Add shim for Python's gRPC core on Windows

8 files changed, 1815 insertions, 19 deletions

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..1295009809 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/grpc.pxi
@@ -31,12 +31,14 @@ 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":
+
+  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 +57,6 @@ 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 +77,6 @@ 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 +97,10 @@ 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 +116,6 @@ 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 +323,6 @@ 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/_windows/grpc.def b/src/python/grpcio/grpc/_cython/_windows/grpc.def
new file mode 100644
index 0000000000..4a1cc75cc9
--- /dev/null
+++ b/src/python/grpcio/grpc/_cython/_windows/grpc.def
@@ -0,0 +1,261 @@
+EXPORTS
+    census_initialize
+    census_shutdown
+    census_supported
+    census_enabled
+    census_context_serialize
+    census_trace_mask
+    census_set_trace_mask
+    census_start_rpc_op_timestamp
+    census_start_client_rpc_op
+    census_set_rpc_client_peer
+    census_start_server_rpc_op
+    census_start_op
+    census_end_op
+    census_trace_print
+    census_trace_scan_start
+    census_get_trace_record
+    census_trace_scan_end
+    census_tag_set_create
+    census_tag_set_destroy
+    census_tag_set_get_create_status
+    census_tag_set_initialize_iterator
+    census_tag_set_next_tag
+    census_tag_set_get_tag_by_key
+    census_tag_set_encode
+    census_tag_set_decode
+    census_context_tag_set
+    census_record_values
+    census_view_create
+    census_view_delete
+    census_view_metric
+    census_view_naggregations
+    census_view_tags
+    census_view_aggregrations
+    census_view_get_data
+    census_view_reset
+    grpc_compression_algorithm_parse
+    grpc_compression_algorithm_name
+    grpc_compression_algorithm_for_level
+    grpc_compression_options_init
+    grpc_compression_options_enable_algorithm
+    grpc_compression_options_disable_algorithm
+    grpc_compression_options_is_algorithm_enabled
+    grpc_metadata_array_init
+    grpc_metadata_array_destroy
+    grpc_call_details_init
+    grpc_call_details_destroy
+    grpc_register_plugin
+    grpc_init
+    grpc_shutdown
+    grpc_version_string
+    grpc_completion_queue_create
+    grpc_completion_queue_next
+    grpc_completion_queue_pluck
+    grpc_completion_queue_shutdown
+    grpc_completion_queue_destroy
+    grpc_alarm_create
+    grpc_alarm_cancel
+    grpc_alarm_destroy
+    grpc_channel_check_connectivity_state
+    grpc_channel_watch_connectivity_state
+    grpc_channel_create_call
+    grpc_channel_ping
+    grpc_channel_register_call
+    grpc_channel_create_registered_call
+    grpc_call_start_batch
+    grpc_call_get_peer
+    grpc_census_call_set_context
+    grpc_census_call_get_context
+    grpc_channel_get_target
+    grpc_insecure_channel_create
+    grpc_lame_client_channel_create
+    grpc_channel_destroy
+    grpc_call_cancel
+    grpc_call_cancel_with_status
+    grpc_call_destroy
+    grpc_server_request_call
+    grpc_server_register_method
+    grpc_server_request_registered_call
+    grpc_server_create
+    grpc_server_register_completion_queue
+    grpc_server_add_insecure_http2_port
+    grpc_server_start
+    grpc_server_shutdown_and_notify
+    grpc_server_cancel_all_calls
+    grpc_server_destroy
+    grpc_tracer_set_enabled
+    grpc_header_key_is_legal
+    grpc_header_nonbin_value_is_legal
+    grpc_is_binary_header
+    grpc_auth_property_iterator_next
+    grpc_auth_context_property_iterator
+    grpc_auth_context_peer_identity
+    grpc_auth_context_find_properties_by_name
+    grpc_auth_context_peer_identity_property_name
