void(*gpr_cv_init_type)(gpr_cv *cv);
+extern gpr_cv_init_type gpr_cv_init_import;
+#define gpr_cv_init gpr_cv_init_import
+typedef void(*gpr_cv_destroy_type)(gpr_cv *cv);
+extern gpr_cv_destroy_type gpr_cv_destroy_import;
+#define gpr_cv_destroy gpr_cv_destroy_import
+typedef int(*gpr_cv_wait_type)(gpr_cv *cv, gpr_mu *mu, gpr_timespec abs_deadline);
+extern gpr_cv_wait_type gpr_cv_wait_import;
+#define gpr_cv_wait gpr_cv_wait_import
+typedef void(*gpr_cv_signal_type)(gpr_cv *cv);
+extern gpr_cv_signal_type gpr_cv_signal_import;
+#define gpr_cv_signal gpr_cv_signal_import
+typedef void(*gpr_cv_broadcast_type)(gpr_cv *cv);
+extern gpr_cv_broadcast_type gpr_cv_broadcast_import;
+#define gpr_cv_broadcast gpr_cv_broadcast_import
+typedef void(*gpr_once_init_type)(gpr_once *once, void (*init_routine)(void));
+extern gpr_once_init_type gpr_once_init_import;
+#define gpr_once_init gpr_once_init_import
+typedef void(*gpr_event_init_type)(gpr_event *ev);
+extern gpr_event_init_type gpr_event_init_import;
+#define gpr_event_init gpr_event_init_import
+typedef void(*gpr_event_set_type)(gpr_event *ev, void *value);
+extern gpr_event_set_type gpr_event_set_import;
+#define gpr_event_set gpr_event_set_import
+typedef void *(*gpr_event_get_type)(gpr_event *ev);
+extern gpr_event_get_type gpr_event_get_import;
+#define gpr_event_get gpr_event_get_import
+typedef void *(*gpr_event_wait_type)(gpr_event *ev, gpr_timespec abs_deadline);
+extern gpr_event_wait_type gpr_event_wait_import;
+#define gpr_event_wait gpr_event_wait_import
+typedef void(*gpr_ref_init_type)(gpr_refcount *r, int n);
+extern gpr_ref_init_type gpr_ref_init_import;
+#define gpr_ref_init gpr_ref_init_import
+typedef void(*gpr_ref_type)(gpr_refcount *r);
+extern gpr_ref_type gpr_ref_import;
+#define gpr_ref gpr_ref_import
+typedef void(*gpr_refn_type)(gpr_refcount *r, int n);
+extern gpr_refn_type gpr_refn_import;
+#define gpr_refn gpr_refn_import
+typedef int(*gpr_unref_type)(gpr_refcount *r);
+extern gpr_unref_type gpr_unref_import;
+#define gpr_unref gpr_unref_import
+typedef void(*gpr_stats_init_type)(gpr_stats_counter *c, intptr_t n);
+extern gpr_stats_init_type gpr_stats_init_import;
+#define gpr_stats_init gpr_stats_init_import
+typedef void(*gpr_stats_inc_type)(gpr_stats_counter *c, intptr_t inc);
+extern gpr_stats_inc_type gpr_stats_inc_import;
+#define gpr_stats_inc gpr_stats_inc_import
+typedef intptr_t(*gpr_stats_read_type)(const gpr_stats_counter *c);
+extern gpr_stats_read_type gpr_stats_read_import;
+#define gpr_stats_read gpr_stats_read_import
+typedef gpr_timespec(*gpr_time_0_type)(gpr_clock_type type);
+extern gpr_time_0_type gpr_time_0_import;
+#define gpr_time_0 gpr_time_0_import
+typedef gpr_timespec(*gpr_inf_future_type)(gpr_clock_type type);
+extern gpr_inf_future_type gpr_inf_future_import;
+#define gpr_inf_future gpr_inf_future_import
+typedef gpr_timespec(*gpr_inf_past_type)(gpr_clock_type type);
+extern gpr_inf_past_type gpr_inf_past_import;
+#define gpr_inf_past gpr_inf_past_import
+typedef void(*gpr_time_init_type)(void);
+extern gpr_time_init_type gpr_time_init_import;
+#define gpr_time_init gpr_time_init_import
+typedef gpr_timespec(*gpr_now_type)(gpr_clock_type clock);
+extern gpr_now_type gpr_now_import;
+#define gpr_now gpr_now_import
+typedef gpr_timespec(*gpr_convert_clock_type_type)(gpr_timespec t, gpr_clock_type target_clock);
+extern gpr_convert_clock_type_type gpr_convert_clock_type_import;
+#define gpr_convert_clock_type gpr_convert_clock_type_import
+typedef int(*gpr_time_cmp_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_cmp_type gpr_time_cmp_import;
+#define gpr_time_cmp gpr_time_cmp_import
+typedef gpr_timespec(*gpr_time_max_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_max_type gpr_time_max_import;
+#define gpr_time_max gpr_time_max_import
+typedef gpr_timespec(*gpr_time_min_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_min_type gpr_time_min_import;
+#define gpr_time_min gpr_time_min_import
+typedef gpr_timespec(*gpr_time_add_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_add_type gpr_time_add_import;
+#define gpr_time_add gpr_time_add_import
+typedef gpr_timespec(*gpr_time_sub_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_sub_type gpr_time_sub_import;
+#define gpr_time_sub gpr_time_sub_import
+typedef gpr_timespec(*gpr_time_from_micros_type)(long x, gpr_clock_type clock_type);
+extern gpr_time_from_micros_type gpr_time_from_micros_import;
+#define gpr_time_from_micros gpr_time_from_micros_import
+typedef gpr_timespec(*gpr_time_from_nanos_type)(long x, gpr_clock_type clock_type);
+extern gpr_time_from_nanos_type gpr_time_from_nanos_import;
+#define gpr_time_from_nanos gpr_time_from_nanos_import
+typedef gpr_timespec(*gpr_time_from_millis_type)(long x, gpr_clock_type clock_type);
+extern gpr_time_from_millis_type gpr_time_from_millis_import;
+#define gpr_time_from_millis gpr_time_from_millis_import
+typedef gpr_timespec(*gpr_time_from_seconds_type)(long x, gpr_clock_type clock_type);
+extern gpr_time_from_seconds_type gpr_time_from_seconds_import;
+#define gpr_time_from_seconds gpr_time_from_seconds_import
+typedef gpr_timespec(*gpr_time_from_minutes_type)(long x, gpr_clock_type clock_type);
+extern gpr_time_from_minutes_type gpr_time_from_minutes_import;
+#define gpr_time_from_minutes gpr_time_from_minutes_import
+typedef gpr_timespec(*gpr_time_from_hours_type)(long x, gpr_clock_type clock_type);
+extern gpr_time_from_hours_type gpr_time_from_hours_import;
+#define gpr_time_from_hours gpr_time_from_hours_import
+typedef int32_t(*gpr_time_to_millis_type)(gpr_timespec timespec);
+extern gpr_time_to_millis_type gpr_time_to_millis_import;
+#define gpr_time_to_millis gpr_time_to_millis_import
+typedef int(*gpr_time_similar_type)(gpr_timespec a, gpr_timespec b, gpr_timespec threshold);
+extern gpr_time_similar_type gpr_time_similar_import;
+#define gpr_time_similar gpr_time_similar_import
+typedef void(*gpr_sleep_until_type)(gpr_timespec until);
+extern gpr_sleep_until_type gpr_sleep_until_import;
+#define gpr_sleep_until gpr_sleep_until_import
+typedef double(*gpr_timespec_to_micros_type)(gpr_timespec t);
+extern gpr_timespec_to_micros_type gpr_timespec_to_micros_import;
+#define gpr_timespec_to_micros gpr_timespec_to_micros_import
+typedef gpr_avl(*gpr_avl_create_type)(const gpr_avl_vtable *vtable);
+extern gpr_avl_create_type gpr_avl_create_import;
+#define gpr_avl_create gpr_avl_create_import
+typedef gpr_avl(*gpr_avl_ref_type)(gpr_avl avl);
+extern gpr_avl_ref_type gpr_avl_ref_import;
+#define gpr_avl_ref gpr_avl_ref_import
+typedef void(*gpr_avl_unref_type)(gpr_avl avl);
+extern gpr_avl_unref_type gpr_avl_unref_import;
+#define gpr_avl_unref gpr_avl_unref_import
+typedef gpr_avl(*gpr_avl_add_type)(gpr_avl avl, void *key, void *value);
+extern gpr_avl_add_type gpr_avl_add_import;
+#define gpr_avl_add gpr_avl_add_import
+typedef gpr_avl(*gpr_avl_remove_type)(gpr_avl avl, void *key);
+extern gpr_avl_remove_type gpr_avl_remove_import;
+#define gpr_avl_remove gpr_avl_remove_import
+typedef void *(*gpr_avl_get_type)(gpr_avl avl, void *key);
+extern gpr_avl_get_type gpr_avl_get_import;
+#define gpr_avl_get gpr_avl_get_import
+typedef gpr_cmdline *(*gpr_cmdline_create_type)(const char *description);
+extern gpr_cmdline_create_type gpr_cmdline_create_import;
+#define gpr_cmdline_create gpr_cmdline_create_import
+typedef void(*gpr_cmdline_add_int_type)(gpr_cmdline *cl, const char *name, const char *help, int *value);
+extern gpr_cmdline_add_int_type gpr_cmdline_add_int_import;
+#define gpr_cmdline_add_int gpr_cmdline_add_int_import
+typedef void(*gpr_cmdline_add_flag_type)(gpr_cmdline *cl, const char *name, const char *help, int *value);
+extern gpr_cmdline_add_flag_type gpr_cmdline_add_flag_import;
+#define gpr_cmdline_add_flag gpr_cmdline_add_flag_import
+typedef void(*gpr_cmdline_add_string_type)(gpr_cmdline *cl, const char *name, const char *help, char **value);
+extern gpr_cmdline_add_string_type gpr_cmdline_add_string_import;
+#define gpr_cmdline_add_string gpr_cmdline_add_string_import
+typedef void(*gpr_cmdline_on_extra_arg_type)(gpr_cmdline *cl, const char *name, const char *help, void (*on_extra_arg)(void *user_data, const char *arg), void *user_data);
+extern gpr_cmdline_on_extra_arg_type gpr_cmdline_on_extra_arg_import;
+#define gpr_cmdline_on_extra_arg gpr_cmdline_on_extra_arg_import
+typedef void(*gpr_cmdline_set_survive_failure_type)(gpr_cmdline *cl);
+extern gpr_cmdline_set_survive_failure_type gpr_cmdline_set_survive_failure_import;
+#define gpr_cmdline_set_survive_failure gpr_cmdline_set_survive_failure_import
+typedef int(*gpr_cmdline_parse_type)(gpr_cmdline *cl, int argc, char **argv);
+extern gpr_cmdline_parse_type gpr_cmdline_parse_import;
+#define gpr_cmdline_parse gpr_cmdline_parse_import
+typedef void(*gpr_cmdline_destroy_type)(gpr_cmdline *cl);
+extern gpr_cmdline_destroy_type gpr_cmdline_destroy_import;
+#define gpr_cmdline_destroy gpr_cmdline_destroy_import
+typedef char *(*gpr_cmdline_usage_string_type)(gpr_cmdline *cl, const char *argv0);
+extern gpr_cmdline_usage_string_type gpr_cmdline_usage_string_import;
+#define gpr_cmdline_usage_string gpr_cmdline_usage_string_import
+typedef unsigned(*gpr_cpu_num_cores_type)(void);
+extern gpr_cpu_num_cores_type gpr_cpu_num_cores_import;
+#define gpr_cpu_num_cores gpr_cpu_num_cores_import
+typedef unsigned(*gpr_cpu_current_cpu_type)(void);
+extern gpr_cpu_current_cpu_type gpr_cpu_current_cpu_import;
+#define gpr_cpu_current_cpu gpr_cpu_current_cpu_import
+typedef gpr_histogram *(*gpr_histogram_create_type)(double resolution, double max_bucket_start);
+extern gpr_histogram_create_type gpr_histogram_create_import;
+#define gpr_histogram_create gpr_histogram_create_import
+typedef void(*gpr_histogram_destroy_type)(gpr_histogram *h);
+extern gpr_histogram_destroy_type gpr_histogram_destroy_import;
+#define gpr_histogram_destroy gpr_histogram_destroy_import
+typedef void(*gpr_histogram_add_type)(gpr_histogram *h, double x);
+extern gpr_histogram_add_type gpr_histogram_add_import;
+#define gpr_histogram_add gpr_histogram_add_import
+typedef int(*gpr_histogram_merge_type)(gpr_histogram *dst, const gpr_histogram *src);
+extern gpr_histogram_merge_type gpr_histogram_merge_import;
+#define gpr_histogram_merge gpr_histogram_merge_import
+typedef double(*gpr_histogram_percentile_type)(gpr_histogram *histogram, double percentile);
+extern gpr_histogram_percentile_type gpr_histogram_percentile_import;
+#define gpr_histogram_percentile gpr_histogram_percentile_import
+typedef double(*gpr_histogram_mean_type)(gpr_histogram *histogram);
+extern gpr_histogram_mean_type gpr_histogram_mean_import;
+#define gpr_histogram_mean gpr_histogram_mean_import
+typedef double(*gpr_histogram_stddev_type)(gpr_histogram *histogram);
+extern gpr_histogram_stddev_type gpr_histogram_stddev_import;
+#define gpr_histogram_stddev gpr_histogram_stddev_import
+typedef double(*gpr_histogram_variance_type)(gpr_histogram *histogram);
+extern gpr_histogram_variance_type gpr_histogram_variance_import;
+#define gpr_histogram_variance gpr_histogram_variance_import
+typedef double(*gpr_histogram_maximum_type)(gpr_histogram *histogram);
+extern gpr_histogram_maximum_type gpr_histogram_maximum_import;
+#define gpr_histogram_maximum gpr_histogram_maximum_import
+typedef double(*gpr_histogram_minimum_type)(gpr_histogram *histogram);
+extern gpr_histogram_minimum_type gpr_histogram_minimum_import;
+#define gpr_histogram_minimum gpr_histogram_minimum_import
+typedef double(*gpr_histogram_count_type)(gpr_histogram *histogram);
+extern gpr_histogram_count_type gpr_histogram_count_import;
+#define gpr_histogram_count gpr_histogram_count_import
+typedef double(*gpr_histogram_sum_type)(gpr_histogram *histogram);
+extern gpr_histogram_sum_type gpr_histogram_sum_import;
+#define gpr_histogram_sum gpr_histogram_sum_import
+typedef double(*gpr_histogram_sum_of_squares_type)(gpr_histogram *histogram);
+extern gpr_histogram_sum_of_squares_type gpr_histogram_sum_of_squares_import;
+#define gpr_histogram_sum_of_squares gpr_histogram_sum_of_squares_import
+typedef const uint32_t *(*gpr_histogram_get_contents_type)(gpr_histogram *histogram, size_t *count);
+extern gpr_histogram_get_contents_type gpr_histogram_get_contents_import;
+#define gpr_histogram_get_contents gpr_histogram_get_contents_import
+typedef void(*gpr_histogram_merge_contents_type)(gpr_histogram *histogram, const uint32_t *data, size_t data_count, double min_seen, double max_seen, double sum, double sum_of_squares, double count);
+extern gpr_histogram_merge_contents_type gpr_histogram_merge_contents_import;
+#define gpr_histogram_merge_contents gpr_histogram_merge_contents_import
+typedef int(*gpr_join_host_port_type)(char **out, const char *host, int port);
+extern gpr_join_host_port_type gpr_join_host_port_import;
+#define gpr_join_host_port gpr_join_host_port_import
+typedef int(*gpr_split_host_port_type)(const char *name, char **host, char **port);
+extern gpr_split_host_port_type gpr_split_host_port_import;
+#define gpr_split_host_port gpr_split_host_port_import
+typedef char *(*gpr_format_message_type)(int messageid);
+extern gpr_format_message_type gpr_format_message_import;
+#define gpr_format_message gpr_format_message_import
+typedef char *(*gpr_strdup_type)(const char *src);
+extern gpr_strdup_type gpr_strdup_import;
+#define gpr_strdup gpr_strdup_import
+typedef int(*gpr_asprintf_type)(char **strp, const char *format, ...);
+extern gpr_asprintf_type gpr_asprintf_import;
+#define gpr_asprintf gpr_asprintf_import
+typedef const char *(*gpr_subprocess_binary_extension_type)();
+extern gpr_subprocess_binary_extension_type gpr_subprocess_binary_extension_import;
+#define gpr_subprocess_binary_extension gpr_subprocess_binary_extension_import
+typedef gpr_subprocess *(*gpr_subprocess_create_type)(int argc, const char **argv);
+extern gpr_subprocess_create_type gpr_subprocess_create_import;
+#define gpr_subprocess_create gpr_subprocess_create_import
+typedef void(*gpr_subprocess_destroy_type)(gpr_subprocess *p);
+extern gpr_subprocess_destroy_type gpr_subprocess_destroy_import;
+#define gpr_subprocess_destroy gpr_subprocess_destroy_import
+typedef int(*gpr_subprocess_join_type)(gpr_subprocess *p);
+extern gpr_subprocess_join_type gpr_subprocess_join_import;
+#define gpr_subprocess_join gpr_subprocess_join_import
+typedef void(*gpr_subprocess_interrupt_type)(gpr_subprocess *p);
+extern gpr_subprocess_interrupt_type gpr_subprocess_interrupt_import;
+#define gpr_subprocess_interrupt gpr_subprocess_interrupt_import
+typedef int(*gpr_thd_new_type)(gpr_thd_id *t, void (*thd_body)(void *arg), void *arg, const gpr_thd_options *options);
+extern gpr_thd_new_type gpr_thd_new_import;
+#define gpr_thd_new gpr_thd_new_import
+typedef gpr_thd_options(*gpr_thd_options_default_type)(void);
+extern gpr_thd_options_default_type gpr_thd_options_default_import;
+#define gpr_thd_options_default gpr_thd_options_default_import
+typedef void(*gpr_thd_options_set_detached_type)(gpr_thd_options *options);
+extern gpr_thd_options_set_detached_type gpr_thd_options_set_detached_import;
+#define gpr_thd_options_set_detached gpr_thd_options_set_detached_import
+typedef void(*gpr_thd_options_set_joinable_type)(gpr_thd_options *options);
+extern gpr_thd_options_set_joinable_type gpr_thd_options_set_joinable_import;
+#define gpr_thd_options_set_joinable gpr_thd_options_set_joinable_import
+typedef int(*gpr_thd_options_is_detached_type)(const gpr_thd_options *options);
+extern gpr_thd_options_is_detached_type gpr_thd_options_is_detached_import;
+#define gpr_thd_options_is_detached gpr_thd_options_is_detached_import
+typedef int(*gpr_thd_options_is_joinable_type)(const gpr_thd_options *options);
+extern gpr_thd_options_is_joinable_type gpr_thd_options_is_joinable_import;
+#define gpr_thd_options_is_joinable gpr_thd_options_is_joinable_import
+typedef gpr_thd_id(*gpr_thd_currentid_type)(void);
+extern gpr_thd_currentid_type gpr_thd_currentid_import;
+#define gpr_thd_currentid gpr_thd_currentid_import
+typedef void(*gpr_thd_join_type)(gpr_thd_id t);
+extern gpr_thd_join_type gpr_thd_join_import;
+#define gpr_thd_join gpr_thd_join_import
+
+void pygrpc_load_imports(HMODULE library);
+
+#else /* !GPR_WIN32 */
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/slice.h>
+#include <grpc/support/time.h>
+#include <grpc/status.h>
+#include <grpc/byte_buffer.h>
+#include <grpc/byte_buffer_reader.h>
+#include <grpc/grpc.h>
+#include <grpc/grpc_security.h>
+
+#endif /* !GPR_WIN32 */
+
+#endif
diff --git a/src/core/census/context.h b/src/python/grpcio/grpc/_cython/loader.c
index 700bcf86cf..cdd47deed3 100644
--- a/src/core/census/context.h
+++ b/src/python/grpcio/grpc/_cython/loader.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,17 +31,29 @@
  *
  */
 
-#ifndef GRPC_INTERNAL_CORE_CENSUS_CONTEXT_H
-#define GRPC_INTERNAL_CORE_CENSUS_CONTEXT_H
+#include "loader.h"
 
-#include <grpc/census.h>
+#if GPR_WIN32
 
-#define GRPC_CENSUS_MAX_ON_THE_WIRE_TAG_BYTES 2048
+int pygrpc_load_core(char *path) {
+  HMODULE grpc_c;
+#ifdef GPR_ARCH_32
+  /* Close your eyes for a moment, it'll all be over soon. */
+  char *six = strrchr(path, '6');
+  *six++ = '3';
+  *six = '2';
+#endif
+  grpc_c = LoadLibraryA(path);
+  if (grpc_c) {
+    pygrpc_load_imports(grpc_c);
+    return 1;
+  }
 
-/* census_context is the in-memory representation of information needed to
- * maintain tracing, RPC statistics and resource usage information. */
-struct census_context {
-  census_tag_set *tags; /* Opaque data structure for census tags. */
-};
+  return 0;
+}
 
-#endif /* GRPC_INTERNAL_CORE_CENSUS_CONTEXT_H */
+#else
+
+int pygrpc_load_core(char *path) { return 1; }
+
+#endif
diff --git a/src/python/grpcio/grpc/_cython/loader.h b/src/python/grpcio/grpc/_cython/loader.h
new file mode 100644
index 0000000000..dd31e1561b
--- /dev/null
+++ b/src/python/grpcio/grpc/_cython/loader.h
@@ -0,0 +1,45 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef PYGRPC_LOADER_H_
+#define PYGRPC_LOADER_H_
+
+#include "imports.generated.h"
+
+/* Additional inclusions not covered by "imports.generated.h" */
+#include <grpc/byte_buffer_reader.h>
+
+/* Attempts to load the core if necessary, and return non-zero upon succes. */
+int pygrpc_load_core(char *path);
+
+#endif /* GRPC_RB_BYTE_BUFFER_H_ */
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index ea63b41a76..8d289eab03 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -30,48 +30,6 @@
 # AUTO-GENERATED FROM `$REPO_ROOT/templates/src/python/grpcio/grpc_core_dependencies.py.template`!!!
 
