Merge branch 'grpclb_resolver_changes2' into service_config

2 files changed, 172 insertions, 171 deletions

diff --git a/src/core/ext/client_config/resolver_result.c b/src/core/ext/client_config/resolver_result.c
index 417dc4caa8..c70c8d3ffa 100644
--- a/src/core/ext/client_config/resolver_result.c
+++ b/src/core/ext/client_config/resolver_result.c
@@ -1,35 +1,33 @@
-/*
- *
- * Copyright 2015, 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.
- *
- */
+//
+// Copyright 2015, 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 "src/core/ext/client_config/resolver_result.h"
 
@@ -40,10 +38,12 @@
 
 #include "src/core/lib/transport/metadata.h"
 
-/* grpc_addresses */
+//
+// grpc_addresses
+//
 
-grpc_addresses *grpc_addresses_create(size_t num_addresses) {
-  grpc_addresses *addresses = gpr_malloc(sizeof(grpc_addresses));
+grpc_addresses* grpc_addresses_create(size_t num_addresses) {
+  grpc_addresses* addresses = gpr_malloc(sizeof(grpc_addresses));
   addresses->num_addresses = num_addresses;
   const size_t addresses_size = sizeof(grpc_address) * num_addresses;
   addresses->addresses = gpr_malloc(addresses_size);
@@ -51,29 +51,31 @@ grpc_addresses *grpc_addresses_create(size_t num_addresses) {
   return addresses;
 }
 
-grpc_addresses *grpc_addresses_copy(grpc_addresses* addresses) {
-  grpc_addresses *new = grpc_addresses_create(addresses->num_addresses);
+grpc_addresses* grpc_addresses_copy(grpc_addresses* addresses) {
+  grpc_addresses* new = grpc_addresses_create(addresses->num_addresses);
   memcpy(new->addresses, addresses->addresses,
          sizeof(grpc_address) * addresses->num_addresses);
   return new;
 }
 
-void grpc_addresses_set_address(grpc_addresses *addresses, size_t index,
-                                void *address, size_t address_len,
+void grpc_addresses_set_address(grpc_addresses* addresses, size_t index,
+                                void* address, size_t address_len,
                                 bool is_balancer) {
   GPR_ASSERT(index < addresses->num_addresses);
-  grpc_address *target = &addresses->addresses[index];
+  grpc_address* target = &addresses->addresses[index];
   memcpy(target->address.addr, address, address_len);
   target->address.len = address_len;
   target->is_balancer = is_balancer;
 }
 
-void grpc_addresses_destroy(grpc_addresses *addresses) {
+void grpc_addresses_destroy(grpc_addresses* addresses) {
   gpr_free(addresses->addresses);
   gpr_free(addresses);
 }
 
-/* grpc_method_config */
+//
+// grpc_method_config
+//
 
 struct grpc_method_config {
   gpr_refcount refs;
@@ -83,10 +85,10 @@ struct grpc_method_config {
   int32_t* max_response_message_bytes;
 };
 
-grpc_method_config *grpc_method_config_create(
-    bool *wait_for_ready, gpr_timespec *timeout,
-    int32_t *max_request_message_bytes, int32_t *max_response_message_bytes) {
-  grpc_method_config *config = gpr_malloc(sizeof(*config));
+grpc_method_config* grpc_method_config_create(
+    bool* wait_for_ready, gpr_timespec* timeout,
+    int32_t* max_request_message_bytes, int32_t* max_response_message_bytes) {
+  grpc_method_config* config = gpr_malloc(sizeof(*config));
   memset(config, 0, sizeof(*config));
   gpr_ref_init(&config->refs, 1);
   if (wait_for_ready != NULL) {
@@ -110,12 +112,12 @@ grpc_method_config *grpc_method_config_create(
   return config;
 }
 
-grpc_method_config *grpc_method_config_ref(grpc_method_config *method_config) {
+grpc_method_config* grpc_method_config_ref(grpc_method_config* method_config) {
   gpr_ref(&method_config->refs);
   return method_config;
 }
 
-void grpc_method_config_unref(grpc_method_config *method_config) {
+void grpc_method_config_unref(grpc_method_config* method_config) {
   if (gpr_unref(&method_config->refs)) {
     gpr_free(method_config->wait_for_ready);
     gpr_free(method_config->timeout);
@@ -125,31 +127,32 @@ void grpc_method_config_unref(grpc_method_config *method_config) {
   }
 }
 