+    grpc_auth_context_peer_is_authenticated
+    grpc_call_auth_context
+    grpc_auth_context_release
+    grpc_auth_context_add_property
+    grpc_auth_context_add_cstring_property
+    grpc_auth_context_set_peer_identity_property_name
+    grpc_channel_credentials_release
+    grpc_google_default_credentials_create
+    grpc_ssl_credentials_create
+    grpc_call_credentials_release
+    grpc_composite_channel_credentials_create
+    grpc_composite_call_credentials_create
+    grpc_google_compute_engine_credentials_create
+    grpc_max_auth_token_lifetime
+    grpc_service_account_jwt_access_credentials_create
+    grpc_google_refresh_token_credentials_create
+    grpc_access_token_credentials_create
+    grpc_google_iam_credentials_create
+    grpc_metadata_credentials_create_from_plugin
+    grpc_secure_channel_create
+    grpc_server_credentials_release
+    grpc_ssl_server_credentials_create
+    grpc_server_add_secure_http2_port
+    grpc_call_set_credentials
+    grpc_server_credentials_set_auth_metadata_processor
+    gpr_malloc
+    gpr_free
+    gpr_realloc
+    gpr_malloc_aligned
+    gpr_free_aligned
+    gpr_set_allocation_functions
+    gpr_get_allocation_functions
+    grpc_raw_byte_buffer_create
+    grpc_raw_compressed_byte_buffer_create
+    grpc_byte_buffer_copy
+    grpc_byte_buffer_length
+    grpc_byte_buffer_destroy
+    grpc_byte_buffer_reader_init
+    grpc_byte_buffer_reader_destroy
+    grpc_byte_buffer_reader_next
+    grpc_byte_buffer_reader_readall
+    grpc_raw_byte_buffer_from_reader
+    gpr_log
+    gpr_log_message
+    gpr_set_log_function
+    gpr_slice_ref
+    gpr_slice_unref
+    gpr_slice_new
+    gpr_slice_new_with_len
+    gpr_slice_malloc
+    gpr_slice_from_copied_string
+    gpr_slice_from_copied_buffer
+    gpr_slice_from_static_string
+    gpr_slice_sub
+    gpr_slice_sub_no_ref
+    gpr_slice_split_tail
+    gpr_slice_split_head
+    gpr_empty_slice
+    gpr_slice_cmp
+    gpr_slice_str_cmp
+    gpr_slice_buffer_init
+    gpr_slice_buffer_destroy
+    gpr_slice_buffer_add
+    gpr_slice_buffer_add_indexed
+    gpr_slice_buffer_addn
+    gpr_slice_buffer_tiny_add
+    gpr_slice_buffer_pop
+    gpr_slice_buffer_reset_and_unref
+    gpr_slice_buffer_swap
+    gpr_slice_buffer_move_into
+    gpr_slice_buffer_trim_end
+    gpr_slice_buffer_move_first
+    gpr_slice_buffer_take_first
+    gpr_mu_init
+    gpr_mu_destroy
+    gpr_mu_lock
+    gpr_mu_unlock
+    gpr_mu_trylock
+    gpr_cv_init
+    gpr_cv_destroy
+    gpr_cv_wait
+    gpr_cv_signal
+    gpr_cv_broadcast
+    gpr_once_init
+    gpr_event_init
+    gpr_event_set
+    gpr_event_get
+    gpr_event_wait
+    gpr_ref_init
+    gpr_ref
+    gpr_refn
+    gpr_unref
+    gpr_stats_init
+    gpr_stats_inc
+    gpr_stats_read
+    gpr_time_0
+    gpr_inf_future
+    gpr_inf_past
+    gpr_time_init
+    gpr_now
+    gpr_convert_clock_type
+    gpr_time_cmp
+    gpr_time_max
+    gpr_time_min
+    gpr_time_add
+    gpr_time_sub
+    gpr_time_from_micros
+    gpr_time_from_nanos
+    gpr_time_from_millis
+    gpr_time_from_seconds
+    gpr_time_from_minutes
+    gpr_time_from_hours
+    gpr_time_to_millis
+    gpr_time_similar
+    gpr_sleep_until
+    gpr_timespec_to_micros
+    gpr_avl_create
+    gpr_avl_ref
+    gpr_avl_unref
+    gpr_avl_add
+    gpr_avl_remove
+    gpr_avl_get
+    gpr_cmdline_create
+    gpr_cmdline_add_int
+    gpr_cmdline_add_flag
+    gpr_cmdline_add_string
+    gpr_cmdline_on_extra_arg
+    gpr_cmdline_set_survive_failure
+    gpr_cmdline_parse
+    gpr_cmdline_destroy
+    gpr_cmdline_usage_string
+    gpr_cpu_num_cores
+    gpr_cpu_current_cpu
+    gpr_histogram_create
+    gpr_histogram_destroy
+    gpr_histogram_add
+    gpr_histogram_merge
+    gpr_histogram_percentile
+    gpr_histogram_mean
+    gpr_histogram_stddev