 CORE_SOURCE_FILES = [
-  'src/core/profiling/basic_timers.c',
-  'src/core/profiling/stap_timers.c',
-  'src/core/support/alloc.c',
-  'src/core/support/avl.c',
-  'src/core/support/cmdline.c',
-  'src/core/support/cpu_iphone.c',
-  'src/core/support/cpu_linux.c',
-  'src/core/support/cpu_posix.c',
-  'src/core/support/cpu_windows.c',
-  'src/core/support/env_linux.c',
-  'src/core/support/env_posix.c',
-  'src/core/support/env_win32.c',
-  'src/core/support/file.c',
-  'src/core/support/file_posix.c',
-  'src/core/support/file_win32.c',
-  'src/core/support/histogram.c',
-  'src/core/support/host_port.c',
-  'src/core/support/log.c',
-  'src/core/support/log_android.c',
-  'src/core/support/log_linux.c',
-  'src/core/support/log_posix.c',
-  'src/core/support/log_win32.c',
-  'src/core/support/murmur_hash.c',
-  'src/core/support/slice.c',
-  'src/core/support/slice_buffer.c',
-  'src/core/support/stack_lockfree.c',
-  'src/core/support/string.c',
-  'src/core/support/string_posix.c',
-  'src/core/support/string_win32.c',
-  'src/core/support/subprocess_posix.c',
-  'src/core/support/subprocess_windows.c',
-  'src/core/support/sync.c',
-  'src/core/support/sync_posix.c',
-  'src/core/support/sync_win32.c',
-  'src/core/support/thd.c',
-  'src/core/support/thd_posix.c',
-  'src/core/support/thd_win32.c',
-  'src/core/support/time.c',
-  'src/core/support/time_posix.c',
-  'src/core/support/time_precise.c',
-  'src/core/support/time_win32.c',
-  'src/core/support/tls_pthread.c',
   'src/core/httpcli/httpcli_security_connector.c',
   'src/core/security/base64.c',
   'src/core/security/client_auth_filter.c',
@@ -220,12 +178,54 @@ CORE_SOURCE_FILES = [
   'src/core/transport/static_metadata.c',
   'src/core/transport/transport.c',
   'src/core/transport/transport_op_string.c',
+  'src/core/profiling/basic_timers.c',
+  'src/core/profiling/stap_timers.c',
+  'src/core/support/alloc.c',
+  'src/core/support/avl.c',
+  'src/core/support/cmdline.c',
+  'src/core/support/cpu_iphone.c',
+  'src/core/support/cpu_linux.c',
+  'src/core/support/cpu_posix.c',
+  'src/core/support/cpu_windows.c',
+  'src/core/support/env_linux.c',
+  'src/core/support/env_posix.c',
+  'src/core/support/env_win32.c',
+  'src/core/support/file.c',
+  'src/core/support/file_posix.c',
+  'src/core/support/file_win32.c',
+  'src/core/support/histogram.c',
+  'src/core/support/host_port.c',
+  'src/core/support/log.c',
+  'src/core/support/log_android.c',
+  'src/core/support/log_linux.c',
+  'src/core/support/log_posix.c',
+  'src/core/support/log_win32.c',
+  'src/core/support/murmur_hash.c',
+  'src/core/support/slice.c',
+  'src/core/support/slice_buffer.c',
+  'src/core/support/stack_lockfree.c',
+  'src/core/support/string.c',
+  'src/core/support/string_posix.c',
+  'src/core/support/string_win32.c',
+  'src/core/support/subprocess_posix.c',
+  'src/core/support/subprocess_windows.c',
+  'src/core/support/sync.c',
+  'src/core/support/sync_posix.c',
+  'src/core/support/sync_win32.c',
+  'src/core/support/thd.c',
+  'src/core/support/thd_posix.c',
+  'src/core/support/thd_win32.c',
+  'src/core/support/time.c',
+  'src/core/support/time_posix.c',
+  'src/core/support/time_precise.c',
+  'src/core/support/time_win32.c',
+  'src/core/support/tls_pthread.c',
+  'src/core/support/wrap_memcpy.c',
   'src/core/census/context.c',
   'src/core/census/initialize.c',
   'src/core/census/log.c',
   'src/core/census/operation.c',
   'src/core/census/placeholders.c',
-  'src/core/census/tag_set.c',
   'src/core/census/tracing.c',
   'src/boringssl/err_data.c',
   'third_party/boringssl/crypto/aes/aes.c',
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index 018353ce5d..426a6e67a0 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -54,8 +54,7 @@ LIB_DIRS = [
   LIBDIR
 ]
 
-fail 'libdl not found' unless have_library('dl', 'dlopen')
-fail 'zlib not found' unless have_library('z', 'inflate')
+windows = RUBY_PLATFORM =~ /mingw|mswin/
 
 grpc_root = File.expand_path(File.join(File.dirname(__FILE__), '../../../..'))
 
@@ -64,29 +63,64 @@ grpc_config = ENV['GRPC_CONFIG'] || 'opt'
 if ENV.key?('GRPC_LIB_DIR')
   grpc_lib_dir = File.join(grpc_root, ENV['GRPC_LIB_DIR'])
 else
-  grpc_lib_dir = File.join(File.join(grpc_root, 'libs'), grpc_config)
+  grpc_lib_dir = File.join(grpc_root, 'libs', grpc_config)
 end
 
-unless File.exist?(File.join(grpc_lib_dir, 'libgrpc.a'))
-  print "Building internal gRPC\n"
-  system("make -C #{grpc_root} static_c CONFIG=#{grpc_config}")
+unless File.exist?(File.join(grpc_lib_dir, 'libgrpc.a')) or windows
+  ENV['AR'] = RbConfig::CONFIG['AR'] + ' rcs'
+  ENV['CC'] = RbConfig::CONFIG['CC']
+  ENV['LD'] = ENV['CC']
+
+  ENV['AR'] = 'libtool -o' if RUBY_PLATFORM =~ /darwin/
+
+  ENV['EMBED_OPENSSL'] = 'true'
+  ENV['EMBED_ZLIB'] = 'true'
+  ENV['ARCH_FLAGS'] = '-arch i386 -arch x86_64' if RUBY_PLATFORM =~ /darwin/
+
+  output_dir = File.expand_path(RbConfig::CONFIG['topdir'])
+  grpc_lib_dir = File.join(output_dir, 'libs', grpc_config)
+  ENV['BUILDDIR'] = output_dir
+
+  puts 'Building internal gRPC into ' + grpc_lib_dir
+  system("make -j -C #{grpc_root} #{grpc_lib_dir}/libgrpc.a CONFIG=#{grpc_config}")
+  exit 1 unless $? == 0
 end
 
 $CFLAGS << ' -I' + File.join(grpc_root, 'include')
-$LDFLAGS << ' ' + File.join(grpc_lib_dir, 'libgrpc.a')
-$LDFLAGS << ' ' + File.join(grpc_lib_dir, 'libgpr.a')
+$LDFLAGS << ' ' + File.join(grpc_lib_dir, 'libgrpc.a') unless windows
 if grpc_config == 'gcov'
   $CFLAGS << ' -O0 -fprofile-arcs -ftest-coverage'
   $LDFLAGS << ' -fprofile-arcs -ftest-coverage -rdynamic'
 end
 
+$LDFLAGS << ' -Wl,-wrap,memcpy' if RUBY_PLATFORM =~ /linux/
+$LDFLAGS << ' -static' if windows
+
 $CFLAGS << ' -std=c99 '
 $CFLAGS << ' -Wall '
 $CFLAGS << ' -Wextra '
 $CFLAGS << ' -pedantic '
 $CFLAGS << ' -Werror '
-
-$LDFLAGS << ' -lssl '
-$LDFLAGS << ' -lcrypto '
-
-create_makefile('grpc/grpc')
+$CFLAGS << ' -Wno-format '
+
+output = File.join('grpc', 'grpc_c')
+puts 'Generating Makefile for ' + output
+create_makefile(output)
+
+strip_tool = RbConfig::CONFIG['STRIP']
+strip_tool = 'strip -x' if RUBY_PLATFORM =~ /darwin/
+
+if grpc_config == 'opt'
+  File.open('Makefile.new', 'w') do |o|
+    o.puts 'hijack: all strip'
+    o.puts
+    File.foreach('Makefile') do |i|
+      o.puts i
+    end
+    o.puts
+    o.puts 'strip:'
+    o.puts "\t$(ECHO) Stripping $(DLLIB)"
+    o.puts "\t$(Q) #{strip_tool} $(DLLIB)"
+  end
+  File.rename('Makefile.new', 'Makefile')
+end
diff --git a/src/ruby/ext/grpc/rb_byte_buffer.c b/src/ruby/ext/grpc/rb_byte_buffer.c
index 0aa34c844e..db7cac363a 100644
--- a/src/ruby/ext/grpc/rb_byte_buffer.c
+++ b/src/ruby/ext/grpc/rb_byte_buffer.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
  *
  */
 
+#include <ruby/ruby.h>
+#include "rb_grpc_imports.generated.h"
 #include "rb_byte_buffer.h"
 
 #include <ruby/ruby.h>
diff --git a/src/ruby/ext/grpc/rb_call.c b/src/ruby/ext/grpc/rb_call.c
index 07864ebf59..af05ddf6e7 100644
--- a/src/ruby/ext/grpc/rb_call.c
+++ b/src/ruby/ext/grpc/rb_call.c
@@ -31,6 +31,8 @@
  *
  */
 
+#include <ruby/ruby.h>
+#include "rb_grpc_imports.generated.h"
 #include "rb_call.h"
 
 #include <ruby/ruby.h>
diff --git a/src/ruby/ext/grpc/rb_call_credentials.c b/src/ruby/ext/grpc/rb_call_credentials.c
index ebcc6592c2..2426f106a9 100644
--- a/src/ruby/ext/grpc/rb_call_credentials.c
+++ b/src/ruby/ext/grpc/rb_call_credentials.c
@@ -31,6 +31,8 @@
  *
  */
 
+#include <ruby/ruby.h>
+#include "rb_grpc_imports.generated.h"
 #include "rb_call_credentials.h"
 
 #include <ruby/ruby.h>
diff --git a/src/ruby/ext/grpc/rb_channel.c b/src/ruby/ext/grpc/rb_channel.c
index 2fb8a5cdf0..d1e48753f2 100644
--- a/src/ruby/ext/grpc/rb_channel.c
+++ b/src/ruby/ext/grpc/rb_channel.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
  *
  */
 
+#include <ruby/ruby.h>
+#include "rb_grpc_imports.generated.h"
 #include "rb_channel.h"
 
 #include <ruby/ruby.h>
diff --git a/src/ruby/ext/grpc/rb_channel_args.c b/src/ruby/ext/grpc/rb_channel_args.c
index 37dd981925..69827cea1c 100644
--- a/src/ruby/ext/grpc/rb_channel_args.c
+++ b/src/ruby/ext/grpc/rb_channel_args.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
  *
  */
 
+#include <ruby/ruby.h>
+#include "rb_grpc_imports.generated.h"
 #include "rb_channel_args.h"
 
 #include <ruby/ruby.h>
diff --git a/src/ruby/ext/grpc/rb_channel_credentials.c b/src/ruby/ext/grpc/rb_channel_credentials.c
index 3530081c6b..8c6fc3b7eb 100644
--- a/src/ruby/ext/grpc/rb_channel_credentials.c
+++ b/src/ruby/ext/grpc/rb_channel_credentials.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
  *
  */
 
+#include <ruby/ruby.h>
+#include "rb_grpc_imports.generated.h"
 #include "rb_channel_credentials.h"
 
 #include <ruby/ruby.h>
diff --git a/src/ruby/ext/grpc/rb_completion_queue.c b/src/ruby/ext/grpc/rb_completion_queue.c
index a7de96d718..1eb5a28750 100644
--- a/src/ruby/ext/grpc/rb_completion_queue.c
+++ b/src/ruby/ext/grpc/rb_completion_queue.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
  *
  */
 
+#include <ruby/ruby.h>
+#include "rb_grpc_imports.generated.h"
 #include "rb_completion_queue.h"
 
 #include <ruby/ruby.h>
diff --git a/src/ruby/ext/grpc/rb_event_thread.c b/src/ruby/ext/grpc/rb_event_thread.c
index 516f0bdad2..2649a1087f 100644
--- a/src/ruby/ext/grpc/rb_event_thread.c
+++ b/src/ruby/ext/grpc/rb_event_thread.c
@@ -31,6 +31,8 @@
  *
  */
 
+#include <ruby/ruby.h>
+#include "rb_grpc_imports.generated.h"
 #include "rb_event_thread.h"
 
 #include <stdbool.h>
diff --git a/src/ruby/ext/grpc/rb_grpc.c b/src/ruby/ext/grpc/rb_grpc.c
index 265ab58ecb..eefdb93d67 100644
--- a/src/ruby/ext/grpc/rb_grpc.c
+++ b/src/ruby/ext/grpc/rb_grpc.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
  *
  */
 
+#include <ruby/ruby.h>
+#include "rb_grpc_imports.generated.h"
 #include "rb_grpc.h"
 
 #include <math.h>
@@ -45,6 +47,7 @@
 #include "rb_channel.h"
 #include "rb_channel_credentials.h"
 #include "rb_completion_queue.h"
+#include "rb_loader.h"
 #include "rb_server.h"
 #include "rb_server_credentials.h"
 
@@ -297,7 +300,12 @@ VALUE sym_code = Qundef;
 VALUE sym_details = Qundef;
 VALUE sym_metadata = Qundef;
 
-void Init_grpc() {
+void Init_grpc_c() {
+  if (!grpc_rb_load_core()) {
+    rb_raise(rb_eLoadError, "Couldn't find or load gRPC's dynamic C core");
+    return;
+  }
+
   grpc_init();
 