-bool* grpc_method_config_get_wait_for_ready(
-    grpc_method_config *method_config) {
+bool* grpc_method_config_get_wait_for_ready(grpc_method_config* method_config) {
   return method_config->wait_for_ready;
 }
 
 gpr_timespec* grpc_method_config_get_timeout(
-    grpc_method_config *method_config) {
+    grpc_method_config* method_config) {
   return method_config->timeout;
 }
 
 int32_t* grpc_method_config_get_max_request_message_bytes(
-    grpc_method_config *method_config) {
+    grpc_method_config* method_config) {
   return method_config->max_request_message_bytes;
 }
 
 int32_t* grpc_method_config_get_max_response_message_bytes(
-    grpc_method_config *method_config) {
+    grpc_method_config* method_config) {
   return method_config->max_response_message_bytes;
 }
 
-/* method_config_table */
+//
+// method_config_table
+//
 
 typedef struct method_config_table_entry {
-  grpc_mdstr *path;
-  grpc_method_config *method_config;
+  grpc_mdstr* path;
+  grpc_method_config* method_config;
 } method_config_table_entry;
 
 #define METHOD_CONFIG_TABLE_SIZE 128
@@ -163,7 +166,7 @@ static void method_config_table_init(method_config_table* table) {
 
 static void method_config_table_destroy(method_config_table* table) {
   for (size_t i = 0; i < GPR_ARRAY_SIZE(table->entries); ++i) {
-    method_config_table_entry *entry = &table->entries[i];
+    method_config_table_entry* entry = &table->entries[i];
     if (entry->path != NULL) {
       GRPC_MDSTR_UNREF(entry->path);
       grpc_method_config_unref(entry->method_config);
@@ -174,50 +177,51 @@ static void method_config_table_destroy(method_config_table* table) {
 // Helper function for insert and get operations that performs quadratic
 // probing (https://en.wikipedia.org/wiki/Quadratic_probing).
 static size_t method_config_table_find_index(method_config_table* table,
-                                             grpc_mdstr *path,
+                                             grpc_mdstr* path,
                                              bool find_empty) {
   for (size_t i = 0; i < GPR_ARRAY_SIZE(table->entries); ++i) {
     const size_t idx = (path->hash + i * i) % GPR_ARRAY_SIZE(table->entries);
     if (table->entries[idx].path == NULL)
       return find_empty ? idx : GPR_ARRAY_SIZE(table->entries);
-    if (table->entries[idx].path == path)
-      return idx;
+    if (table->entries[idx].path == path) return idx;
   }
   return GPR_ARRAY_SIZE(table->entries) + 1;  // Not found.
 }
 
 static void method_config_table_insert(method_config_table* table,
-                                       grpc_mdstr *path,
-                                       grpc_method_config *config) {
+                                       grpc_mdstr* path,
+                                       grpc_method_config* config) {
   const size_t idx =
       method_config_table_find_index(table, path, true /* find_empty */);
   // This can happen if the table is full.
   GPR_ASSERT(idx != GPR_ARRAY_SIZE(table->entries));
-  method_config_table_entry *entry = &table->entries[idx];
+  method_config_table_entry* entry = &table->entries[idx];
   entry->path = GRPC_MDSTR_REF(path);
   entry->method_config = grpc_method_config_ref(config);
 }
 
-static grpc_method_config *method_config_table_get(method_config_table* table,
-                                                   grpc_mdstr *path) {
+static grpc_method_config* method_config_table_get(method_config_table* table,
+                                                   grpc_mdstr* path) {
   const size_t idx =
       method_config_table_find_index(table, path, false /* find_empty */);
   if (idx == GPR_ARRAY_SIZE(table->entries)) return NULL;  // Not found.
   return table->entries[idx].method_config;
 }
 
-/* grpc_resolver_result */
+//
+// grpc_resolver_result
+//
 
 struct grpc_resolver_result {
   gpr_refcount refs;
-  grpc_addresses *addresses;
-  char *lb_policy_name;
+  grpc_addresses* addresses;
+  char* lb_policy_name;
   method_config_table method_configs;
 };
 
-grpc_resolver_result *grpc_resolver_result_create(grpc_addresses *addresses,
-                                                  const char *lb_policy_name) {
-  grpc_resolver_result *result = gpr_malloc(sizeof(*result));
+grpc_resolver_result* grpc_resolver_result_create(grpc_addresses* addresses,
+                                                  const char* lb_policy_name) {
+  grpc_resolver_result* result = gpr_malloc(sizeof(*result));
   memset(result, 0, sizeof(*result));
   gpr_ref_init(&result->refs, 1);
   result->addresses = addresses;
@@ -226,12 +230,12 @@ grpc_resolver_result *grpc_resolver_result_create(grpc_addresses *addresses,
   return result;
 }
 