+    gpr_histogram_variance
+    gpr_histogram_maximum
+    gpr_histogram_minimum
+    gpr_histogram_count
+    gpr_histogram_sum
+    gpr_histogram_sum_of_squares
+    gpr_histogram_get_contents
+    gpr_histogram_merge_contents
+    gpr_join_host_port
+    gpr_split_host_port
+    gpr_format_message
+    gpr_strdup
+    gpr_asprintf
+    gpr_subprocess_binary_extension
+    gpr_subprocess_create
+    gpr_subprocess_destroy
+    gpr_subprocess_join
+    gpr_subprocess_interrupt
+    gpr_thd_new
+    gpr_thd_options_default
+    gpr_thd_options_set_detached
+    gpr_thd_options_set_joinable
+    gpr_thd_options_is_detached
+    gpr_thd_options_is_joinable
+    gpr_thd_currentid
+    gpr_thd_join
diff --git a/src/python/grpcio/grpc/_cython/cygrpc.pyx b/src/python/grpcio/grpc/_cython/cygrpc.pyx
index 297c8001c5..f30fb17239 100644
--- a/src/python/grpcio/grpc/_cython/cygrpc.pyx
+++ b/src/python/grpcio/grpc/_cython/cygrpc.pyx
@@ -29,6 +29,9 @@
 
 cimport cpython
 
+import pkg_resources
+import os.path
+
 # 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"
@@ -45,6 +48,10 @@ include "grpc/_cython/_cygrpc/server.pyx.pxi"
 cdef class _ModuleState:
 
   def __cinit__(self):
+    filename = pkg_resources.resource_filename(__name__, '_windows/grpc.def')
+    directory = os.path.dirname(filename)
+    if not pygrpc_load_core(directory):
+      raise ImportError('failed to load core gRPC library')
     grpc_init()
 
   def __dealloc__(self):
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..b818f3491b
--- /dev/null
+++ b/src/python/grpcio/grpc/_cython/imports.generated.c
@@ -0,0 +1,564 @@
+/*
+ *
+ * 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_serialize_type census_context_serialize_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_tag_set_create_type census_tag_set_create_import;
+census_tag_set_destroy_type census_tag_set_destroy_import;
+census_tag_set_get_create_status_type census_tag_set_get_create_status_import;
+census_tag_set_initialize_iterator_type census_tag_set_initialize_iterator_import;
+census_tag_set_next_tag_type census_tag_set_next_tag_import;
+census_tag_set_get_tag_by_key_type census_tag_set_get_tag_by_key_import;
+census_tag_set_encode_type census_tag_set_encode_import;
+census_tag_set_decode_type census_tag_set_decode_import;
+census_context_tag_set_type census_context_tag_set_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_serialize_import = (census_context_serialize_type) GetProcAddress(library, "census_context_serialize");
+  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_tag_set_create_import = (census_tag_set_create_type) GetProcAddress(library, "census_tag_set_create");
+  census_tag_set_destroy_import = (census_tag_set_destroy_type) GetProcAddress(library, "census_tag_set_destroy");
+  census_tag_set_get_create_status_import = (census_tag_set_get_create_status_type) GetProcAddress(library, "census_tag_set_get_create_status");
+  census_tag_set_initialize_iterator_import = (census_tag_set_initialize_iterator_type) GetProcAddress(library, "census_tag_set_initialize_iterator");
+  census_tag_set_next_tag_import = (census_tag_set_next_tag_type) GetProcAddress(library, "census_tag_set_next_tag");
+  census_tag_set_get_tag_by_key_import = (census_tag_set_get_tag_by_key_type) GetProcAddress(library, "census_tag_set_get_tag_by_key");
+  census_tag_set_encode_import = (census_tag_set_encode_type) GetProcAddress(library, "census_tag_set_encode");
+  census_tag_set_decode_import = (census_tag_set_decode_type) GetProcAddress(library, "census_tag_set_decode");
+  census_context_tag_set_import = (census_context_tag_set_type) GetProcAddress(library, "census_context_tag_set");
+  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..2a8a910055
--- /dev/null
+++ b/src/python/grpcio/grpc/_cython/imports.generated.h