 /* TODO: find alternative to ruby_vm_at_exit that is ok in Ruby 2.0 */
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.c b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
new file mode 100644
index 0000000000..d4ddb734c0
--- /dev/null
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
@@ -0,0 +1,560 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WIN32
+
+#include "rb_grpc_imports.generated.h"
+
+census_initialize_type census_initialize_import;
+census_shutdown_type census_shutdown_import;
+census_supported_type census_supported_import;
+census_enabled_type census_enabled_import;
+census_context_create_type census_context_create_import;
+census_context_destroy_type census_context_destroy_import;
+census_context_get_status_type census_context_get_status_import;
+census_context_initialize_iterator_type census_context_initialize_iterator_import;
+census_context_next_tag_type census_context_next_tag_import;
+census_context_get_tag_type census_context_get_tag_import;
+census_context_encode_type census_context_encode_import;
+census_context_decode_type census_context_decode_import;
+census_trace_mask_type census_trace_mask_import;
+census_set_trace_mask_type census_set_trace_mask_import;
+census_start_rpc_op_timestamp_type census_start_rpc_op_timestamp_import;
+census_start_client_rpc_op_type census_start_client_rpc_op_import;
+census_set_rpc_client_peer_type census_set_rpc_client_peer_import;
+census_start_server_rpc_op_type census_start_server_rpc_op_import;
+census_start_op_type census_start_op_import;
+census_end_op_type census_end_op_import;
+census_trace_print_type census_trace_print_import;
+census_trace_scan_start_type census_trace_scan_start_import;
+census_get_trace_record_type census_get_trace_record_import;
+census_trace_scan_end_type census_trace_scan_end_import;
+census_record_values_type census_record_values_import;
+census_view_create_type census_view_create_import;
+census_view_delete_type census_view_delete_import;
+census_view_metric_type census_view_metric_import;
+census_view_naggregations_type census_view_naggregations_import;
+census_view_tags_type census_view_tags_import;
+census_view_aggregrations_type census_view_aggregrations_import;
+census_view_get_data_type census_view_get_data_import;
+census_view_reset_type census_view_reset_import;
+grpc_compression_algorithm_parse_type grpc_compression_algorithm_parse_import;
+grpc_compression_algorithm_name_type grpc_compression_algorithm_name_import;
+grpc_compression_algorithm_for_level_type grpc_compression_algorithm_for_level_import;
+grpc_compression_options_init_type grpc_compression_options_init_import;
+grpc_compression_options_enable_algorithm_type grpc_compression_options_enable_algorithm_import;
+grpc_compression_options_disable_algorithm_type grpc_compression_options_disable_algorithm_import;
+grpc_compression_options_is_algorithm_enabled_type grpc_compression_options_is_algorithm_enabled_import;
+grpc_metadata_array_init_type grpc_metadata_array_init_import;
+grpc_metadata_array_destroy_type grpc_metadata_array_destroy_import;
+grpc_call_details_init_type grpc_call_details_init_import;
+grpc_call_details_destroy_type grpc_call_details_destroy_import;
+grpc_register_plugin_type grpc_register_plugin_import;
+grpc_init_type grpc_init_import;
+grpc_shutdown_type grpc_shutdown_import;
+grpc_version_string_type grpc_version_string_import;
+grpc_completion_queue_create_type grpc_completion_queue_create_import;
+grpc_completion_queue_next_type grpc_completion_queue_next_import;
+grpc_completion_queue_pluck_type grpc_completion_queue_pluck_import;
+grpc_completion_queue_shutdown_type grpc_completion_queue_shutdown_import;
+grpc_completion_queue_destroy_type grpc_completion_queue_destroy_import;
+grpc_alarm_create_type grpc_alarm_create_import;
+grpc_alarm_cancel_type grpc_alarm_cancel_import;
+grpc_alarm_destroy_type grpc_alarm_destroy_import;
+grpc_channel_check_connectivity_state_type grpc_channel_check_connectivity_state_import;
+grpc_channel_watch_connectivity_state_type grpc_channel_watch_connectivity_state_import;
+grpc_channel_create_call_type grpc_channel_create_call_import;
+grpc_channel_ping_type grpc_channel_ping_import;
+grpc_channel_register_call_type grpc_channel_register_call_import;
+grpc_channel_create_registered_call_type grpc_channel_create_registered_call_import;
+grpc_call_start_batch_type grpc_call_start_batch_import;
+grpc_call_get_peer_type grpc_call_get_peer_import;
+grpc_census_call_set_context_type grpc_census_call_set_context_import;
+grpc_census_call_get_context_type grpc_census_call_get_context_import;
+grpc_channel_get_target_type grpc_channel_get_target_import;
+grpc_insecure_channel_create_type grpc_insecure_channel_create_import;
+grpc_lame_client_channel_create_type grpc_lame_client_channel_create_import;
+grpc_channel_destroy_type grpc_channel_destroy_import;
+grpc_call_cancel_type grpc_call_cancel_import;
+grpc_call_cancel_with_status_type grpc_call_cancel_with_status_import;
+grpc_call_destroy_type grpc_call_destroy_import;
+grpc_server_request_call_type grpc_server_request_call_import;
+grpc_server_register_method_type grpc_server_register_method_import;
+grpc_server_request_registered_call_type grpc_server_request_registered_call_import;
+grpc_server_create_type grpc_server_create_import;
+grpc_server_register_completion_queue_type grpc_server_register_completion_queue_import;
+grpc_server_add_insecure_http2_port_type grpc_server_add_insecure_http2_port_import;
+grpc_server_start_type grpc_server_start_import;
+grpc_server_shutdown_and_notify_type grpc_server_shutdown_and_notify_import;
+grpc_server_cancel_all_calls_type grpc_server_cancel_all_calls_import;
+grpc_server_destroy_type grpc_server_destroy_import;
+grpc_tracer_set_enabled_type grpc_tracer_set_enabled_import;
+grpc_header_key_is_legal_type grpc_header_key_is_legal_import;
+grpc_header_nonbin_value_is_legal_type grpc_header_nonbin_value_is_legal_import;
+grpc_is_binary_header_type grpc_is_binary_header_import;
+grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
+grpc_auth_context_property_iterator_type grpc_auth_context_property_iterator_import;
+grpc_auth_context_peer_identity_type grpc_auth_context_peer_identity_import;
+grpc_auth_context_find_properties_by_name_type grpc_auth_context_find_properties_by_name_import;
+grpc_auth_context_peer_identity_property_name_type grpc_auth_context_peer_identity_property_name_import;
+grpc_auth_context_peer_is_authenticated_type grpc_auth_context_peer_is_authenticated_import;
+grpc_call_auth_context_type grpc_call_auth_context_import;
+grpc_auth_context_release_type grpc_auth_context_release_import;
+grpc_auth_context_add_property_type grpc_auth_context_add_property_import;
+grpc_auth_context_add_cstring_property_type grpc_auth_context_add_cstring_property_import;
+grpc_auth_context_set_peer_identity_property_name_type grpc_auth_context_set_peer_identity_property_name_import;
+grpc_channel_credentials_release_type grpc_channel_credentials_release_import;
+grpc_google_default_credentials_create_type grpc_google_default_credentials_create_import;
+grpc_ssl_credentials_create_type grpc_ssl_credentials_create_import;
+grpc_call_credentials_release_type grpc_call_credentials_release_import;
+grpc_composite_channel_credentials_create_type grpc_composite_channel_credentials_create_import;
+grpc_composite_call_credentials_create_type grpc_composite_call_credentials_create_import;
+grpc_google_compute_engine_credentials_create_type grpc_google_compute_engine_credentials_create_import;
+grpc_max_auth_token_lifetime_type grpc_max_auth_token_lifetime_import;
+grpc_service_account_jwt_access_credentials_create_type grpc_service_account_jwt_access_credentials_create_import;
+grpc_google_refresh_token_credentials_create_type grpc_google_refresh_token_credentials_create_import;
+grpc_access_token_credentials_create_type grpc_access_token_credentials_create_import;
+grpc_google_iam_credentials_create_type grpc_google_iam_credentials_create_import;
+grpc_metadata_credentials_create_from_plugin_type grpc_metadata_credentials_create_from_plugin_import;
+grpc_secure_channel_create_type grpc_secure_channel_create_import;
+grpc_server_credentials_release_type grpc_server_credentials_release_import;
+grpc_ssl_server_credentials_create_type grpc_ssl_server_credentials_create_import;
+grpc_server_add_secure_http2_port_type grpc_server_add_secure_http2_port_import;
+grpc_call_set_credentials_type grpc_call_set_credentials_import;
+grpc_server_credentials_set_auth_metadata_processor_type grpc_server_credentials_set_auth_metadata_processor_import;
+gpr_malloc_type gpr_malloc_import;
+gpr_free_type gpr_free_import;
+gpr_realloc_type gpr_realloc_import;
+gpr_malloc_aligned_type gpr_malloc_aligned_import;
+gpr_free_aligned_type gpr_free_aligned_import;
+gpr_set_allocation_functions_type gpr_set_allocation_functions_import;
+gpr_get_allocation_functions_type gpr_get_allocation_functions_import;
+grpc_raw_byte_buffer_create_type grpc_raw_byte_buffer_create_import;
+grpc_raw_compressed_byte_buffer_create_type grpc_raw_compressed_byte_buffer_create_import;
+grpc_byte_buffer_copy_type grpc_byte_buffer_copy_import;
+grpc_byte_buffer_length_type grpc_byte_buffer_length_import;
+grpc_byte_buffer_destroy_type grpc_byte_buffer_destroy_import;
+grpc_byte_buffer_reader_init_type grpc_byte_buffer_reader_init_import;
+grpc_byte_buffer_reader_destroy_type grpc_byte_buffer_reader_destroy_import;
+grpc_byte_buffer_reader_next_type grpc_byte_buffer_reader_next_import;
+grpc_byte_buffer_reader_readall_type grpc_byte_buffer_reader_readall_import;
+grpc_raw_byte_buffer_from_reader_type grpc_raw_byte_buffer_from_reader_import;
+gpr_log_type gpr_log_import;
+gpr_log_message_type gpr_log_message_import;
+gpr_set_log_function_type gpr_set_log_function_import;
+gpr_slice_ref_type gpr_slice_ref_import;
+gpr_slice_unref_type gpr_slice_unref_import;
+gpr_slice_new_type gpr_slice_new_import;
+gpr_slice_new_with_len_type gpr_slice_new_with_len_import;
+gpr_slice_malloc_type gpr_slice_malloc_import;
+gpr_slice_from_copied_string_type gpr_slice_from_copied_string_import;
+gpr_slice_from_copied_buffer_type gpr_slice_from_copied_buffer_import;
+gpr_slice_from_static_string_type gpr_slice_from_static_string_import;
+gpr_slice_sub_type gpr_slice_sub_import;
+gpr_slice_sub_no_ref_type gpr_slice_sub_no_ref_import;
+gpr_slice_split_tail_type gpr_slice_split_tail_import;
+gpr_slice_split_head_type gpr_slice_split_head_import;
+gpr_empty_slice_type gpr_empty_slice_import;
+gpr_slice_cmp_type gpr_slice_cmp_import;
+gpr_slice_str_cmp_type gpr_slice_str_cmp_import;
+gpr_slice_buffer_init_type gpr_slice_buffer_init_import;
+gpr_slice_buffer_destroy_type gpr_slice_buffer_destroy_import;
+gpr_slice_buffer_add_type gpr_slice_buffer_add_import;
+gpr_slice_buffer_add_indexed_type gpr_slice_buffer_add_indexed_import;
+gpr_slice_buffer_addn_type gpr_slice_buffer_addn_import;
+gpr_slice_buffer_tiny_add_type gpr_slice_buffer_tiny_add_import;
+gpr_slice_buffer_pop_type gpr_slice_buffer_pop_import;
+gpr_slice_buffer_reset_and_unref_type gpr_slice_buffer_reset_and_unref_import;
+gpr_slice_buffer_swap_type gpr_slice_buffer_swap_import;
+gpr_slice_buffer_move_into_type gpr_slice_buffer_move_into_import;
+gpr_slice_buffer_trim_end_type gpr_slice_buffer_trim_end_import;
+gpr_slice_buffer_move_first_type gpr_slice_buffer_move_first_import;
+gpr_slice_buffer_take_first_type gpr_slice_buffer_take_first_import;
+gpr_mu_init_type gpr_mu_init_import;
+gpr_mu_destroy_type gpr_mu_destroy_import;
+gpr_mu_lock_type gpr_mu_lock_import;
+gpr_mu_unlock_type gpr_mu_unlock_import;
+gpr_mu_trylock_type gpr_mu_trylock_import;
+gpr_cv_init_type gpr_cv_init_import;
+gpr_cv_destroy_type gpr_cv_destroy_import;
+gpr_cv_wait_type gpr_cv_wait_import;
+gpr_cv_signal_type gpr_cv_signal_import;
+gpr_cv_broadcast_type gpr_cv_broadcast_import;
+gpr_once_init_type gpr_once_init_import;
+gpr_event_init_type gpr_event_init_import;
+gpr_event_set_type gpr_event_set_import;
+gpr_event_get_type gpr_event_get_import;
+gpr_event_wait_type gpr_event_wait_import;
+gpr_ref_init_type gpr_ref_init_import;
+gpr_ref_type gpr_ref_import;
+gpr_refn_type gpr_refn_import;
+gpr_unref_type gpr_unref_import;
+gpr_stats_init_type gpr_stats_init_import;
+gpr_stats_inc_type gpr_stats_inc_import;
+gpr_stats_read_type gpr_stats_read_import;
+gpr_time_0_type gpr_time_0_import;
+gpr_inf_future_type gpr_inf_future_import;
+gpr_inf_past_type gpr_inf_past_import;
+gpr_time_init_type gpr_time_init_import;
+gpr_now_type gpr_now_import;
+gpr_convert_clock_type_type gpr_convert_clock_type_import;
+gpr_time_cmp_type gpr_time_cmp_import;
+gpr_time_max_type gpr_time_max_import;
+gpr_time_min_type gpr_time_min_import;
+gpr_time_add_type gpr_time_add_import;
+gpr_time_sub_type gpr_time_sub_import;
+gpr_time_from_micros_type gpr_time_from_micros_import;
+gpr_time_from_nanos_type gpr_time_from_nanos_import;
+gpr_time_from_millis_type gpr_time_from_millis_import;
+gpr_time_from_seconds_type gpr_time_from_seconds_import;
+gpr_time_from_minutes_type gpr_time_from_minutes_import;
+gpr_time_from_hours_type gpr_time_from_hours_import;
+gpr_time_to_millis_type gpr_time_to_millis_import;
+gpr_time_similar_type gpr_time_similar_import;
+gpr_sleep_until_type gpr_sleep_until_import;
+gpr_timespec_to_micros_type gpr_timespec_to_micros_import;
+gpr_avl_create_type gpr_avl_create_import;
+gpr_avl_ref_type gpr_avl_ref_import;
+gpr_avl_unref_type gpr_avl_unref_import;
+gpr_avl_add_type gpr_avl_add_import;
+gpr_avl_remove_type gpr_avl_remove_import;
+gpr_avl_get_type gpr_avl_get_import;
+gpr_cmdline_create_type gpr_cmdline_create_import;
+gpr_cmdline_add_int_type gpr_cmdline_add_int_import;
+gpr_cmdline_add_flag_type gpr_cmdline_add_flag_import;
+gpr_cmdline_add_string_type gpr_cmdline_add_string_import;
+gpr_cmdline_on_extra_arg_type gpr_cmdline_on_extra_arg_import;
+gpr_cmdline_set_survive_failure_type gpr_cmdline_set_survive_failure_import;
+gpr_cmdline_parse_type gpr_cmdline_parse_import;
+gpr_cmdline_destroy_type gpr_cmdline_destroy_import;
+gpr_cmdline_usage_string_type gpr_cmdline_usage_string_import;
+gpr_cpu_num_cores_type gpr_cpu_num_cores_import;
+gpr_cpu_current_cpu_type gpr_cpu_current_cpu_import;
+gpr_histogram_create_type gpr_histogram_create_import;
+gpr_histogram_destroy_type gpr_histogram_destroy_import;
+gpr_histogram_add_type gpr_histogram_add_import;
+gpr_histogram_merge_type gpr_histogram_merge_import;
+gpr_histogram_percentile_type gpr_histogram_percentile_import;
+gpr_histogram_mean_type gpr_histogram_mean_import;
+gpr_histogram_stddev_type gpr_histogram_stddev_import;
+gpr_histogram_variance_type gpr_histogram_variance_import;
+gpr_histogram_maximum_type gpr_histogram_maximum_import;
+gpr_histogram_minimum_type gpr_histogram_minimum_import;
+gpr_histogram_count_type gpr_histogram_count_import;
+gpr_histogram_sum_type gpr_histogram_sum_import;
+gpr_histogram_sum_of_squares_type gpr_histogram_sum_of_squares_import;
+gpr_histogram_get_contents_type gpr_histogram_get_contents_import;
+gpr_histogram_merge_contents_type gpr_histogram_merge_contents_import;
+gpr_join_host_port_type gpr_join_host_port_import;
+gpr_split_host_port_type gpr_split_host_port_import;
+gpr_format_message_type gpr_format_message_import;
+gpr_strdup_type gpr_strdup_import;
+gpr_asprintf_type gpr_asprintf_import;
+gpr_subprocess_binary_extension_type gpr_subprocess_binary_extension_import;
+gpr_subprocess_create_type gpr_subprocess_create_import;
+gpr_subprocess_destroy_type gpr_subprocess_destroy_import;
+gpr_subprocess_join_type gpr_subprocess_join_import;
+gpr_subprocess_interrupt_type gpr_subprocess_interrupt_import;
+gpr_thd_new_type gpr_thd_new_import;
+gpr_thd_options_default_type gpr_thd_options_default_import;
+gpr_thd_options_set_detached_type gpr_thd_options_set_detached_import;
+gpr_thd_options_set_joinable_type gpr_thd_options_set_joinable_import;
+gpr_thd_options_is_detached_type gpr_thd_options_is_detached_import;
+gpr_thd_options_is_joinable_type gpr_thd_options_is_joinable_import;
+gpr_thd_currentid_type gpr_thd_currentid_import;
+gpr_thd_join_type gpr_thd_join_import;
+
+void grpc_rb_load_imports(HMODULE library) {
+  census_initialize_import = (census_initialize_type) GetProcAddress(library, "census_initialize");
+  census_shutdown_import = (census_shutdown_type) GetProcAddress(library, "census_shutdown");
+  census_supported_import = (census_supported_type) GetProcAddress(library, "census_supported");
+  census_enabled_import = (census_enabled_type) GetProcAddress(library, "census_enabled");
+  census_context_create_import = (census_context_create_type) GetProcAddress(library, "census_context_create");
+  census_context_destroy_import = (census_context_destroy_type) GetProcAddress(library, "census_context_destroy");
+  census_context_get_status_import = (census_context_get_status_type) GetProcAddress(library, "census_context_get_status");
+  census_context_initialize_iterator_import = (census_context_initialize_iterator_type) GetProcAddress(library, "census_context_initialize_iterator");
+  census_context_next_tag_import = (census_context_next_tag_type) GetProcAddress(library, "census_context_next_tag");
+  census_context_get_tag_import = (census_context_get_tag_type) GetProcAddress(library, "census_context_get_tag");
+  census_context_encode_import = (census_context_encode_type) GetProcAddress(library, "census_context_encode");
+  census_context_decode_import = (census_context_decode_type) GetProcAddress(library, "census_context_decode");
+  census_trace_mask_import = (census_trace_mask_type) GetProcAddress(library, "census_trace_mask");
+  census_set_trace_mask_import = (census_set_trace_mask_type) GetProcAddress(library, "census_set_trace_mask");
+  census_start_rpc_op_timestamp_import = (census_start_rpc_op_timestamp_type) GetProcAddress(library, "census_start_rpc_op_timestamp");
+  census_start_client_rpc_op_import = (census_start_client_rpc_op_type) GetProcAddress(library, "census_start_client_rpc_op");
+  census_set_rpc_client_peer_import = (census_set_rpc_client_peer_type) GetProcAddress(library, "census_set_rpc_client_peer");
+  census_start_server_rpc_op_import = (census_start_server_rpc_op_type) GetProcAddress(library, "census_start_server_rpc_op");
+  census_start_op_import = (census_start_op_type) GetProcAddress(library, "census_start_op");
+  census_end_op_import = (census_end_op_type) GetProcAddress(library, "census_end_op");
+  census_trace_print_import = (census_trace_print_type) GetProcAddress(library, "census_trace_print");
+  census_trace_scan_start_import = (census_trace_scan_start_type) GetProcAddress(library, "census_trace_scan_start");
+  census_get_trace_record_import = (census_get_trace_record_type) GetProcAddress(library, "census_get_trace_record");
+  census_trace_scan_end_import = (census_trace_scan_end_type) GetProcAddress(library, "census_trace_scan_end");
+  census_record_values_import = (census_record_values_type) GetProcAddress(library, "census_record_values");
+  census_view_create_import = (census_view_create_type) GetProcAddress(library, "census_view_create");
+  census_view_delete_import = (census_view_delete_type) GetProcAddress(library, "census_view_delete");
+  census_view_metric_import = (census_view_metric_type) GetProcAddress(library, "census_view_metric");
+  census_view_naggregations_import = (census_view_naggregations_type) GetProcAddress(library, "census_view_naggregations");
+  census_view_tags_import = (census_view_tags_type) GetProcAddress(library, "census_view_tags");
+  census_view_aggregrations_import = (census_view_aggregrations_type) GetProcAddress(library, "census_view_aggregrations");
+  census_view_get_data_import = (census_view_get_data_type) GetProcAddress(library, "census_view_get_data");
+  census_view_reset_import = (census_view_reset_type) GetProcAddress(library, "census_view_reset");
+  grpc_compression_algorithm_parse_import = (grpc_compression_algorithm_parse_type) GetProcAddress(library, "grpc_compression_algorithm_parse");
+  grpc_compression_algorithm_name_import = (grpc_compression_algorithm_name_type) GetProcAddress(library, "grpc_compression_algorithm_name");
+  grpc_compression_algorithm_for_level_import = (grpc_compression_algorithm_for_level_type) GetProcAddress(library, "grpc_compression_algorithm_for_level");
+  grpc_compression_options_init_import = (grpc_compression_options_init_type) GetProcAddress(library, "grpc_compression_options_init");
+  grpc_compression_options_enable_algorithm_import = (grpc_compression_options_enable_algorithm_type) GetProcAddress(library, "grpc_compression_options_enable_algorithm");
+  grpc_compression_options_disable_algorithm_import = (grpc_compression_options_disable_algorithm_type) GetProcAddress(library, "grpc_compression_options_disable_algorithm");
+  grpc_compression_options_is_algorithm_enabled_import = (grpc_compression_options_is_algorithm_enabled_type) GetProcAddress(library, "grpc_compression_options_is_algorithm_enabled");
+  grpc_metadata_array_init_import = (grpc_metadata_array_init_type) GetProcAddress(library, "grpc_metadata_array_init");
+  grpc_metadata_array_destroy_import = (grpc_metadata_array_destroy_type) GetProcAddress(library, "grpc_metadata_array_destroy");