-void grpc_resolver_result_ref(grpc_resolver_result *result) {
+void grpc_resolver_result_ref(grpc_resolver_result* result) {
   gpr_ref(&result->refs);
 }
 
-void grpc_resolver_result_unref(grpc_exec_ctx *exec_ctx,
-                                grpc_resolver_result *result) {
+void grpc_resolver_result_unref(grpc_exec_ctx* exec_ctx,
+                                grpc_resolver_result* result) {
   if (gpr_unref(&result->refs)) {
     grpc_addresses_destroy(result->addresses);
     gpr_free(result->lb_policy_name);
@@ -240,26 +244,27 @@ void grpc_resolver_result_unref(grpc_exec_ctx *exec_ctx,
   }
 }
 
-grpc_addresses *grpc_resolver_result_get_addresses(
-    grpc_resolver_result *result) {
+grpc_addresses* grpc_resolver_result_get_addresses(
+    grpc_resolver_result* result) {
   return result->addresses;
 }
 
-const char *grpc_resolver_result_get_lb_policy_name(
-    grpc_resolver_result *result) {
+const char* grpc_resolver_result_get_lb_policy_name(
+    grpc_resolver_result* result) {
   return result->lb_policy_name;
 }
 
-void grpc_resolver_result_add_method_config(
-    grpc_resolver_result *result, grpc_mdstr **paths, size_t num_paths,
-    grpc_method_config *method_config) {
+void grpc_resolver_result_add_method_config(grpc_resolver_result* result,
+                                            grpc_mdstr** paths,
+                                            size_t num_paths,
+                                            grpc_method_config* method_config) {
   for (size_t i = 0; i < num_paths; ++i) {
     method_config_table_insert(&result->method_configs, paths[i],
                                method_config);
   }
 }
 
-grpc_method_config *grpc_resolver_result_get_method_config(
-    grpc_resolver_result *result, grpc_mdstr *path) {
+grpc_method_config* grpc_resolver_result_get_method_config(
+    grpc_resolver_result* result, grpc_mdstr* path) {
   return method_config_table_get(&result->method_configs, path);
 }
diff --git a/src/core/ext/client_config/resolver_result.h b/src/core/ext/client_config/resolver_result.h
index 877c0fb744..8402bb581d 100644
--- a/src/core/ext/client_config/resolver_result.h
+++ b/src/core/ext/client_config/resolver_result.h
@@ -1,35 +1,33 @@
-/*
- *
- * Copyright 2015, 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.
- *
- */
+//
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
 
 #ifndef GRPC_CORE_EXT_CLIENT_CONFIG_RESOLVER_RESULT_H
 #define GRPC_CORE_EXT_CLIENT_CONFIG_RESOLVER_RESULT_H
@@ -39,8 +37,7 @@
 #include "src/core/ext/client_config/lb_policy.h"
 #include "src/core/lib/iomgr/resolve_address.h"
 
-/** Used to represent addresses returned by the resolver. */
-
+/// Used to represent addresses returned by the resolver.
 typedef struct grpc_address {
   grpc_resolved_address address;
   bool is_balancer;
@@ -48,76 +45,75 @@ typedef struct grpc_address {
 
 typedef struct grpc_addresses {
   size_t num_addresses;
-  grpc_address *addresses;
+  grpc_address* addresses;
 } grpc_addresses;
 
-/** Returns a grpc_addresses struct with enough space for
-    \a num_addresses addresses. */
-grpc_addresses *grpc_addresses_create(size_t num_addresses);
+/// Returns a grpc_addresses struct with enough space for
+/// \a num_addresses addresses.
+grpc_addresses* grpc_addresses_create(size_t num_addresses);
 
-grpc_addresses *grpc_addresses_copy(grpc_addresses* addresses);
+grpc_addresses* grpc_addresses_copy(grpc_addresses* addresses);
 
-void grpc_addresses_set_address(grpc_addresses *addresses, size_t index,
-                                void *address, size_t address_len,
+void grpc_addresses_set_address(grpc_addresses* addresses, size_t index,
+                                void* address, size_t address_len,
                                 bool is_balancer);
 
-void grpc_addresses_destroy(grpc_addresses *addresses);
+void grpc_addresses_destroy(grpc_addresses* addresses);
 
-/** Per-method configuration. */
+/// Per-method configuration.
 
 typedef struct grpc_method_config grpc_method_config;
 