@@ -0,0 +1,860 @@
+/*
+ *
+ * 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 size_t(*census_context_serialize_type)(const census_context *context, char *buffer, size_t buf_size);
+extern census_context_serialize_type census_context_serialize_import;
+#define census_context_serialize census_context_serialize_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 census_tag_set *(*census_tag_set_create_type)(const census_tag_set *base, const census_tag *tags, int ntags, census_tag_set_create_status const **status);
+extern census_tag_set_create_type census_tag_set_create_import;
+#define census_tag_set_create census_tag_set_create_import
+typedef void(*census_tag_set_destroy_type)(census_tag_set *tags);
+extern census_tag_set_destroy_type census_tag_set_destroy_import;
+#define census_tag_set_destroy census_tag_set_destroy_import
+typedef const census_tag_set_create_status *(*census_tag_set_get_create_status_type)(const census_tag_set *tags);
+extern census_tag_set_get_create_status_type census_tag_set_get_create_status_import;
+#define census_tag_set_get_create_status census_tag_set_get_create_status_import
+typedef void(*census_tag_set_initialize_iterator_type)(const census_tag_set *tags, census_tag_set_iterator *iterator);
+extern census_tag_set_initialize_iterator_type census_tag_set_initialize_iterator_import;
+#define census_tag_set_initialize_iterator census_tag_set_initialize_iterator_import
+typedef int(*census_tag_set_next_tag_type)(census_tag_set_iterator *iterator, census_tag *tag);
+extern census_tag_set_next_tag_type census_tag_set_next_tag_import;
+#define census_tag_set_next_tag census_tag_set_next_tag_import
+typedef int(*census_tag_set_get_tag_by_key_type)(const census_tag_set *tags, const char *key, census_tag *tag);
+extern census_tag_set_get_tag_by_key_type census_tag_set_get_tag_by_key_import;
+#define census_tag_set_get_tag_by_key census_tag_set_get_tag_by_key_import
+typedef char *(*census_tag_set_encode_type)(const census_tag_set *tags, char *buffer, size_t buf_size, size_t *print_buf_size, size_t *bin_buf_size);
+extern census_tag_set_encode_type census_tag_set_encode_import;
+#define census_tag_set_encode census_tag_set_encode_import
+typedef census_tag_set *(*census_tag_set_decode_type)(const char *buffer, size_t size, const char *bin_buffer, size_t bin_size);
+extern census_tag_set_decode_type census_tag_set_decode_import;
+#define census_tag_set_decode census_tag_set_decode_import
+typedef census_tag_set *(*census_context_tag_set_type)(census_context *context);
+extern census_context_tag_set_type census_context_tag_set_import;
+#define census_context_tag_set census_context_tag_set_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_tag_set *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_tag_set *(*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/python/grpcio/grpc/_cython/loader.c b/src/python/grpcio/grpc/_cython/loader.c
new file mode 100644
index 0000000000..bd86228208
--- /dev/null
+++ b/src/python/grpcio/grpc/_cython/loader.c
@@ -0,0 +1,73 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#if GPR_WIN32
+#include <tchar.h>
+
+int pygrpc_load_core(const char *path) {
+  if (!SetDllDirectoryA(path)) {
+    return 0;
+  }
+#if GPR_ARCH_64
+  TCHAR fname[] = _T("grpc_c.64.python");
+#else
+  TCHAR fname[] = _T("grpc_c.32.python");
+#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) {
+      pygrpc_load_imports(grpc_c);
+      return 1;
+    } else {
+      *seek_back = _T('\0');
+      seek_back = _tcsrchr(path, _T('\\'));
+    }
+  }
+
+  return 0;
+}
+
+#else
+
+int pygrpc_load_core(const 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..c41ba2184d
--- /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(const char *path);
+
+#endif /* GRPC_RB_BYTE_BUFFER_H_ */