+  grpc_call_details_init_import = (grpc_call_details_init_type) GetProcAddress(library, "grpc_call_details_init");
+  grpc_call_details_destroy_import = (grpc_call_details_destroy_type) GetProcAddress(library, "grpc_call_details_destroy");
+  grpc_register_plugin_import = (grpc_register_plugin_type) GetProcAddress(library, "grpc_register_plugin");
+  grpc_init_import = (grpc_init_type) GetProcAddress(library, "grpc_init");
+  grpc_shutdown_import = (grpc_shutdown_type) GetProcAddress(library, "grpc_shutdown");
+  grpc_version_string_import = (grpc_version_string_type) GetProcAddress(library, "grpc_version_string");
+  grpc_completion_queue_create_import = (grpc_completion_queue_create_type) GetProcAddress(library, "grpc_completion_queue_create");
+  grpc_completion_queue_next_import = (grpc_completion_queue_next_type) GetProcAddress(library, "grpc_completion_queue_next");
+  grpc_completion_queue_pluck_import = (grpc_completion_queue_pluck_type) GetProcAddress(library, "grpc_completion_queue_pluck");
+  grpc_completion_queue_shutdown_import = (grpc_completion_queue_shutdown_type) GetProcAddress(library, "grpc_completion_queue_shutdown");
+  grpc_completion_queue_destroy_import = (grpc_completion_queue_destroy_type) GetProcAddress(library, "grpc_completion_queue_destroy");
+  grpc_alarm_create_import = (grpc_alarm_create_type) GetProcAddress(library, "grpc_alarm_create");
+  grpc_alarm_cancel_import = (grpc_alarm_cancel_type) GetProcAddress(library, "grpc_alarm_cancel");
+  grpc_alarm_destroy_import = (grpc_alarm_destroy_type) GetProcAddress(library, "grpc_alarm_destroy");
+  grpc_channel_check_connectivity_state_import = (grpc_channel_check_connectivity_state_type) GetProcAddress(library, "grpc_channel_check_connectivity_state");
+  grpc_channel_watch_connectivity_state_import = (grpc_channel_watch_connectivity_state_type) GetProcAddress(library, "grpc_channel_watch_connectivity_state");
+  grpc_channel_create_call_import = (grpc_channel_create_call_type) GetProcAddress(library, "grpc_channel_create_call");
+  grpc_channel_ping_import = (grpc_channel_ping_type) GetProcAddress(library, "grpc_channel_ping");
+  grpc_channel_register_call_import = (grpc_channel_register_call_type) GetProcAddress(library, "grpc_channel_register_call");
+  grpc_channel_create_registered_call_import = (grpc_channel_create_registered_call_type) GetProcAddress(library, "grpc_channel_create_registered_call");
+  grpc_call_start_batch_import = (grpc_call_start_batch_type) GetProcAddress(library, "grpc_call_start_batch");
+  grpc_call_get_peer_import = (grpc_call_get_peer_type) GetProcAddress(library, "grpc_call_get_peer");
+  grpc_census_call_set_context_import = (grpc_census_call_set_context_type) GetProcAddress(library, "grpc_census_call_set_context");
+  grpc_census_call_get_context_import = (grpc_census_call_get_context_type) GetProcAddress(library, "grpc_census_call_get_context");
+  grpc_channel_get_target_import = (grpc_channel_get_target_type) GetProcAddress(library, "grpc_channel_get_target");
+  grpc_insecure_channel_create_import = (grpc_insecure_channel_create_type) GetProcAddress(library, "grpc_insecure_channel_create");
+  grpc_lame_client_channel_create_import = (grpc_lame_client_channel_create_type) GetProcAddress(library, "grpc_lame_client_channel_create");
+  grpc_channel_destroy_import = (grpc_channel_destroy_type) GetProcAddress(library, "grpc_channel_destroy");
+  grpc_call_cancel_import = (grpc_call_cancel_type) GetProcAddress(library, "grpc_call_cancel");
+  grpc_call_cancel_with_status_import = (grpc_call_cancel_with_status_type) GetProcAddress(library, "grpc_call_cancel_with_status");
+  grpc_call_destroy_import = (grpc_call_destroy_type) GetProcAddress(library, "grpc_call_destroy");
+  grpc_server_request_call_import = (grpc_server_request_call_type) GetProcAddress(library, "grpc_server_request_call");
+  grpc_server_register_method_import = (grpc_server_register_method_type) GetProcAddress(library, "grpc_server_register_method");
+  grpc_server_request_registered_call_import = (grpc_server_request_registered_call_type) GetProcAddress(library, "grpc_server_request_registered_call");
+  grpc_server_create_import = (grpc_server_create_type) GetProcAddress(library, "grpc_server_create");
+  grpc_server_register_completion_queue_import = (grpc_server_register_completion_queue_type) GetProcAddress(library, "grpc_server_register_completion_queue");
+  grpc_server_add_insecure_http2_port_import = (grpc_server_add_insecure_http2_port_type) GetProcAddress(library, "grpc_server_add_insecure_http2_port");
+  grpc_server_start_import = (grpc_server_start_type) GetProcAddress(library, "grpc_server_start");
+  grpc_server_shutdown_and_notify_import = (grpc_server_shutdown_and_notify_type) GetProcAddress(library, "grpc_server_shutdown_and_notify");
+  grpc_server_cancel_all_calls_import = (grpc_server_cancel_all_calls_type) GetProcAddress(library, "grpc_server_cancel_all_calls");
+  grpc_server_destroy_import = (grpc_server_destroy_type) GetProcAddress(library, "grpc_server_destroy");
+  grpc_tracer_set_enabled_import = (grpc_tracer_set_enabled_type) GetProcAddress(library, "grpc_tracer_set_enabled");
+  grpc_header_key_is_legal_import = (grpc_header_key_is_legal_type) GetProcAddress(library, "grpc_header_key_is_legal");
+  grpc_header_nonbin_value_is_legal_import = (grpc_header_nonbin_value_is_legal_type) GetProcAddress(library, "grpc_header_nonbin_value_is_legal");
+  grpc_is_binary_header_import = (grpc_is_binary_header_type) GetProcAddress(library, "grpc_is_binary_header");
+  grpc_auth_property_iterator_next_import = (grpc_auth_property_iterator_next_type) GetProcAddress(library, "grpc_auth_property_iterator_next");
+  grpc_auth_context_property_iterator_import = (grpc_auth_context_property_iterator_type) GetProcAddress(library, "grpc_auth_context_property_iterator");
+  grpc_auth_context_peer_identity_import = (grpc_auth_context_peer_identity_type) GetProcAddress(library, "grpc_auth_context_peer_identity");
+  grpc_auth_context_find_properties_by_name_import = (grpc_auth_context_find_properties_by_name_type) GetProcAddress(library, "grpc_auth_context_find_properties_by_name");
+  grpc_auth_context_peer_identity_property_name_import = (grpc_auth_context_peer_identity_property_name_type) GetProcAddress(library, "grpc_auth_context_peer_identity_property_name");
+  grpc_auth_context_peer_is_authenticated_import = (grpc_auth_context_peer_is_authenticated_type) GetProcAddress(library, "grpc_auth_context_peer_is_authenticated");
+  grpc_call_auth_context_import = (grpc_call_auth_context_type) GetProcAddress(library, "grpc_call_auth_context");
+  grpc_auth_context_release_import = (grpc_auth_context_release_type) GetProcAddress(library, "grpc_auth_context_release");
+  grpc_auth_context_add_property_import = (grpc_auth_context_add_property_type) GetProcAddress(library, "grpc_auth_context_add_property");
+  grpc_auth_context_add_cstring_property_import = (grpc_auth_context_add_cstring_property_type) GetProcAddress(library, "grpc_auth_context_add_cstring_property");
+  grpc_auth_context_set_peer_identity_property_name_import = (grpc_auth_context_set_peer_identity_property_name_type) GetProcAddress(library, "grpc_auth_context_set_peer_identity_property_name");
+  grpc_channel_credentials_release_import = (grpc_channel_credentials_release_type) GetProcAddress(library, "grpc_channel_credentials_release");
+  grpc_google_default_credentials_create_import = (grpc_google_default_credentials_create_type) GetProcAddress(library, "grpc_google_default_credentials_create");
+  grpc_ssl_credentials_create_import = (grpc_ssl_credentials_create_type) GetProcAddress(library, "grpc_ssl_credentials_create");
+  grpc_call_credentials_release_import = (grpc_call_credentials_release_type) GetProcAddress(library, "grpc_call_credentials_release");
+  grpc_composite_channel_credentials_create_import = (grpc_composite_channel_credentials_create_type) GetProcAddress(library, "grpc_composite_channel_credentials_create");
+  grpc_composite_call_credentials_create_import = (grpc_composite_call_credentials_create_type) GetProcAddress(library, "grpc_composite_call_credentials_create");
+  grpc_google_compute_engine_credentials_create_import = (grpc_google_compute_engine_credentials_create_type) GetProcAddress(library, "grpc_google_compute_engine_credentials_create");
+  grpc_max_auth_token_lifetime_import = (grpc_max_auth_token_lifetime_type) GetProcAddress(library, "grpc_max_auth_token_lifetime");
+  grpc_service_account_jwt_access_credentials_create_import = (grpc_service_account_jwt_access_credentials_create_type) GetProcAddress(library, "grpc_service_account_jwt_access_credentials_create");
+  grpc_google_refresh_token_credentials_create_import = (grpc_google_refresh_token_credentials_create_type) GetProcAddress(library, "grpc_google_refresh_token_credentials_create");
+  grpc_access_token_credentials_create_import = (grpc_access_token_credentials_create_type) GetProcAddress(library, "grpc_access_token_credentials_create");
+  grpc_google_iam_credentials_create_import = (grpc_google_iam_credentials_create_type) GetProcAddress(library, "grpc_google_iam_credentials_create");
+  grpc_metadata_credentials_create_from_plugin_import = (grpc_metadata_credentials_create_from_plugin_type) GetProcAddress(library, "grpc_metadata_credentials_create_from_plugin");
+  grpc_secure_channel_create_import = (grpc_secure_channel_create_type) GetProcAddress(library, "grpc_secure_channel_create");
+  grpc_server_credentials_release_import = (grpc_server_credentials_release_type) GetProcAddress(library, "grpc_server_credentials_release");
+  grpc_ssl_server_credentials_create_import = (grpc_ssl_server_credentials_create_type) GetProcAddress(library, "grpc_ssl_server_credentials_create");
+  grpc_server_add_secure_http2_port_import = (grpc_server_add_secure_http2_port_type) GetProcAddress(library, "grpc_server_add_secure_http2_port");
+  grpc_call_set_credentials_import = (grpc_call_set_credentials_type) GetProcAddress(library, "grpc_call_set_credentials");
+  grpc_server_credentials_set_auth_metadata_processor_import = (grpc_server_credentials_set_auth_metadata_processor_type) GetProcAddress(library, "grpc_server_credentials_set_auth_metadata_processor");
+  gpr_malloc_import = (gpr_malloc_type) GetProcAddress(library, "gpr_malloc");
+  gpr_free_import = (gpr_free_type) GetProcAddress(library, "gpr_free");
+  gpr_realloc_import = (gpr_realloc_type) GetProcAddress(library, "gpr_realloc");
+  gpr_malloc_aligned_import = (gpr_malloc_aligned_type) GetProcAddress(library, "gpr_malloc_aligned");
+  gpr_free_aligned_import = (gpr_free_aligned_type) GetProcAddress(library, "gpr_free_aligned");
+  gpr_set_allocation_functions_import = (gpr_set_allocation_functions_type) GetProcAddress(library, "gpr_set_allocation_functions");
+  gpr_get_allocation_functions_import = (gpr_get_allocation_functions_type) GetProcAddress(library, "gpr_get_allocation_functions");
+  grpc_raw_byte_buffer_create_import = (grpc_raw_byte_buffer_create_type) GetProcAddress(library, "grpc_raw_byte_buffer_create");
+  grpc_raw_compressed_byte_buffer_create_import = (grpc_raw_compressed_byte_buffer_create_type) GetProcAddress(library, "grpc_raw_compressed_byte_buffer_create");
+  grpc_byte_buffer_copy_import = (grpc_byte_buffer_copy_type) GetProcAddress(library, "grpc_byte_buffer_copy");
+  grpc_byte_buffer_length_import = (grpc_byte_buffer_length_type) GetProcAddress(library, "grpc_byte_buffer_length");
+  grpc_byte_buffer_destroy_import = (grpc_byte_buffer_destroy_type) GetProcAddress(library, "grpc_byte_buffer_destroy");
+  grpc_byte_buffer_reader_init_import = (grpc_byte_buffer_reader_init_type) GetProcAddress(library, "grpc_byte_buffer_reader_init");
+  grpc_byte_buffer_reader_destroy_import = (grpc_byte_buffer_reader_destroy_type) GetProcAddress(library, "grpc_byte_buffer_reader_destroy");
+  grpc_byte_buffer_reader_next_import = (grpc_byte_buffer_reader_next_type) GetProcAddress(library, "grpc_byte_buffer_reader_next");
+  grpc_byte_buffer_reader_readall_import = (grpc_byte_buffer_reader_readall_type) GetProcAddress(library, "grpc_byte_buffer_reader_readall");
+  grpc_raw_byte_buffer_from_reader_import = (grpc_raw_byte_buffer_from_reader_type) GetProcAddress(library, "grpc_raw_byte_buffer_from_reader");
+  gpr_log_import = (gpr_log_type) GetProcAddress(library, "gpr_log");
+  gpr_log_message_import = (gpr_log_message_type) GetProcAddress(library, "gpr_log_message");
+  gpr_set_log_function_import = (gpr_set_log_function_type) GetProcAddress(library, "gpr_set_log_function");
+  gpr_slice_ref_import = (gpr_slice_ref_type) GetProcAddress(library, "gpr_slice_ref");
+  gpr_slice_unref_import = (gpr_slice_unref_type) GetProcAddress(library, "gpr_slice_unref");
+  gpr_slice_new_import = (gpr_slice_new_type) GetProcAddress(library, "gpr_slice_new");
+  gpr_slice_new_with_len_import = (gpr_slice_new_with_len_type) GetProcAddress(library, "gpr_slice_new_with_len");
+  gpr_slice_malloc_import = (gpr_slice_malloc_type) GetProcAddress(library, "gpr_slice_malloc");
+  gpr_slice_from_copied_string_import = (gpr_slice_from_copied_string_type) GetProcAddress(library, "gpr_slice_from_copied_string");
+  gpr_slice_from_copied_buffer_import = (gpr_slice_from_copied_buffer_type) GetProcAddress(library, "gpr_slice_from_copied_buffer");
+  gpr_slice_from_static_string_import = (gpr_slice_from_static_string_type) GetProcAddress(library, "gpr_slice_from_static_string");
+  gpr_slice_sub_import = (gpr_slice_sub_type) GetProcAddress(library, "gpr_slice_sub");
+  gpr_slice_sub_no_ref_import = (gpr_slice_sub_no_ref_type) GetProcAddress(library, "gpr_slice_sub_no_ref");
+  gpr_slice_split_tail_import = (gpr_slice_split_tail_type) GetProcAddress(library, "gpr_slice_split_tail");
+  gpr_slice_split_head_import = (gpr_slice_split_head_type) GetProcAddress(library, "gpr_slice_split_head");
+  gpr_empty_slice_import = (gpr_empty_slice_type) GetProcAddress(library, "gpr_empty_slice");
+  gpr_slice_cmp_import = (gpr_slice_cmp_type) GetProcAddress(library, "gpr_slice_cmp");
+  gpr_slice_str_cmp_import = (gpr_slice_str_cmp_type) GetProcAddress(library, "gpr_slice_str_cmp");
+  gpr_slice_buffer_init_import = (gpr_slice_buffer_init_type) GetProcAddress(library, "gpr_slice_buffer_init");
+  gpr_slice_buffer_destroy_import = (gpr_slice_buffer_destroy_type) GetProcAddress(library, "gpr_slice_buffer_destroy");
+  gpr_slice_buffer_add_import = (gpr_slice_buffer_add_type) GetProcAddress(library, "gpr_slice_buffer_add");
+  gpr_slice_buffer_add_indexed_import = (gpr_slice_buffer_add_indexed_type) GetProcAddress(library, "gpr_slice_buffer_add_indexed");
+  gpr_slice_buffer_addn_import = (gpr_slice_buffer_addn_type) GetProcAddress(library, "gpr_slice_buffer_addn");
+  gpr_slice_buffer_tiny_add_import = (gpr_slice_buffer_tiny_add_type) GetProcAddress(library, "gpr_slice_buffer_tiny_add");
+  gpr_slice_buffer_pop_import = (gpr_slice_buffer_pop_type) GetProcAddress(library, "gpr_slice_buffer_pop");
+  gpr_slice_buffer_reset_and_unref_import = (gpr_slice_buffer_reset_and_unref_type) GetProcAddress(library, "gpr_slice_buffer_reset_and_unref");
+  gpr_slice_buffer_swap_import = (gpr_slice_buffer_swap_type) GetProcAddress(library, "gpr_slice_buffer_swap");
+  gpr_slice_buffer_move_into_import = (gpr_slice_buffer_move_into_type) GetProcAddress(library, "gpr_slice_buffer_move_into");
+  gpr_slice_buffer_trim_end_import = (gpr_slice_buffer_trim_end_type) GetProcAddress(library, "gpr_slice_buffer_trim_end");
+  gpr_slice_buffer_move_first_import = (gpr_slice_buffer_move_first_type) GetProcAddress(library, "gpr_slice_buffer_move_first");
+  gpr_slice_buffer_take_first_import = (gpr_slice_buffer_take_first_type) GetProcAddress(library, "gpr_slice_buffer_take_first");
+  gpr_mu_init_import = (gpr_mu_init_type) GetProcAddress(library, "gpr_mu_init");
+  gpr_mu_destroy_import = (gpr_mu_destroy_type) GetProcAddress(library, "gpr_mu_destroy");
+  gpr_mu_lock_import = (gpr_mu_lock_type) GetProcAddress(library, "gpr_mu_lock");
+  gpr_mu_unlock_import = (gpr_mu_unlock_type) GetProcAddress(library, "gpr_mu_unlock");
+  gpr_mu_trylock_import = (gpr_mu_trylock_type) GetProcAddress(library, "gpr_mu_trylock");
+  gpr_cv_init_import = (gpr_cv_init_type) GetProcAddress(library, "gpr_cv_init");
+  gpr_cv_destroy_import = (gpr_cv_destroy_type) GetProcAddress(library, "gpr_cv_destroy");
+  gpr_cv_wait_import = (gpr_cv_wait_type) GetProcAddress(library, "gpr_cv_wait");
+  gpr_cv_signal_import = (gpr_cv_signal_type) GetProcAddress(library, "gpr_cv_signal");
+  gpr_cv_broadcast_import = (gpr_cv_broadcast_type) GetProcAddress(library, "gpr_cv_broadcast");
+  gpr_once_init_import = (gpr_once_init_type) GetProcAddress(library, "gpr_once_init");
+  gpr_event_init_import = (gpr_event_init_type) GetProcAddress(library, "gpr_event_init");
+  gpr_event_set_import = (gpr_event_set_type) GetProcAddress(library, "gpr_event_set");
+  gpr_event_get_import = (gpr_event_get_type) GetProcAddress(library, "gpr_event_get");
+  gpr_event_wait_import = (gpr_event_wait_type) GetProcAddress(library, "gpr_event_wait");
+  gpr_ref_init_import = (gpr_ref_init_type) GetProcAddress(library, "gpr_ref_init");
+  gpr_ref_import = (gpr_ref_type) GetProcAddress(library, "gpr_ref");
+  gpr_refn_import = (gpr_refn_type) GetProcAddress(library, "gpr_refn");
+  gpr_unref_import = (gpr_unref_type) GetProcAddress(library, "gpr_unref");
+  gpr_stats_init_import = (gpr_stats_init_type) GetProcAddress(library, "gpr_stats_init");
+  gpr_stats_inc_import = (gpr_stats_inc_type) GetProcAddress(library, "gpr_stats_inc");
+  gpr_stats_read_import = (gpr_stats_read_type) GetProcAddress(library, "gpr_stats_read");
+  gpr_time_0_import = (gpr_time_0_type) GetProcAddress(library, "gpr_time_0");
+  gpr_inf_future_import = (gpr_inf_future_type) GetProcAddress(library, "gpr_inf_future");
+  gpr_inf_past_import = (gpr_inf_past_type) GetProcAddress(library, "gpr_inf_past");
+  gpr_time_init_import = (gpr_time_init_type) GetProcAddress(library, "gpr_time_init");
+  gpr_now_import = (gpr_now_type) GetProcAddress(library, "gpr_now");
+  gpr_convert_clock_type_import = (gpr_convert_clock_type_type) GetProcAddress(library, "gpr_convert_clock_type");
+  gpr_time_cmp_import = (gpr_time_cmp_type) GetProcAddress(library, "gpr_time_cmp");
+  gpr_time_max_import = (gpr_time_max_type) GetProcAddress(library, "gpr_time_max");
+  gpr_time_min_import = (gpr_time_min_type) GetProcAddress(library, "gpr_time_min");
+  gpr_time_add_import = (gpr_time_add_type) GetProcAddress(library, "gpr_time_add");
+  gpr_time_sub_import = (gpr_time_sub_type) GetProcAddress(library, "gpr_time_sub");
+  gpr_time_from_micros_import = (gpr_time_from_micros_type) GetProcAddress(library, "gpr_time_from_micros");
+  gpr_time_from_nanos_import = (gpr_time_from_nanos_type) GetProcAddress(library, "gpr_time_from_nanos");
+  gpr_time_from_millis_import = (gpr_time_from_millis_type) GetProcAddress(library, "gpr_time_from_millis");
+  gpr_time_from_seconds_import = (gpr_time_from_seconds_type) GetProcAddress(library, "gpr_time_from_seconds");
+  gpr_time_from_minutes_import = (gpr_time_from_minutes_type) GetProcAddress(library, "gpr_time_from_minutes");
+  gpr_time_from_hours_import = (gpr_time_from_hours_type) GetProcAddress(library, "gpr_time_from_hours");
+  gpr_time_to_millis_import = (gpr_time_to_millis_type) GetProcAddress(library, "gpr_time_to_millis");
+  gpr_time_similar_import = (gpr_time_similar_type) GetProcAddress(library, "gpr_time_similar");
+  gpr_sleep_until_import = (gpr_sleep_until_type) GetProcAddress(library, "gpr_sleep_until");
+  gpr_timespec_to_micros_import = (gpr_timespec_to_micros_type) GetProcAddress(library, "gpr_timespec_to_micros");
+  gpr_avl_create_import = (gpr_avl_create_type) GetProcAddress(library, "gpr_avl_create");
+  gpr_avl_ref_import = (gpr_avl_ref_type) GetProcAddress(library, "gpr_avl_ref");
+  gpr_avl_unref_import = (gpr_avl_unref_type) GetProcAddress(library, "gpr_avl_unref");
+  gpr_avl_add_import = (gpr_avl_add_type) GetProcAddress(library, "gpr_avl_add");
+  gpr_avl_remove_import = (gpr_avl_remove_type) GetProcAddress(library, "gpr_avl_remove");
+  gpr_avl_get_import = (gpr_avl_get_type) GetProcAddress(library, "gpr_avl_get");
+  gpr_cmdline_create_import = (gpr_cmdline_create_type) GetProcAddress(library, "gpr_cmdline_create");
+  gpr_cmdline_add_int_import = (gpr_cmdline_add_int_type) GetProcAddress(library, "gpr_cmdline_add_int");
+  gpr_cmdline_add_flag_import = (gpr_cmdline_add_flag_type) GetProcAddress(library, "gpr_cmdline_add_flag");
+  gpr_cmdline_add_string_import = (gpr_cmdline_add_string_type) GetProcAddress(library, "gpr_cmdline_add_string");
+  gpr_cmdline_on_extra_arg_import = (gpr_cmdline_on_extra_arg_type) GetProcAddress(library, "gpr_cmdline_on_extra_arg");
+  gpr_cmdline_set_survive_failure_import = (gpr_cmdline_set_survive_failure_type) GetProcAddress(library, "gpr_cmdline_set_survive_failure");
+  gpr_cmdline_parse_import = (gpr_cmdline_parse_type) GetProcAddress(library, "gpr_cmdline_parse");
+  gpr_cmdline_destroy_import = (gpr_cmdline_destroy_type) GetProcAddress(library, "gpr_cmdline_destroy");
+  gpr_cmdline_usage_string_import = (gpr_cmdline_usage_string_type) GetProcAddress(library, "gpr_cmdline_usage_string");
