client_channel_factory.cc

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/*
 *
 * Copyright 2015 gRPC authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
 
#include <grpc/support/port_platform.h>
 
#include "src/core/ext/filters/client_channel/client_channel_factory.h"
 
#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/gpr/useful.h"
 
// Channel arg key for client channel factory.
#define GRPC_ARG_CLIENT_CHANNEL_FACTORY "grpc.client_channel_factory"
 
namespace grpc_core {
 
namespace {
 
void* factory_arg_copy(void* f) { return f; }
void factory_arg_destroy(void* /*f*/) {}
int factory_arg_cmp(void* factory1, void* factory2) {
  return QsortCompare(factory1, factory2);
}
const grpc_arg_pointer_vtable factory_arg_vtable = {
    factory_arg_copy, factory_arg_destroy, factory_arg_cmp};
 
}  // namespace
 
absl::string_view ClientChannelFactory::ChannelArgName() {
  return GRPC_ARG_CLIENT_CHANNEL_FACTORY;
}
 
grpc_arg ClientChannelFactory::CreateChannelArg(ClientChannelFactory* factory) {
  return grpc_channel_arg_pointer_create(
      const_cast<char*>(GRPC_ARG_CLIENT_CHANNEL_FACTORY), factory,
      &factory_arg_vtable);
}
 
ClientChannelFactory* ClientChannelFactory::GetFromChannelArgs(
    const grpc_channel_args* args) {
  const grpc_arg* arg =
      grpc_channel_args_find(args, GRPC_ARG_CLIENT_CHANNEL_FACTORY);
  if (arg == nullptr || arg->type != GRPC_ARG_POINTER) return nullptr;
  return static_cast<ClientChannelFactory*>(arg->value.pointer.p);
}
 
}  // namespace grpc_core