-/** Any parameter may be NULL to indicate that the value is unset. */
-grpc_method_config *grpc_method_config_create(
-    bool *wait_for_ready, gpr_timespec *timeout,
-    int32_t *max_request_message_bytes, int32_t *max_response_message_bytes);
+/// Any parameter may be NULL to indicate that the value is unset.
+grpc_method_config* grpc_method_config_create(
+    bool* wait_for_ready, gpr_timespec* timeout,
+    int32_t* max_request_message_bytes, int32_t* max_response_message_bytes);
 
-grpc_method_config *grpc_method_config_ref(grpc_method_config *method_config);
-void grpc_method_config_unref(grpc_method_config *method_config);
+grpc_method_config* grpc_method_config_ref(grpc_method_config* method_config);
+void grpc_method_config_unref(grpc_method_config* method_config);
 
-/** These methods return NULL if the requested field is unset.
-    The caller does NOT take ownership of the result. */
-bool *grpc_method_config_get_wait_for_ready(
-    grpc_method_config *method_config);
-gpr_timespec* grpc_method_config_get_timeout(grpc_method_config *method_config);
+/// These methods return NULL if the requested field is unset.
+/// The caller does NOT take ownership of the result.
+bool* grpc_method_config_get_wait_for_ready(grpc_method_config* method_config);
+gpr_timespec* grpc_method_config_get_timeout(grpc_method_config* method_config);
 int32_t* grpc_method_config_get_max_request_message_bytes(
-    grpc_method_config *method_config);
+    grpc_method_config* method_config);
 int32_t* grpc_method_config_get_max_response_message_bytes(
-    grpc_method_config *method_config);
-
-/** Results reported from a grpc_resolver. */
+    grpc_method_config* method_config);
 
+/// Results reported from a grpc_resolver.
 typedef struct grpc_resolver_result grpc_resolver_result;
 
-/** Takes ownership of \a addresses. */
-grpc_resolver_result *grpc_resolver_result_create(grpc_addresses *addresses,
-                                                  const char *lb_policy_name);
-void grpc_resolver_result_ref(grpc_resolver_result *result);
-void grpc_resolver_result_unref(grpc_exec_ctx *exec_ctx,
-                                grpc_resolver_result *result);
-
-/** Caller does NOT take ownership of result. */
-grpc_addresses *grpc_resolver_result_get_addresses(
-    grpc_resolver_result *result);
-
-/** Caller does NOT take ownership of result. */
-const char *grpc_resolver_result_get_lb_policy_name(
-    grpc_resolver_result *result);
-
-/** Adds a method config.  \a paths indicates the set of path names
-    for which this config applies.  Each name is of one of the following
-    forms:
-      service/method -- specifies exact service and method name
-      service/\*     -- matches all methods for the specified service
-      *              -- matches all methods for all services
-    Takes new references to all elements of \a paths and to \a method_config. */
-void grpc_resolver_result_add_method_config(
-    grpc_resolver_result *result, grpc_mdstr **paths, size_t num_paths,
-    grpc_method_config *method_config);
-
-/** Returns NULL if the method has no config.
-    Caller does NOT take ownership of result. */
-grpc_method_config *grpc_resolver_result_get_method_config(
-    grpc_resolver_result *result, grpc_mdstr *path);
+/// Takes ownership of \a addresses.
+grpc_resolver_result* grpc_resolver_result_create(grpc_addresses* addresses,
+                                                  const char* lb_policy_name);
+void grpc_resolver_result_ref(grpc_resolver_result* result);
+void grpc_resolver_result_unref(grpc_exec_ctx* exec_ctx,
+                                grpc_resolver_result* result);
+
+/// Caller does NOT take ownership of result.
+grpc_addresses* grpc_resolver_result_get_addresses(
+    grpc_resolver_result* result);
+
+/// Caller does NOT take ownership of result.
+const char* grpc_resolver_result_get_lb_policy_name(
+    grpc_resolver_result* result);
+
+/// Adds a method config.  \a paths indicates the set of path names
+/// for which this config applies.  Each name is of one of the following
+/// forms:
+///   service/method -- specifies exact service and method name
+///   service/*      -- matches all methods for the specified service
+///   *              -- matches all methods for all services
+/// Takes new references to all elements of \a paths and to \a method_config.
+void grpc_resolver_result_add_method_config(grpc_resolver_result* result,
+                                            grpc_mdstr** paths,
+                                            size_t num_paths,
+                                            grpc_method_config* method_config);
+
+/// Returns NULL if the method has no config.
+/// Caller does NOT take ownership of result.
+grpc_method_config* grpc_resolver_result_get_method_config(
+    grpc_resolver_result* result, grpc_mdstr* path);
 
 #endif /* GRPC_CORE_EXT_CLIENT_CONFIG_RESOLVER_RESULT_H */