+  gpr_cpu_num_cores_import = (gpr_cpu_num_cores_type) GetProcAddress(library, "gpr_cpu_num_cores");
+  gpr_cpu_current_cpu_import = (gpr_cpu_current_cpu_type) GetProcAddress(library, "gpr_cpu_current_cpu");
+  gpr_histogram_create_import = (gpr_histogram_create_type) GetProcAddress(library, "gpr_histogram_create");
+  gpr_histogram_destroy_import = (gpr_histogram_destroy_type) GetProcAddress(library, "gpr_histogram_destroy");
+  gpr_histogram_add_import = (gpr_histogram_add_type) GetProcAddress(library, "gpr_histogram_add");
+  gpr_histogram_merge_import = (gpr_histogram_merge_type) GetProcAddress(library, "gpr_histogram_merge");
+  gpr_histogram_percentile_import = (gpr_histogram_percentile_type) GetProcAddress(library, "gpr_histogram_percentile");
+  gpr_histogram_mean_import = (gpr_histogram_mean_type) GetProcAddress(library, "gpr_histogram_mean");
+  gpr_histogram_stddev_import = (gpr_histogram_stddev_type) GetProcAddress(library, "gpr_histogram_stddev");
+  gpr_histogram_variance_import = (gpr_histogram_variance_type) GetProcAddress(library, "gpr_histogram_variance");
+  gpr_histogram_maximum_import = (gpr_histogram_maximum_type) GetProcAddress(library, "gpr_histogram_maximum");
+  gpr_histogram_minimum_import = (gpr_histogram_minimum_type) GetProcAddress(library, "gpr_histogram_minimum");
+  gpr_histogram_count_import = (gpr_histogram_count_type) GetProcAddress(library, "gpr_histogram_count");
+  gpr_histogram_sum_import = (gpr_histogram_sum_type) GetProcAddress(library, "gpr_histogram_sum");
+  gpr_histogram_sum_of_squares_import = (gpr_histogram_sum_of_squares_type) GetProcAddress(library, "gpr_histogram_sum_of_squares");
+  gpr_histogram_get_contents_import = (gpr_histogram_get_contents_type) GetProcAddress(library, "gpr_histogram_get_contents");
+  gpr_histogram_merge_contents_import = (gpr_histogram_merge_contents_type) GetProcAddress(library, "gpr_histogram_merge_contents");
+  gpr_join_host_port_import = (gpr_join_host_port_type) GetProcAddress(library, "gpr_join_host_port");
+  gpr_split_host_port_import = (gpr_split_host_port_type) GetProcAddress(library, "gpr_split_host_port");
+  gpr_format_message_import = (gpr_format_message_type) GetProcAddress(library, "gpr_format_message");
+  gpr_strdup_import = (gpr_strdup_type) GetProcAddress(library, "gpr_strdup");
+  gpr_asprintf_import = (gpr_asprintf_type) GetProcAddress(library, "gpr_asprintf");
+  gpr_subprocess_binary_extension_import = (gpr_subprocess_binary_extension_type) GetProcAddress(library, "gpr_subprocess_binary_extension");
+  gpr_subprocess_create_import = (gpr_subprocess_create_type) GetProcAddress(library, "gpr_subprocess_create");
+  gpr_subprocess_destroy_import = (gpr_subprocess_destroy_type) GetProcAddress(library, "gpr_subprocess_destroy");
+  gpr_subprocess_join_import = (gpr_subprocess_join_type) GetProcAddress(library, "gpr_subprocess_join");
+  gpr_subprocess_interrupt_import = (gpr_subprocess_interrupt_type) GetProcAddress(library, "gpr_subprocess_interrupt");
+  gpr_thd_new_import = (gpr_thd_new_type) GetProcAddress(library, "gpr_thd_new");
+  gpr_thd_options_default_import = (gpr_thd_options_default_type) GetProcAddress(library, "gpr_thd_options_default");
+  gpr_thd_options_set_detached_import = (gpr_thd_options_set_detached_type) GetProcAddress(library, "gpr_thd_options_set_detached");
+  gpr_thd_options_set_joinable_import = (gpr_thd_options_set_joinable_type) GetProcAddress(library, "gpr_thd_options_set_joinable");
+  gpr_thd_options_is_detached_import = (gpr_thd_options_is_detached_type) GetProcAddress(library, "gpr_thd_options_is_detached");
+  gpr_thd_options_is_joinable_import = (gpr_thd_options_is_joinable_type) GetProcAddress(library, "gpr_thd_options_is_joinable");
+  gpr_thd_currentid_import = (gpr_thd_currentid_type) GetProcAddress(library, "gpr_thd_currentid");
+  gpr_thd_join_import = (gpr_thd_join_type) GetProcAddress(library, "gpr_thd_join");
+}
+
+#endif /* GPR_WIN32 */
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
new file mode 100644
index 0000000000..45e9b47574
--- /dev/null
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -0,0 +1,843 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_RB_GRPC_IMPORTS_H_
+#define GRPC_RB_GRPC_IMPORTS_H_
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WIN32
+
+#include <windows.h>
+
+#include <grpc/census.h>
+#include <grpc/compression.h>
+#include <grpc/grpc.h>
+#include <grpc/grpc_security.h>
+#include <grpc/impl/codegen/alloc.h>
+#include <grpc/impl/codegen/byte_buffer.h>
+#include <grpc/impl/codegen/log.h>
+#include <grpc/impl/codegen/slice.h>
+#include <grpc/impl/codegen/slice_buffer.h>
+#include <grpc/impl/codegen/sync.h>
+#include <grpc/impl/codegen/time.h>
+#include <grpc/support/avl.h>
+#include <grpc/support/cmdline.h>
+#include <grpc/support/cpu.h>
+#include <grpc/support/histogram.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log_win32.h>
+#include <grpc/support/string_util.h>
+#include <grpc/support/subprocess.h>
+#include <grpc/support/thd.h>
+
+typedef int(*census_initialize_type)(int features);
+extern census_initialize_type census_initialize_import;
+#define census_initialize census_initialize_import
+typedef void(*census_shutdown_type)(void);
+extern census_shutdown_type census_shutdown_import;
+#define census_shutdown census_shutdown_import
+typedef int(*census_supported_type)(void);
+extern census_supported_type census_supported_import;
+#define census_supported census_supported_import
+typedef int(*census_enabled_type)(void);
+extern census_enabled_type census_enabled_import;
+#define census_enabled census_enabled_import
+typedef census_context *(*census_context_create_type)(const census_context *base, const census_tag *tags, int ntags, census_context_status const **status);
+extern census_context_create_type census_context_create_import;
+#define census_context_create census_context_create_import
+typedef void(*census_context_destroy_type)(census_context *context);
+extern census_context_destroy_type census_context_destroy_import;
+#define census_context_destroy census_context_destroy_import
+typedef const census_context_status *(*census_context_get_status_type)(const census_context *context);
+extern census_context_get_status_type census_context_get_status_import;
+#define census_context_get_status census_context_get_status_import
+typedef void(*census_context_initialize_iterator_type)(const census_context *context, census_context_iterator *iterator);
+extern census_context_initialize_iterator_type census_context_initialize_iterator_import;
+#define census_context_initialize_iterator census_context_initialize_iterator_import
+typedef int(*census_context_next_tag_type)(census_context_iterator *iterator, census_tag *tag);
+extern census_context_next_tag_type census_context_next_tag_import;
+#define census_context_next_tag census_context_next_tag_import
+typedef int(*census_context_get_tag_type)(const census_context *context, const char *key, census_tag *tag);
+extern census_context_get_tag_type census_context_get_tag_import;
+#define census_context_get_tag census_context_get_tag_import
+typedef char *(*census_context_encode_type)(const census_context *context, char *buffer, size_t buf_size, size_t *print_buf_size, size_t *bin_buf_size);
+extern census_context_encode_type census_context_encode_import;
+#define census_context_encode census_context_encode_import
+typedef census_context *(*census_context_decode_type)(const char *buffer, size_t size, const char *bin_buffer, size_t bin_size);
+extern census_context_decode_type census_context_decode_import;
+#define census_context_decode census_context_decode_import
+typedef int(*census_trace_mask_type)(const census_context *context);
+extern census_trace_mask_type census_trace_mask_import;
+#define census_trace_mask census_trace_mask_import
+typedef void(*census_set_trace_mask_type)(int trace_mask);
+extern census_set_trace_mask_type census_set_trace_mask_import;
+#define census_set_trace_mask census_set_trace_mask_import
+typedef census_timestamp(*census_start_rpc_op_timestamp_type)(void);
+extern census_start_rpc_op_timestamp_type census_start_rpc_op_timestamp_import;
+#define census_start_rpc_op_timestamp census_start_rpc_op_timestamp_import
+typedef census_context *(*census_start_client_rpc_op_type)(const census_context *context, int64_t rpc_name_id, const census_rpc_name_info *rpc_name_info, const char *peer, int trace_mask, const census_timestamp *start_time);
+extern census_start_client_rpc_op_type census_start_client_rpc_op_import;
+#define census_start_client_rpc_op census_start_client_rpc_op_import
+typedef void(*census_set_rpc_client_peer_type)(census_context *context, const char *peer);
+extern census_set_rpc_client_peer_type census_set_rpc_client_peer_import;
+#define census_set_rpc_client_peer census_set_rpc_client_peer_import
+typedef census_context *(*census_start_server_rpc_op_type)(const char *buffer, int64_t rpc_name_id, const census_rpc_name_info *rpc_name_info, const char *peer, int trace_mask, census_timestamp *start_time);
+extern census_start_server_rpc_op_type census_start_server_rpc_op_import;
+#define census_start_server_rpc_op census_start_server_rpc_op_import
+typedef census_context *(*census_start_op_type)(census_context *context, const char *family, const char *name, int trace_mask);
+extern census_start_op_type census_start_op_import;
+#define census_start_op census_start_op_import
+typedef void(*census_end_op_type)(census_context *context, int status);
+extern census_end_op_type census_end_op_import;
+#define census_end_op census_end_op_import
+typedef void(*census_trace_print_type)(census_context *context, uint32_t type, const char *buffer, size_t n);
+extern census_trace_print_type census_trace_print_import;
+#define census_trace_print census_trace_print_import
+typedef int(*census_trace_scan_start_type)(int consume);
+extern census_trace_scan_start_type census_trace_scan_start_import;
+#define census_trace_scan_start census_trace_scan_start_import
+typedef int(*census_get_trace_record_type)(census_trace_record *trace_record);
+extern census_get_trace_record_type census_get_trace_record_import;
+#define census_get_trace_record census_get_trace_record_import
+typedef void(*census_trace_scan_end_type)();
+extern census_trace_scan_end_type census_trace_scan_end_import;
+#define census_trace_scan_end census_trace_scan_end_import
+typedef void(*census_record_values_type)(census_context *context, census_value *values, size_t nvalues);
+extern census_record_values_type census_record_values_import;
+#define census_record_values census_record_values_import
+typedef census_view *(*census_view_create_type)(uint32_t metric_id, const census_context *tags, const census_aggregation *aggregations, size_t naggregations);
+extern census_view_create_type census_view_create_import;
+#define census_view_create census_view_create_import
+typedef void(*census_view_delete_type)(census_view *view);
+extern census_view_delete_type census_view_delete_import;
+#define census_view_delete census_view_delete_import
+typedef size_t(*census_view_metric_type)(const census_view *view);
+extern census_view_metric_type census_view_metric_import;
+#define census_view_metric census_view_metric_import
+typedef size_t(*census_view_naggregations_type)(const census_view *view);
+extern census_view_naggregations_type census_view_naggregations_import;
+#define census_view_naggregations census_view_naggregations_import
+typedef const census_context *(*census_view_tags_type)(const census_view *view);
+extern census_view_tags_type census_view_tags_import;
+#define census_view_tags census_view_tags_import
+typedef const census_aggregation *(*census_view_aggregrations_type)(const census_view *view);
+extern census_view_aggregrations_type census_view_aggregrations_import;
+#define census_view_aggregrations census_view_aggregrations_import
+typedef const census_view_data *(*census_view_get_data_type)(const census_view *view);
+extern census_view_get_data_type census_view_get_data_import;
+#define census_view_get_data census_view_get_data_import
+typedef void(*census_view_reset_type)(census_view *view);
+extern census_view_reset_type census_view_reset_import;
+#define census_view_reset census_view_reset_import
+typedef int(*grpc_compression_algorithm_parse_type)(const char *name, size_t name_length, grpc_compression_algorithm *algorithm);
+extern grpc_compression_algorithm_parse_type grpc_compression_algorithm_parse_import;
+#define grpc_compression_algorithm_parse grpc_compression_algorithm_parse_import
+typedef int(*grpc_compression_algorithm_name_type)(grpc_compression_algorithm algorithm, char **name);
+extern grpc_compression_algorithm_name_type grpc_compression_algorithm_name_import;
+#define grpc_compression_algorithm_name grpc_compression_algorithm_name_import
+typedef grpc_compression_algorithm(*grpc_compression_algorithm_for_level_type)(grpc_compression_level level);
+extern grpc_compression_algorithm_for_level_type grpc_compression_algorithm_for_level_import;
+#define grpc_compression_algorithm_for_level grpc_compression_algorithm_for_level_import
+typedef void(*grpc_compression_options_init_type)(grpc_compression_options *opts);
+extern grpc_compression_options_init_type grpc_compression_options_init_import;
+#define grpc_compression_options_init grpc_compression_options_init_import
+typedef void(*grpc_compression_options_enable_algorithm_type)(grpc_compression_options *opts, grpc_compression_algorithm algorithm);
+extern grpc_compression_options_enable_algorithm_type grpc_compression_options_enable_algorithm_import;
+#define grpc_compression_options_enable_algorithm grpc_compression_options_enable_algorithm_import
+typedef void(*grpc_compression_options_disable_algorithm_type)(grpc_compression_options *opts, grpc_compression_algorithm algorithm);
+extern grpc_compression_options_disable_algorithm_type grpc_compression_options_disable_algorithm_import;
+#define grpc_compression_options_disable_algorithm grpc_compression_options_disable_algorithm_import
+typedef int(*grpc_compression_options_is_algorithm_enabled_type)(const grpc_compression_options *opts, grpc_compression_algorithm algorithm);
+extern grpc_compression_options_is_algorithm_enabled_type grpc_compression_options_is_algorithm_enabled_import;
+#define grpc_compression_options_is_algorithm_enabled grpc_compression_options_is_algorithm_enabled_import
+typedef void(*grpc_metadata_array_init_type)(grpc_metadata_array *array);
+extern grpc_metadata_array_init_type grpc_metadata_array_init_import;
+#define grpc_metadata_array_init grpc_metadata_array_init_import
+typedef void(*grpc_metadata_array_destroy_type)(grpc_metadata_array *array);
+extern grpc_metadata_array_destroy_type grpc_metadata_array_destroy_import;
+#define grpc_metadata_array_destroy grpc_metadata_array_destroy_import
+typedef void(*grpc_call_details_init_type)(grpc_call_details *details);
+extern grpc_call_details_init_type grpc_call_details_init_import;
+#define grpc_call_details_init grpc_call_details_init_import
+typedef void(*grpc_call_details_destroy_type)(grpc_call_details *details);
+extern grpc_call_details_destroy_type grpc_call_details_destroy_import;
+#define grpc_call_details_destroy grpc_call_details_destroy_import
+typedef void(*grpc_register_plugin_type)(void (*init)(void), void (*destroy)(void));
+extern grpc_register_plugin_type grpc_register_plugin_import;
+#define grpc_register_plugin grpc_register_plugin_import
+typedef void(*grpc_init_type)(void);
+extern grpc_init_type grpc_init_import;
+#define grpc_init grpc_init_import
+typedef void(*grpc_shutdown_type)(void);
+extern grpc_shutdown_type grpc_shutdown_import;
+#define grpc_shutdown grpc_shutdown_import
+typedef const char *(*grpc_version_string_type)(void);
+extern grpc_version_string_type grpc_version_string_import;
+#define grpc_version_string grpc_version_string_import
+typedef grpc_completion_queue *(*grpc_completion_queue_create_type)(void *reserved);
+extern grpc_completion_queue_create_type grpc_completion_queue_create_import;
+#define grpc_completion_queue_create grpc_completion_queue_create_import
+typedef grpc_event(*grpc_completion_queue_next_type)(grpc_completion_queue *cq, gpr_timespec deadline, void *reserved);
+extern grpc_completion_queue_next_type grpc_completion_queue_next_import;
+#define grpc_completion_queue_next grpc_completion_queue_next_import
+typedef grpc_event(*grpc_completion_queue_pluck_type)(grpc_completion_queue *cq, void *tag, gpr_timespec deadline, void *reserved);
+extern grpc_completion_queue_pluck_type grpc_completion_queue_pluck_import;
+#define grpc_completion_queue_pluck grpc_completion_queue_pluck_import
+typedef void(*grpc_completion_queue_shutdown_type)(grpc_completion_queue *cq);
+extern grpc_completion_queue_shutdown_type grpc_completion_queue_shutdown_import;
+#define grpc_completion_queue_shutdown grpc_completion_queue_shutdown_import
+typedef void(*grpc_completion_queue_destroy_type)(grpc_completion_queue *cq);
+extern grpc_completion_queue_destroy_type grpc_completion_queue_destroy_import;
+#define grpc_completion_queue_destroy grpc_completion_queue_destroy_import
+typedef grpc_alarm *(*grpc_alarm_create_type)(grpc_completion_queue *cq, gpr_timespec deadline, void *tag);
+extern grpc_alarm_create_type grpc_alarm_create_import;
+#define grpc_alarm_create grpc_alarm_create_import
+typedef void(*grpc_alarm_cancel_type)(grpc_alarm *alarm);
+extern grpc_alarm_cancel_type grpc_alarm_cancel_import;
+#define grpc_alarm_cancel grpc_alarm_cancel_import
+typedef void(*grpc_alarm_destroy_type)(grpc_alarm *alarm);
+extern grpc_alarm_destroy_type grpc_alarm_destroy_import;
+#define grpc_alarm_destroy grpc_alarm_destroy_import
+typedef grpc_connectivity_state(*grpc_channel_check_connectivity_state_type)(grpc_channel *channel, int try_to_connect);
+extern grpc_channel_check_connectivity_state_type grpc_channel_check_connectivity_state_import;
+#define grpc_channel_check_connectivity_state grpc_channel_check_connectivity_state_import
+typedef void(*grpc_channel_watch_connectivity_state_type)(grpc_channel *channel, grpc_connectivity_state last_observed_state, gpr_timespec deadline, grpc_completion_queue *cq, void *tag);
+extern grpc_channel_watch_connectivity_state_type grpc_channel_watch_connectivity_state_import;
+#define grpc_channel_watch_connectivity_state grpc_channel_watch_connectivity_state_import
+typedef grpc_call *(*grpc_channel_create_call_type)(grpc_channel *channel, grpc_call *parent_call, uint32_t propagation_mask, grpc_completion_queue *completion_queue, const char *method, const char *host, gpr_timespec deadline, void *reserved);
+extern grpc_channel_create_call_type grpc_channel_create_call_import;
+#define grpc_channel_create_call grpc_channel_create_call_import
+typedef void(*grpc_channel_ping_type)(grpc_channel *channel, grpc_completion_queue *cq, void *tag, void *reserved);
+extern grpc_channel_ping_type grpc_channel_ping_import;
+#define grpc_channel_ping grpc_channel_ping_import
+typedef void *(*grpc_channel_register_call_type)(grpc_channel *channel, const char *method, const char *host, void *reserved);
+extern grpc_channel_register_call_type grpc_channel_register_call_import;
+#define grpc_channel_register_call grpc_channel_register_call_import
+typedef grpc_call *(*grpc_channel_create_registered_call_type)(grpc_channel *channel, grpc_call *parent_call, uint32_t propagation_mask, grpc_completion_queue *completion_queue, void *registered_call_handle, gpr_timespec deadline, void *reserved);
+extern grpc_channel_create_registered_call_type grpc_channel_create_registered_call_import;
+#define grpc_channel_create_registered_call grpc_channel_create_registered_call_import
+typedef grpc_call_error(*grpc_call_start_batch_type)(grpc_call *call, const grpc_op *ops, size_t nops, void *tag, void *reserved);
+extern grpc_call_start_batch_type grpc_call_start_batch_import;
+#define grpc_call_start_batch grpc_call_start_batch_import
+typedef char *(*grpc_call_get_peer_type)(grpc_call *call);
+extern grpc_call_get_peer_type grpc_call_get_peer_import;
+#define grpc_call_get_peer grpc_call_get_peer_import
+typedef void(*grpc_census_call_set_context_type)(grpc_call *call, struct census_context *context);
+extern grpc_census_call_set_context_type grpc_census_call_set_context_import;
+#define grpc_census_call_set_context grpc_census_call_set_context_import
+typedef struct census_context *(*grpc_census_call_get_context_type)(grpc_call *call);
+extern grpc_census_call_get_context_type grpc_census_call_get_context_import;
+#define grpc_census_call_get_context grpc_census_call_get_context_import
+typedef char *(*grpc_channel_get_target_type)(grpc_channel *channel);
+extern grpc_channel_get_target_type grpc_channel_get_target_import;
+#define grpc_channel_get_target grpc_channel_get_target_import
+typedef grpc_channel *(*grpc_insecure_channel_create_type)(const char *target, const grpc_channel_args *args, void *reserved);
+extern grpc_insecure_channel_create_type grpc_insecure_channel_create_import;
+#define grpc_insecure_channel_create grpc_insecure_channel_create_import
+typedef grpc_channel *(*grpc_lame_client_channel_create_type)(const char *target, grpc_status_code error_code, const char *error_message);
+extern grpc_lame_client_channel_create_type grpc_lame_client_channel_create_import;
+#define grpc_lame_client_channel_create grpc_lame_client_channel_create_import
+typedef void(*grpc_channel_destroy_type)(grpc_channel *channel);
+extern grpc_channel_destroy_type grpc_channel_destroy_import;
+#define grpc_channel_destroy grpc_channel_destroy_import
+typedef grpc_call_error(*grpc_call_cancel_type)(grpc_call *call, void *reserved);
+extern grpc_call_cancel_type grpc_call_cancel_import;
+#define grpc_call_cancel grpc_call_cancel_import
+typedef grpc_call_error(*grpc_call_cancel_with_status_type)(grpc_call *call, grpc_status_code status, const char *description, void *reserved);
+extern grpc_call_cancel_with_status_type grpc_call_cancel_with_status_import;
+#define grpc_call_cancel_with_status grpc_call_cancel_with_status_import
+typedef void(*grpc_call_destroy_type)(grpc_call *call);
+extern grpc_call_destroy_type grpc_call_destroy_import;
+#define grpc_call_destroy grpc_call_destroy_import
+typedef grpc_call_error(*grpc_server_request_call_type)(grpc_server *server, grpc_call **call, grpc_call_details *details, grpc_metadata_array *request_metadata, grpc_completion_queue *cq_bound_to_call, grpc_completion_queue *cq_for_notification, void *tag_new);
+extern grpc_server_request_call_type grpc_server_request_call_import;
+#define grpc_server_request_call grpc_server_request_call_import
+typedef void *(*grpc_server_register_method_type)(grpc_server *server, const char *method, const char *host);
+extern grpc_server_register_method_type grpc_server_register_method_import;
+#define grpc_server_register_method grpc_server_register_method_import
+typedef grpc_call_error(*grpc_server_request_registered_call_type)(grpc_server *server, void *registered_method, grpc_call **call, gpr_timespec *deadline, grpc_metadata_array *request_metadata, grpc_byte_buffer **optional_payload, grpc_completion_queue *cq_bound_to_call, grpc_completion_queue *cq_for_notification, void *tag_new);
+extern grpc_server_request_registered_call_type grpc_server_request_registered_call_import;
+#define grpc_server_request_registered_call grpc_server_request_registered_call_import
+typedef grpc_server *(*grpc_server_create_type)(const grpc_channel_args *args, void *reserved);
+extern grpc_server_create_type grpc_server_create_import;
+#define grpc_server_create grpc_server_create_import
+typedef void(*grpc_server_register_completion_queue_type)(grpc_server *server, grpc_completion_queue *cq, void *reserved);
+extern grpc_server_register_completion_queue_type grpc_server_register_completion_queue_import;
+#define grpc_server_register_completion_queue grpc_server_register_completion_queue_import
+typedef int(*grpc_server_add_insecure_http2_port_type)(grpc_server *server, const char *addr);
+extern grpc_server_add_insecure_http2_port_type grpc_server_add_insecure_http2_port_import;
+#define grpc_server_add_insecure_http2_port grpc_server_add_insecure_http2_port_import
+typedef void(*grpc_server_start_type)(grpc_server *server);
+extern grpc_server_start_type grpc_server_start_import;
+#define grpc_server_start grpc_server_start_import
+typedef void(*grpc_server_shutdown_and_notify_type)(grpc_server *server, grpc_completion_queue *cq, void *tag);
+extern grpc_server_shutdown_and_notify_type grpc_server_shutdown_and_notify_import;
+#define grpc_server_shutdown_and_notify grpc_server_shutdown_and_notify_import
+typedef void(*grpc_server_cancel_all_calls_type)(grpc_server *server);
+extern grpc_server_cancel_all_calls_type grpc_server_cancel_all_calls_import;
+#define grpc_server_cancel_all_calls grpc_server_cancel_all_calls_import
+typedef void(*grpc_server_destroy_type)(grpc_server *server);
+extern grpc_server_destroy_type grpc_server_destroy_import;
+#define grpc_server_destroy grpc_server_destroy_import
+typedef int(*grpc_tracer_set_enabled_type)(const char *name, int enabled);
+extern grpc_tracer_set_enabled_type grpc_tracer_set_enabled_import;
+#define grpc_tracer_set_enabled grpc_tracer_set_enabled_import
+typedef int(*grpc_header_key_is_legal_type)(const char *key, size_t length);
+extern grpc_header_key_is_legal_type grpc_header_key_is_legal_import;
+#define grpc_header_key_is_legal grpc_header_key_is_legal_import
+typedef int(*grpc_header_nonbin_value_is_legal_type)(const char *value, size_t length);
+extern grpc_header_nonbin_value_is_legal_type grpc_header_nonbin_value_is_legal_import;
+#define grpc_header_nonbin_value_is_legal grpc_header_nonbin_value_is_legal_import
+typedef int(*grpc_is_binary_header_type)(const char *key, size_t length);
+extern grpc_is_binary_header_type grpc_is_binary_header_import;
+#define grpc_is_binary_header grpc_is_binary_header_import
+typedef const grpc_auth_property *(*grpc_auth_property_iterator_next_type)(grpc_auth_property_iterator *it);
+extern grpc_auth_property_iterator_next_type grpc_auth_property_iterator_next_import;
+#define grpc_auth_property_iterator_next grpc_auth_property_iterator_next_import
+typedef grpc_auth_property_iterator(*grpc_auth_context_property_iterator_type)(const grpc_auth_context *ctx);
+extern grpc_auth_context_property_iterator_type grpc_auth_context_property_iterator_import;
+#define grpc_auth_context_property_iterator grpc_auth_context_property_iterator_import
+typedef grpc_auth_property_iterator(*grpc_auth_context_peer_identity_type)(const grpc_auth_context *ctx);
+extern grpc_auth_context_peer_identity_type grpc_auth_context_peer_identity_import;
+#define grpc_auth_context_peer_identity grpc_auth_context_peer_identity_import
+typedef grpc_auth_property_iterator(*grpc_auth_context_find_properties_by_name_type)(const grpc_auth_context *ctx, const char *name);
+extern grpc_auth_context_find_properties_by_name_type grpc_auth_context_find_properties_by_name_import;
+#define grpc_auth_context_find_properties_by_name grpc_auth_context_find_properties_by_name_import
+typedef const char *(*grpc_auth_context_peer_identity_property_name_type)(const grpc_auth_context *ctx);
+extern grpc_auth_context_peer_identity_property_name_type grpc_auth_context_peer_identity_property_name_import;
+#define grpc_auth_context_peer_identity_property_name grpc_auth_context_peer_identity_property_name_import
+typedef int(*grpc_auth_context_peer_is_authenticated_type)(const grpc_auth_context *ctx);
+extern grpc_auth_context_peer_is_authenticated_type grpc_auth_context_peer_is_authenticated_import;
+#define grpc_auth_context_peer_is_authenticated grpc_auth_context_peer_is_authenticated_import
+typedef grpc_auth_context *(*grpc_call_auth_context_type)(grpc_call *call);
+extern grpc_call_auth_context_type grpc_call_auth_context_import;
+#define grpc_call_auth_context grpc_call_auth_context_import
+typedef void(*grpc_auth_context_release_type)(grpc_auth_context *context);
+extern grpc_auth_context_release_type grpc_auth_context_release_import;
+#define grpc_auth_context_release grpc_auth_context_release_import
+typedef void(*grpc_auth_context_add_property_type)(grpc_auth_context *ctx, const char *name, const char *value, size_t value_length);
+extern grpc_auth_context_add_property_type grpc_auth_context_add_property_import;
+#define grpc_auth_context_add_property grpc_auth_context_add_property_import
+typedef void(*grpc_auth_context_add_cstring_property_type)(grpc_auth_context *ctx, const char *name, const char *value);
+extern grpc_auth_context_add_cstring_property_type grpc_auth_context_add_cstring_property_import;
+#define grpc_auth_context_add_cstring_property grpc_auth_context_add_cstring_property_import
+typedef int(*grpc_auth_context_set_peer_identity_property_name_type)(grpc_auth_context *ctx, const char *name);
+extern grpc_auth_context_set_peer_identity_property_name_type grpc_auth_context_set_peer_identity_property_name_import;
+#define grpc_auth_context_set_peer_identity_property_name grpc_auth_context_set_peer_identity_property_name_import
+typedef void(*grpc_channel_credentials_release_type)(grpc_channel_credentials *creds);
+extern grpc_channel_credentials_release_type grpc_channel_credentials_release_import;
+#define grpc_channel_credentials_release grpc_channel_credentials_release_import
+typedef grpc_channel_credentials *(*grpc_google_default_credentials_create_type)(void);
+extern grpc_google_default_credentials_create_type grpc_google_default_credentials_create_import;
+#define grpc_google_default_credentials_create grpc_google_default_credentials_create_import
+typedef grpc_channel_credentials *(*grpc_ssl_credentials_create_type)(const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pair, void *reserved);
+extern grpc_ssl_credentials_create_type grpc_ssl_credentials_create_import;
+#define grpc_ssl_credentials_create grpc_ssl_credentials_create_import
+typedef void(*grpc_call_credentials_release_type)(grpc_call_credentials *creds);
+extern grpc_call_credentials_release_type grpc_call_credentials_release_import;
+#define grpc_call_credentials_release grpc_call_credentials_release_import
+typedef grpc_channel_credentials *(*grpc_composite_channel_credentials_create_type)(grpc_channel_credentials *channel_creds, grpc_call_credentials *call_creds, void *reserved);
+extern grpc_composite_channel_credentials_create_type grpc_composite_channel_credentials_create_import;
+#define grpc_composite_channel_credentials_create grpc_composite_channel_credentials_create_import
+typedef grpc_call_credentials *(*grpc_composite_call_credentials_create_type)(grpc_call_credentials *creds1, grpc_call_credentials *creds2, void *reserved);
+extern grpc_composite_call_credentials_create_type grpc_composite_call_credentials_create_import;
+#define grpc_composite_call_credentials_create grpc_composite_call_credentials_create_import
+typedef grpc_call_credentials *(*grpc_google_compute_engine_credentials_create_type)(void *reserved);
+extern grpc_google_compute_engine_credentials_create_type grpc_google_compute_engine_credentials_create_import;
+#define grpc_google_compute_engine_credentials_create grpc_google_compute_engine_credentials_create_import
+typedef gpr_timespec(*grpc_max_auth_token_lifetime_type)();
+extern grpc_max_auth_token_lifetime_type grpc_max_auth_token_lifetime_import;
+#define grpc_max_auth_token_lifetime grpc_max_auth_token_lifetime_import
+typedef grpc_call_credentials *(*grpc_service_account_jwt_access_credentials_create_type)(const char *json_key, gpr_timespec token_lifetime, void *reserved);
+extern grpc_service_account_jwt_access_credentials_create_type grpc_service_account_jwt_access_credentials_create_import;
+#define grpc_service_account_jwt_access_credentials_create grpc_service_account_jwt_access_credentials_create_import
+typedef grpc_call_credentials *(*grpc_google_refresh_token_credentials_create_type)(const char *json_refresh_token, void *reserved);
+extern grpc_google_refresh_token_credentials_create_type grpc_google_refresh_token_credentials_create_import;
+#define grpc_google_refresh_token_credentials_create grpc_google_refresh_token_credentials_create_import
+typedef grpc_call_credentials *(*grpc_access_token_credentials_create_type)(const char *access_token, void *reserved);
+extern grpc_access_token_credentials_create_type grpc_access_token_credentials_create_import;
+#define grpc_access_token_credentials_create grpc_access_token_credentials_create_import
+typedef grpc_call_credentials *(*grpc_google_iam_credentials_create_type)(const char *authorization_token, const char *authority_selector, void *reserved);
+extern grpc_google_iam_credentials_create_type grpc_google_iam_credentials_create_import;
+#define grpc_google_iam_credentials_create grpc_google_iam_credentials_create_import
+typedef grpc_call_credentials *(*grpc_metadata_credentials_create_from_plugin_type)(grpc_metadata_credentials_plugin plugin, void *reserved);
+extern grpc_metadata_credentials_create_from_plugin_type grpc_metadata_credentials_create_from_plugin_import;
+#define grpc_metadata_credentials_create_from_plugin grpc_metadata_credentials_create_from_plugin_import
+typedef grpc_channel *(*grpc_secure_channel_create_type)(grpc_channel_credentials *creds, const char *target, const grpc_channel_args *args, void *reserved);
+extern grpc_secure_channel_create_type grpc_secure_channel_create_import;
+#define grpc_secure_channel_create grpc_secure_channel_create_import
+typedef void(*grpc_server_credentials_release_type)(grpc_server_credentials *creds);
+extern grpc_server_credentials_release_type grpc_server_credentials_release_import;
+#define grpc_server_credentials_release grpc_server_credentials_release_import
+typedef grpc_server_credentials *(*grpc_ssl_server_credentials_create_type)(const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pairs, size_t num_key_cert_pairs, int force_client_auth, void *reserved);
+extern grpc_ssl_server_credentials_create_type grpc_ssl_server_credentials_create_import;
+#define grpc_ssl_server_credentials_create grpc_ssl_server_credentials_create_import
+typedef int(*grpc_server_add_secure_http2_port_type)(grpc_server *server, const char *addr, grpc_server_credentials *creds);
+extern grpc_server_add_secure_http2_port_type grpc_server_add_secure_http2_port_import;
+#define grpc_server_add_secure_http2_port grpc_server_add_secure_http2_port_import
+typedef grpc_call_error(*grpc_call_set_credentials_type)(grpc_call *call, grpc_call_credentials *creds);
+extern grpc_call_set_credentials_type grpc_call_set_credentials_import;
+#define grpc_call_set_credentials grpc_call_set_credentials_import
+typedef void(*grpc_server_credentials_set_auth_metadata_processor_type)(grpc_server_credentials *creds, grpc_auth_metadata_processor processor);
+extern grpc_server_credentials_set_auth_metadata_processor_type grpc_server_credentials_set_auth_metadata_processor_import;
+#define grpc_server_credentials_set_auth_metadata_processor grpc_server_credentials_set_auth_metadata_processor_import
+typedef void *(*gpr_malloc_type)(size_t size);
+extern gpr_malloc_type gpr_malloc_import;
+#define gpr_malloc gpr_malloc_import
+typedef void(*gpr_free_type)(void *ptr);
+extern gpr_free_type gpr_free_import;
+#define gpr_free gpr_free_import
+typedef void *(*gpr_realloc_type)(void *p, size_t size);
+extern gpr_realloc_type gpr_realloc_import;
+#define gpr_realloc gpr_realloc_import
+typedef void *(*gpr_malloc_aligned_type)(size_t size, size_t alignment_log);
+extern gpr_malloc_aligned_type gpr_malloc_aligned_import;
+#define gpr_malloc_aligned gpr_malloc_aligned_import
+typedef void(*gpr_free_aligned_type)(void *ptr);
+extern gpr_free_aligned_type gpr_free_aligned_import;
+#define gpr_free_aligned gpr_free_aligned_import
+typedef void(*gpr_set_allocation_functions_type)(gpr_allocation_functions functions);
+extern gpr_set_allocation_functions_type gpr_set_allocation_functions_import;
+#define gpr_set_allocation_functions gpr_set_allocation_functions_import
+typedef gpr_allocation_functions(*gpr_get_allocation_functions_type)();
+extern gpr_get_allocation_functions_type gpr_get_allocation_functions_import;
+#define gpr_get_allocation_functions gpr_get_allocation_functions_import
+typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_create_type)(gpr_slice *slices, size_t nslices);
+extern grpc_raw_byte_buffer_create_type grpc_raw_byte_buffer_create_import;
+#define grpc_raw_byte_buffer_create grpc_raw_byte_buffer_create_import
+typedef grpc_byte_buffer *(*grpc_raw_compressed_byte_buffer_create_type)(gpr_slice *slices, size_t nslices, grpc_compression_algorithm compression);
+extern grpc_raw_compressed_byte_buffer_create_type grpc_raw_compressed_byte_buffer_create_import;
+#define grpc_raw_compressed_byte_buffer_create grpc_raw_compressed_byte_buffer_create_import
+typedef grpc_byte_buffer *(*grpc_byte_buffer_copy_type)(grpc_byte_buffer *bb);
+extern grpc_byte_buffer_copy_type grpc_byte_buffer_copy_import;
+#define grpc_byte_buffer_copy grpc_byte_buffer_copy_import
+typedef size_t(*grpc_byte_buffer_length_type)(grpc_byte_buffer *bb);
+extern grpc_byte_buffer_length_type grpc_byte_buffer_length_import;
+#define grpc_byte_buffer_length grpc_byte_buffer_length_import
+typedef void(*grpc_byte_buffer_destroy_type)(grpc_byte_buffer *byte_buffer);
+extern grpc_byte_buffer_destroy_type grpc_byte_buffer_destroy_import;
+#define grpc_byte_buffer_destroy grpc_byte_buffer_destroy_import
+typedef void(*grpc_byte_buffer_reader_init_type)(grpc_byte_buffer_reader *reader, grpc_byte_buffer *buffer);
+extern grpc_byte_buffer_reader_init_type grpc_byte_buffer_reader_init_import;
+#define grpc_byte_buffer_reader_init grpc_byte_buffer_reader_init_import
+typedef void(*grpc_byte_buffer_reader_destroy_type)(grpc_byte_buffer_reader *reader);
+extern grpc_byte_buffer_reader_destroy_type grpc_byte_buffer_reader_destroy_import;
+#define grpc_byte_buffer_reader_destroy grpc_byte_buffer_reader_destroy_import
+typedef int(*grpc_byte_buffer_reader_next_type)(grpc_byte_buffer_reader *reader, gpr_slice *slice);
+extern grpc_byte_buffer_reader_next_type grpc_byte_buffer_reader_next_import;
+#define grpc_byte_buffer_reader_next grpc_byte_buffer_reader_next_import
+typedef gpr_slice(*grpc_byte_buffer_reader_readall_type)(grpc_byte_buffer_reader *reader);
+extern grpc_byte_buffer_reader_readall_type grpc_byte_buffer_reader_readall_import;
+#define grpc_byte_buffer_reader_readall grpc_byte_buffer_reader_readall_import
+typedef grpc_byte_buffer *(*grpc_raw_byte_buffer_from_reader_type)(grpc_byte_buffer_reader *reader);
+extern grpc_raw_byte_buffer_from_reader_type grpc_raw_byte_buffer_from_reader_import;
+#define grpc_raw_byte_buffer_from_reader grpc_raw_byte_buffer_from_reader_import
+typedef void(*gpr_log_type)(const char *file, int line, gpr_log_severity severity, const char *format, ...);
+extern gpr_log_type gpr_log_import;
+#define gpr_log gpr_log_import
+typedef void(*gpr_log_message_type)(const char *file, int line, gpr_log_severity severity, const char *message);
+extern gpr_log_message_type gpr_log_message_import;
+#define gpr_log_message gpr_log_message_import
+typedef void(*gpr_set_log_function_type)(gpr_log_func func);
+extern gpr_set_log_function_type gpr_set_log_function_import;
+#define gpr_set_log_function gpr_set_log_function_import
+typedef gpr_slice(*gpr_slice_ref_type)(gpr_slice s);
+extern gpr_slice_ref_type gpr_slice_ref_import;
+#define gpr_slice_ref gpr_slice_ref_import
+typedef void(*gpr_slice_unref_type)(gpr_slice s);
+extern gpr_slice_unref_type gpr_slice_unref_import;
+#define gpr_slice_unref gpr_slice_unref_import
+typedef gpr_slice(*gpr_slice_new_type)(void *p, size_t len, void (*destroy)(void *));
+extern gpr_slice_new_type gpr_slice_new_import;
+#define gpr_slice_new gpr_slice_new_import
+typedef gpr_slice(*gpr_slice_new_with_len_type)(void *p, size_t len, void (*destroy)(void *, size_t));
+extern gpr_slice_new_with_len_type gpr_slice_new_with_len_import;
+#define gpr_slice_new_with_len gpr_slice_new_with_len_import
+typedef gpr_slice(*gpr_slice_malloc_type)(size_t length);
+extern gpr_slice_malloc_type gpr_slice_malloc_import;
+#define gpr_slice_malloc gpr_slice_malloc_import
+typedef gpr_slice(*gpr_slice_from_copied_string_type)(const char *source);
+extern gpr_slice_from_copied_string_type gpr_slice_from_copied_string_import;
+#define gpr_slice_from_copied_string gpr_slice_from_copied_string_import
+typedef gpr_slice(*gpr_slice_from_copied_buffer_type)(const char *source, size_t len);
+extern gpr_slice_from_copied_buffer_type gpr_slice_from_copied_buffer_import;
+#define gpr_slice_from_copied_buffer gpr_slice_from_copied_buffer_import
+typedef gpr_slice(*gpr_slice_from_static_string_type)(const char *source);
+extern gpr_slice_from_static_string_type gpr_slice_from_static_string_import;
+#define gpr_slice_from_static_string gpr_slice_from_static_string_import
+typedef gpr_slice(*gpr_slice_sub_type)(gpr_slice s, size_t begin, size_t end);
+extern gpr_slice_sub_type gpr_slice_sub_import;
+#define gpr_slice_sub gpr_slice_sub_import
+typedef gpr_slice(*gpr_slice_sub_no_ref_type)(gpr_slice s, size_t begin, size_t end);
+extern gpr_slice_sub_no_ref_type gpr_slice_sub_no_ref_import;
+#define gpr_slice_sub_no_ref gpr_slice_sub_no_ref_import
+typedef gpr_slice(*gpr_slice_split_tail_type)(gpr_slice *s, size_t split);
+extern gpr_slice_split_tail_type gpr_slice_split_tail_import;
+#define gpr_slice_split_tail gpr_slice_split_tail_import
+typedef gpr_slice(*gpr_slice_split_head_type)(gpr_slice *s, size_t split);
+extern gpr_slice_split_head_type gpr_slice_split_head_import;
+#define gpr_slice_split_head gpr_slice_split_head_import
+typedef gpr_slice(*gpr_empty_slice_type)(void);
+extern gpr_empty_slice_type gpr_empty_slice_import;
+#define gpr_empty_slice gpr_empty_slice_import
+typedef int(*gpr_slice_cmp_type)(gpr_slice a, gpr_slice b);
+extern gpr_slice_cmp_type gpr_slice_cmp_import;
+#define gpr_slice_cmp gpr_slice_cmp_import
+typedef int(*gpr_slice_str_cmp_type)(gpr_slice a, const char *b);
+extern gpr_slice_str_cmp_type gpr_slice_str_cmp_import;
+#define gpr_slice_str_cmp gpr_slice_str_cmp_import
+typedef void(*gpr_slice_buffer_init_type)(gpr_slice_buffer *sb);
+extern gpr_slice_buffer_init_type gpr_slice_buffer_init_import;
+#define gpr_slice_buffer_init gpr_slice_buffer_init_import
+typedef void(*gpr_slice_buffer_destroy_type)(gpr_slice_buffer *sb);
+extern gpr_slice_buffer_destroy_type gpr_slice_buffer_destroy_import;
+#define gpr_slice_buffer_destroy gpr_slice_buffer_destroy_import
+typedef void(*gpr_slice_buffer_add_type)(gpr_slice_buffer *sb, gpr_slice slice);
+extern gpr_slice_buffer_add_type gpr_slice_buffer_add_import;
+#define gpr_slice_buffer_add gpr_slice_buffer_add_import
+typedef size_t(*gpr_slice_buffer_add_indexed_type)(gpr_slice_buffer *sb, gpr_slice slice);
+extern gpr_slice_buffer_add_indexed_type gpr_slice_buffer_add_indexed_import;
+#define gpr_slice_buffer_add_indexed gpr_slice_buffer_add_indexed_import
+typedef void(*gpr_slice_buffer_addn_type)(gpr_slice_buffer *sb, gpr_slice *slices, size_t n);
+extern gpr_slice_buffer_addn_type gpr_slice_buffer_addn_import;
+#define gpr_slice_buffer_addn gpr_slice_buffer_addn_import
+typedef uint8_t *(*gpr_slice_buffer_tiny_add_type)(gpr_slice_buffer *sb, size_t len);
+extern gpr_slice_buffer_tiny_add_type gpr_slice_buffer_tiny_add_import;
+#define gpr_slice_buffer_tiny_add gpr_slice_buffer_tiny_add_import
+typedef void(*gpr_slice_buffer_pop_type)(gpr_slice_buffer *sb);
+extern gpr_slice_buffer_pop_type gpr_slice_buffer_pop_import;
+#define gpr_slice_buffer_pop gpr_slice_buffer_pop_import
+typedef void(*gpr_slice_buffer_reset_and_unref_type)(gpr_slice_buffer *sb);
+extern gpr_slice_buffer_reset_and_unref_type gpr_slice_buffer_reset_and_unref_import;
+#define gpr_slice_buffer_reset_and_unref gpr_slice_buffer_reset_and_unref_import
+typedef void(*gpr_slice_buffer_swap_type)(gpr_slice_buffer *a, gpr_slice_buffer *b);
+extern gpr_slice_buffer_swap_type gpr_slice_buffer_swap_import;
+#define gpr_slice_buffer_swap gpr_slice_buffer_swap_import
+typedef void(*gpr_slice_buffer_move_into_type)(gpr_slice_buffer *src, gpr_slice_buffer *dst);
+extern gpr_slice_buffer_move_into_type gpr_slice_buffer_move_into_import;
+#define gpr_slice_buffer_move_into gpr_slice_buffer_move_into_import
+typedef void(*gpr_slice_buffer_trim_end_type)(gpr_slice_buffer *src, size_t n, gpr_slice_buffer *garbage);
+extern gpr_slice_buffer_trim_end_type gpr_slice_buffer_trim_end_import;
+#define gpr_slice_buffer_trim_end gpr_slice_buffer_trim_end_import
+typedef void(*gpr_slice_buffer_move_first_type)(gpr_slice_buffer *src, size_t n, gpr_slice_buffer *dst);
+extern gpr_slice_buffer_move_first_type gpr_slice_buffer_move_first_import;
+#define gpr_slice_buffer_move_first gpr_slice_buffer_move_first_import
+typedef gpr_slice(*gpr_slice_buffer_take_first_type)(gpr_slice_buffer *src);
+extern gpr_slice_buffer_take_first_type gpr_slice_buffer_take_first_import;
+#define gpr_slice_buffer_take_first gpr_slice_buffer_take_first_import
+typedef void(*gpr_mu_init_type)(gpr_mu *mu);
+extern gpr_mu_init_type gpr_mu_init_import;
+#define gpr_mu_init gpr_mu_init_import
+typedef void(*gpr_mu_destroy_type)(gpr_mu *mu);
+extern gpr_mu_destroy_type gpr_mu_destroy_import;
+#define gpr_mu_destroy gpr_mu_destroy_import
+typedef void(*gpr_mu_lock_type)(gpr_mu *mu);
+extern gpr_mu_lock_type gpr_mu_lock_import;
+#define gpr_mu_lock gpr_mu_lock_import
+typedef void(*gpr_mu_unlock_type)(gpr_mu *mu);
+extern gpr_mu_unlock_type gpr_mu_unlock_import;
+#define gpr_mu_unlock gpr_mu_unlock_import
+typedef int(*gpr_mu_trylock_type)(gpr_mu *mu);
+extern gpr_mu_trylock_type gpr_mu_trylock_import;
+#define gpr_mu_trylock gpr_mu_trylock_import
+typedef void(*gpr_cv_init_type)(gpr_cv *cv);
+extern gpr_cv_init_type gpr_cv_init_import;
+#define gpr_cv_init gpr_cv_init_import
+typedef void(*gpr_cv_destroy_type)(gpr_cv *cv);
+extern gpr_cv_destroy_type gpr_cv_destroy_import;
+#define gpr_cv_destroy gpr_cv_destroy_import
+typedef int(*gpr_cv_wait_type)(gpr_cv *cv, gpr_mu *mu, gpr_timespec abs_deadline);
+extern gpr_cv_wait_type gpr_cv_wait_import;
+#define gpr_cv_wait gpr_cv_wait_import
+typedef void(*gpr_cv_signal_type)(gpr_cv *cv);
+extern gpr_cv_signal_type gpr_cv_signal_import;
+#define gpr_cv_signal gpr_cv_signal_import
+typedef void(*gpr_cv_broadcast_type)(gpr_cv *cv);
+extern gpr_cv_broadcast_type gpr_cv_broadcast_import;
+#define gpr_cv_broadcast gpr_cv_broadcast_import
+typedef void(*gpr_once_init_type)(gpr_once *once, void (*init_routine)(void));
+extern gpr_once_init_type gpr_once_init_import;
+#define gpr_once_init gpr_once_init_import
+typedef void(*gpr_event_init_type)(gpr_event *ev);
+extern gpr_event_init_type gpr_event_init_import;
+#define gpr_event_init gpr_event_init_import
+typedef void(*gpr_event_set_type)(gpr_event *ev, void *value);
+extern gpr_event_set_type gpr_event_set_import;
+#define gpr_event_set gpr_event_set_import
+typedef void *(*gpr_event_get_type)(gpr_event *ev);
+extern gpr_event_get_type gpr_event_get_import;
+#define gpr_event_get gpr_event_get_import
+typedef void *(*gpr_event_wait_type)(gpr_event *ev, gpr_timespec abs_deadline);
+extern gpr_event_wait_type gpr_event_wait_import;
+#define gpr_event_wait gpr_event_wait_import
+typedef void(*gpr_ref_init_type)(gpr_refcount *r, int n);
+extern gpr_ref_init_type gpr_ref_init_import;
+#define gpr_ref_init gpr_ref_init_import
+typedef void(*gpr_ref_type)(gpr_refcount *r);
+extern gpr_ref_type gpr_ref_import;
+#define gpr_ref gpr_ref_import
+typedef void(*gpr_refn_type)(gpr_refcount *r, int n);
+extern gpr_refn_type gpr_refn_import;
+#define gpr_refn gpr_refn_import
+typedef int(*gpr_unref_type)(gpr_refcount *r);
+extern gpr_unref_type gpr_unref_import;
+#define gpr_unref gpr_unref_import
+typedef void(*gpr_stats_init_type)(gpr_stats_counter *c, intptr_t n);
+extern gpr_stats_init_type gpr_stats_init_import;
+#define gpr_stats_init gpr_stats_init_import
+typedef void(*gpr_stats_inc_type)(gpr_stats_counter *c, intptr_t inc);
+extern gpr_stats_inc_type gpr_stats_inc_import;
+#define gpr_stats_inc gpr_stats_inc_import
+typedef intptr_t(*gpr_stats_read_type)(const gpr_stats_counter *c);
+extern gpr_stats_read_type gpr_stats_read_import;
+#define gpr_stats_read gpr_stats_read_import
+typedef gpr_timespec(*gpr_time_0_type)(gpr_clock_type type);
+extern gpr_time_0_type gpr_time_0_import;
+#define gpr_time_0 gpr_time_0_import
+typedef gpr_timespec(*gpr_inf_future_type)(gpr_clock_type type);
+extern gpr_inf_future_type gpr_inf_future_import;
+#define gpr_inf_future gpr_inf_future_import
+typedef gpr_timespec(*gpr_inf_past_type)(gpr_clock_type type);
+extern gpr_inf_past_type gpr_inf_past_import;
+#define gpr_inf_past gpr_inf_past_import
+typedef void(*gpr_time_init_type)(void);
+extern gpr_time_init_type gpr_time_init_import;
+#define gpr_time_init gpr_time_init_import
+typedef gpr_timespec(*gpr_now_type)(gpr_clock_type clock);
+extern gpr_now_type gpr_now_import;
+#define gpr_now gpr_now_import
+typedef gpr_timespec(*gpr_convert_clock_type_type)(gpr_timespec t, gpr_clock_type target_clock);
+extern gpr_convert_clock_type_type gpr_convert_clock_type_import;
+#define gpr_convert_clock_type gpr_convert_clock_type_import
+typedef int(*gpr_time_cmp_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_cmp_type gpr_time_cmp_import;
+#define gpr_time_cmp gpr_time_cmp_import
+typedef gpr_timespec(*gpr_time_max_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_max_type gpr_time_max_import;
+#define gpr_time_max gpr_time_max_import
+typedef gpr_timespec(*gpr_time_min_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_min_type gpr_time_min_import;
+#define gpr_time_min gpr_time_min_import
+typedef gpr_timespec(*gpr_time_add_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_add_type gpr_time_add_import;
+#define gpr_time_add gpr_time_add_import
+typedef gpr_timespec(*gpr_time_sub_type)(gpr_timespec a, gpr_timespec b);
+extern gpr_time_sub_type gpr_time_sub_import;
+#define gpr_time_sub gpr_time_sub_import
+typedef gpr_timespec(*gpr_time_from_micros_type)(long x, gpr_clock_type clock_type);
+extern gpr_time_from_micros_type gpr_time_from_micros_import;
+#define gpr_time_from_micros gpr_time_from_micros_import
+typedef gpr_timespec(*gpr_time_from_nanos_type)(long x, gpr_clock_type clock_type);
+extern gpr_time_from_nanos_type gpr_time_from_nanos_import;
+#define gpr_time_from_nanos gpr_time_from_nanos_import
+typedef gpr_timespec(*gpr_time_from_millis_type)(long x, gpr_clock_type clock_type);
+extern gpr_time_from_millis_type gpr_time_from_millis_import;
+#define gpr_time_from_millis gpr_time_from_millis_import
+typedef gpr_timespec(*gpr_time_from_seconds_type)(long x, gpr_clock_type clock_type);
+extern gpr_time_from_seconds_type gpr_time_from_seconds_import;
+#define gpr_time_from_seconds gpr_time_from_seconds_import
+typedef gpr_timespec(*gpr_time_from_minutes_type)(long x, gpr_clock_type clock_type);
+extern gpr_time_from_minutes_type gpr_time_from_minutes_import;
+#define gpr_time_from_minutes gpr_time_from_minutes_import
+typedef gpr_timespec(*gpr_time_from_hours_type)(long x, gpr_clock_type clock_type);
+extern gpr_time_from_hours_type gpr_time_from_hours_import;
+#define gpr_time_from_hours gpr_time_from_hours_import
+typedef int32_t(*gpr_time_to_millis_type)(gpr_timespec timespec);
+extern gpr_time_to_millis_type gpr_time_to_millis_import;
+#define gpr_time_to_millis gpr_time_to_millis_import
+typedef int(*gpr_time_similar_type)(gpr_timespec a, gpr_timespec b, gpr_timespec threshold);
+extern gpr_time_similar_type gpr_time_similar_import;
+#define gpr_time_similar gpr_time_similar_import
+typedef void(*gpr_sleep_until_type)(gpr_timespec until);
+extern gpr_sleep_until_type gpr_sleep_until_import;
+#define gpr_sleep_until gpr_sleep_until_import
+typedef double(*gpr_timespec_to_micros_type)(gpr_timespec t);
+extern gpr_timespec_to_micros_type gpr_timespec_to_micros_import;
+#define gpr_timespec_to_micros gpr_timespec_to_micros_import
+typedef gpr_avl(*gpr_avl_create_type)(const gpr_avl_vtable *vtable);
+extern gpr_avl_create_type gpr_avl_create_import;
+#define gpr_avl_create gpr_avl_create_import
+typedef gpr_avl(*gpr_avl_ref_type)(gpr_avl avl);
+extern gpr_avl_ref_type gpr_avl_ref_import;
+#define gpr_avl_ref gpr_avl_ref_import
+typedef void(*gpr_avl_unref_type)(gpr_avl avl);
+extern gpr_avl_unref_type gpr_avl_unref_import;
+#define gpr_avl_unref gpr_avl_unref_import
+typedef gpr_avl(*gpr_avl_add_type)(gpr_avl avl, void *key, void *value);
+extern gpr_avl_add_type gpr_avl_add_import;
+#define gpr_avl_add gpr_avl_add_import
+typedef gpr_avl(*gpr_avl_remove_type)(gpr_avl avl, void *key);
+extern gpr_avl_remove_type gpr_avl_remove_import;
+#define gpr_avl_remove gpr_avl_remove_import
+typedef void *(*gpr_avl_get_type)(gpr_avl avl, void *key);
+extern gpr_avl_get_type gpr_avl_get_import;
+#define gpr_avl_get gpr_avl_get_import
+typedef gpr_cmdline *(*gpr_cmdline_create_type)(const char *description);
+extern gpr_cmdline_create_type gpr_cmdline_create_import;
+#define gpr_cmdline_create gpr_cmdline_create_import
+typedef void(*gpr_cmdline_add_int_type)(gpr_cmdline *cl, const char *name, const char *help, int *value);
+extern gpr_cmdline_add_int_type gpr_cmdline_add_int_import;
+#define gpr_cmdline_add_int gpr_cmdline_add_int_import
+typedef void(*gpr_cmdline_add_flag_type)(gpr_cmdline *cl, const char *name, const char *help, int *value);
+extern gpr_cmdline_add_flag_type gpr_cmdline_add_flag_import;
+#define gpr_cmdline_add_flag gpr_cmdline_add_flag_import
+typedef void(*gpr_cmdline_add_string_type)(gpr_cmdline *cl, const char *name, const char *help, char **value);
+extern gpr_cmdline_add_string_type gpr_cmdline_add_string_import;
+#define gpr_cmdline_add_string gpr_cmdline_add_string_import
+typedef void(*gpr_cmdline_on_extra_arg_type)(gpr_cmdline *cl, const char *name, const char *help, void (*on_extra_arg)(void *user_data, const char *arg), void *user_data);
+extern gpr_cmdline_on_extra_arg_type gpr_cmdline_on_extra_arg_import;
+#define gpr_cmdline_on_extra_arg gpr_cmdline_on_extra_arg_import
+typedef void(*gpr_cmdline_set_survive_failure_type)(gpr_cmdline *cl);
+extern gpr_cmdline_set_survive_failure_type gpr_cmdline_set_survive_failure_import;
+#define gpr_cmdline_set_survive_failure gpr_cmdline_set_survive_failure_import
+typedef int(*gpr_cmdline_parse_type)(gpr_cmdline *cl, int argc, char **argv);
+extern gpr_cmdline_parse_type gpr_cmdline_parse_import;
+#define gpr_cmdline_parse gpr_cmdline_parse_import
+typedef void(*gpr_cmdline_destroy_type)(gpr_cmdline *cl);
+extern gpr_cmdline_destroy_type gpr_cmdline_destroy_import;
+#define gpr_cmdline_destroy gpr_cmdline_destroy_import
+typedef char *(*gpr_cmdline_usage_string_type)(gpr_cmdline *cl, const char *argv0);
+extern gpr_cmdline_usage_string_type gpr_cmdline_usage_string_import;
+#define gpr_cmdline_usage_string gpr_cmdline_usage_string_import
+typedef unsigned(*gpr_cpu_num_cores_type)(void);
+extern gpr_cpu_num_cores_type gpr_cpu_num_cores_import;
+#define gpr_cpu_num_cores gpr_cpu_num_cores_import
+typedef unsigned(*gpr_cpu_current_cpu_type)(void);
+extern gpr_cpu_current_cpu_type gpr_cpu_current_cpu_import;
+#define gpr_cpu_current_cpu gpr_cpu_current_cpu_import
+typedef gpr_histogram *(*gpr_histogram_create_type)(double resolution, double max_bucket_start);
+extern gpr_histogram_create_type gpr_histogram_create_import;
+#define gpr_histogram_create gpr_histogram_create_import
+typedef void(*gpr_histogram_destroy_type)(gpr_histogram *h);
+extern gpr_histogram_destroy_type gpr_histogram_destroy_import;
+#define gpr_histogram_destroy gpr_histogram_destroy_import
+typedef void(*gpr_histogram_add_type)(gpr_histogram *h, double x);
+extern gpr_histogram_add_type gpr_histogram_add_import;
+#define gpr_histogram_add gpr_histogram_add_import
+typedef int(*gpr_histogram_merge_type)(gpr_histogram *dst, const gpr_histogram *src);
+extern gpr_histogram_merge_type gpr_histogram_merge_import;
+#define gpr_histogram_merge gpr_histogram_merge_import
+typedef double(*gpr_histogram_percentile_type)(gpr_histogram *histogram, double percentile);
+extern gpr_histogram_percentile_type gpr_histogram_percentile_import;
+#define gpr_histogram_percentile gpr_histogram_percentile_import
+typedef double(*gpr_histogram_mean_type)(gpr_histogram *histogram);
+extern gpr_histogram_mean_type gpr_histogram_mean_import;
+#define gpr_histogram_mean gpr_histogram_mean_import
+typedef double(*gpr_histogram_stddev_type)(gpr_histogram *histogram);
+extern gpr_histogram_stddev_type gpr_histogram_stddev_import;
+#define gpr_histogram_stddev gpr_histogram_stddev_import
+typedef double(*gpr_histogram_variance_type)(gpr_histogram *histogram);
+extern gpr_histogram_variance_type gpr_histogram_variance_import;
+#define gpr_histogram_variance gpr_histogram_variance_import
+typedef double(*gpr_histogram_maximum_type)(gpr_histogram *histogram);
+extern gpr_histogram_maximum_type gpr_histogram_maximum_import;
+#define gpr_histogram_maximum gpr_histogram_maximum_import
+typedef double(*gpr_histogram_minimum_type)(gpr_histogram *histogram);
+extern gpr_histogram_minimum_type gpr_histogram_minimum_import;
+#define gpr_histogram_minimum gpr_histogram_minimum_import
+typedef double(*gpr_histogram_count_type)(gpr_histogram *histogram);
+extern gpr_histogram_count_type gpr_histogram_count_import;
+#define gpr_histogram_count gpr_histogram_count_import
+typedef double(*gpr_histogram_sum_type)(gpr_histogram *histogram);
+extern gpr_histogram_sum_type gpr_histogram_sum_import;
+#define gpr_histogram_sum gpr_histogram_sum_import
+typedef double(*gpr_histogram_sum_of_squares_type)(gpr_histogram *histogram);
+extern gpr_histogram_sum_of_squares_type gpr_histogram_sum_of_squares_import;
+#define gpr_histogram_sum_of_squares gpr_histogram_sum_of_squares_import
+typedef const uint32_t *(*gpr_histogram_get_contents_type)(gpr_histogram *histogram, size_t *count);
+extern gpr_histogram_get_contents_type gpr_histogram_get_contents_import;
+#define gpr_histogram_get_contents gpr_histogram_get_contents_import
+typedef void(*gpr_histogram_merge_contents_type)(gpr_histogram *histogram, const uint32_t *data, size_t data_count, double min_seen, double max_seen, double sum, double sum_of_squares, double count);
+extern gpr_histogram_merge_contents_type gpr_histogram_merge_contents_import;
+#define gpr_histogram_merge_contents gpr_histogram_merge_contents_import
+typedef int(*gpr_join_host_port_type)(char **out, const char *host, int port);
+extern gpr_join_host_port_type gpr_join_host_port_import;
+#define gpr_join_host_port gpr_join_host_port_import
+typedef int(*gpr_split_host_port_type)(const char *name, char **host, char **port);
+extern gpr_split_host_port_type gpr_split_host_port_import;
+#define gpr_split_host_port gpr_split_host_port_import
+typedef char *(*gpr_format_message_type)(int messageid);
+extern gpr_format_message_type gpr_format_message_import;
+#define gpr_format_message gpr_format_message_import
+typedef char *(*gpr_strdup_type)(const char *src);
+extern gpr_strdup_type gpr_strdup_import;
+#define gpr_strdup gpr_strdup_import
+typedef int(*gpr_asprintf_type)(char **strp, const char *format, ...);
+extern gpr_asprintf_type gpr_asprintf_import;
+#define gpr_asprintf gpr_asprintf_import
+typedef const char *(*gpr_subprocess_binary_extension_type)();
+extern gpr_subprocess_binary_extension_type gpr_subprocess_binary_extension_import;
+#define gpr_subprocess_binary_extension gpr_subprocess_binary_extension_import
+typedef gpr_subprocess *(*gpr_subprocess_create_type)(int argc, const char **argv);
+extern gpr_subprocess_create_type gpr_subprocess_create_import;
+#define gpr_subprocess_create gpr_subprocess_create_import
+typedef void(*gpr_subprocess_destroy_type)(gpr_subprocess *p);
+extern gpr_subprocess_destroy_type gpr_subprocess_destroy_import;
+#define gpr_subprocess_destroy gpr_subprocess_destroy_import
+typedef int(*gpr_subprocess_join_type)(gpr_subprocess *p);
+extern gpr_subprocess_join_type gpr_subprocess_join_import;
+#define gpr_subprocess_join gpr_subprocess_join_import
+typedef void(*gpr_subprocess_interrupt_type)(gpr_subprocess *p);
+extern gpr_subprocess_interrupt_type gpr_subprocess_interrupt_import;
+#define gpr_subprocess_interrupt gpr_subprocess_interrupt_import
+typedef int(*gpr_thd_new_type)(gpr_thd_id *t, void (*thd_body)(void *arg), void *arg, const gpr_thd_options *options);
+extern gpr_thd_new_type gpr_thd_new_import;
+#define gpr_thd_new gpr_thd_new_import
+typedef gpr_thd_options(*gpr_thd_options_default_type)(void);
+extern gpr_thd_options_default_type gpr_thd_options_default_import;
+#define gpr_thd_options_default gpr_thd_options_default_import
+typedef void(*gpr_thd_options_set_detached_type)(gpr_thd_options *options);
+extern gpr_thd_options_set_detached_type gpr_thd_options_set_detached_import;
+#define gpr_thd_options_set_detached gpr_thd_options_set_detached_import
+typedef void(*gpr_thd_options_set_joinable_type)(gpr_thd_options *options);
+extern gpr_thd_options_set_joinable_type gpr_thd_options_set_joinable_import;
+#define gpr_thd_options_set_joinable gpr_thd_options_set_joinable_import
+typedef int(*gpr_thd_options_is_detached_type)(const gpr_thd_options *options);
+extern gpr_thd_options_is_detached_type gpr_thd_options_is_detached_import;
+#define gpr_thd_options_is_detached gpr_thd_options_is_detached_import
+typedef int(*gpr_thd_options_is_joinable_type)(const gpr_thd_options *options);
+extern gpr_thd_options_is_joinable_type gpr_thd_options_is_joinable_import;
+#define gpr_thd_options_is_joinable gpr_thd_options_is_joinable_import
+typedef gpr_thd_id(*gpr_thd_currentid_type)(void);
+extern gpr_thd_currentid_type gpr_thd_currentid_import;
+#define gpr_thd_currentid gpr_thd_currentid_import
+typedef void(*gpr_thd_join_type)(gpr_thd_id t);
+extern gpr_thd_join_type gpr_thd_join_import;
+#define gpr_thd_join gpr_thd_join_import
+
+void grpc_rb_load_imports(HMODULE library);
+
+#endif /* GPR_WIN32 */
+
+#endif
diff --git a/src/ruby/ext/grpc/rb_loader.c b/src/ruby/ext/grpc/rb_loader.c
new file mode 100644
index 0000000000..242535f164
--- /dev/null
+++ b/src/ruby/ext/grpc/rb_loader.c
@@ -0,0 +1,72 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "rb_grpc_imports.generated.h"
+
+#if GPR_WIN32
+#include <tchar.h>
+
+int grpc_rb_load_core() {
+#if GPR_ARCH_64
+  TCHAR fname[] = _T("grpc_c.64.ruby");
+#else
+  TCHAR fname[] = _T("grpc_c.32.ruby");
+#endif
+  HMODULE module = GetModuleHandle(_T("grpc_c.so"));
+  TCHAR path[2048 + 32] = _T("");
+  LPTSTR seek_back = NULL;
+  GetModuleFileName(module, path, 2048);
+
+  seek_back = _tcsrchr(path, _T('\\'));
+
+  while (seek_back) {
+    HMODULE grpc_c;
+    _tcscpy(seek_back + 1, fname);
+    grpc_c = LoadLibrary(path);
+    if (grpc_c) {
+      grpc_rb_load_imports(grpc_c);
+      return 1;
+    } else {
+      *seek_back = _T('\0');
+      seek_back = _tcsrchr(path, _T('\\'));
+    }
+  }
+
+  return 0;
+}
+
+#else
+
+int grpc_rb_load_core() { return 1; }
+
+#endif
diff --git a/src/ruby/ext/grpc/rb_loader.h b/src/ruby/ext/grpc/rb_loader.h
new file mode 100644
index 0000000000..d0c1613a64
--- /dev/null
+++ b/src/ruby/ext/grpc/rb_loader.h
@@ -0,0 +1,40 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_RB_LOADER_H_
+#define GRPC_RB_LOADER_H_
+
+/* Attempts to load the core if necessary, and return non-zero upon succes. */
+int grpc_rb_load_core();
+
+#endif /* GRPC_RB_BYTE_BUFFER_H_ */
diff --git a/src/ruby/ext/grpc/rb_server.c b/src/ruby/ext/grpc/rb_server.c
index ebdd7e1a34..37cc55a651 100644
--- a/src/ruby/ext/grpc/rb_server.c
+++ b/src/ruby/ext/grpc/rb_server.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
  *
  */
 
+#include <ruby/ruby.h>
+#include "rb_grpc_imports.generated.h"
 #include "rb_server.h"
 
 #include <ruby/ruby.h>
diff --git a/src/ruby/ext/grpc/rb_server_credentials.c b/src/ruby/ext/grpc/rb_server_credentials.c
index de57585e0b..f866aecd28 100644
--- a/src/ruby/ext/grpc/rb_server_credentials.c
+++ b/src/ruby/ext/grpc/rb_server_credentials.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -31,6 +31,8 @@
  *
  */
 
+#include <ruby/ruby.h>
+#include "rb_grpc_imports.generated.h"
 #include "rb_server_credentials.h"
 
 #include <ruby/ruby.h>
diff --git a/src/ruby/lib/grpc/generic/bidi_call.rb b/src/ruby/lib/grpc/generic/bidi_call.rb
index 6b9b785693..213176bd48 100644
--- a/src/ruby/lib/grpc/generic/bidi_call.rb
+++ b/src/ruby/lib/grpc/generic/bidi_call.rb
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/lib/grpc/generic/rpc_desc.rb b/src/ruby/lib/grpc/generic/rpc_desc.rb
index dd90d8d91d..526b2ba5b6 100644
--- a/src/ruby/lib/grpc/generic/rpc_desc.rb
+++ b/src/ruby/lib/grpc/generic/rpc_desc.rb
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/lib/grpc/generic/rpc_server.rb b/src/ruby/lib/grpc/generic/rpc_server.rb
index 410156ff03..ef2997c991 100644
--- a/src/ruby/lib/grpc/generic/rpc_server.rb
+++ b/src/ruby/lib/grpc/generic/rpc_server.rb
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/src/ruby/lib/grpc/grpc.rb b/src/ruby/lib/grpc/grpc.rb
new file mode 100644
index 0000000000..d8a4947494
--- /dev/null
+++ b/src/ruby/lib/grpc/grpc.rb
@@ -0,0 +1,34 @@
+# Copyright 2015-2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+begin
+  require "grpc/#{RUBY_VERSION.sub(/\.\d$/, '')}/grpc_c"
+rescue LoadError
+  require 'grpc/grpc_c'
+end