THUAI6/CAPI/cpp/grpc/include/grpcpp/impl/grpc_library.h

/*
 *
 * 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.
 *
 */

#ifndef GRPCPP_IMPL_GRPC_LIBRARY_H
#define GRPCPP_IMPL_GRPC_LIBRARY_H

#include <iostream>

#include <grpc/grpc.h>
#include <grpcpp/impl/codegen/config.h>
#include <grpcpp/impl/codegen/core_codegen.h>
#include <grpcpp/impl/codegen/grpc_library.h>  // IWYU pragma: export

namespace grpc
{

    namespace internal
    {
        class GrpcLibrary final : public GrpcLibraryInterface
        {
        public:
            void init() override
            {
                grpc_init();
            }
            void shutdown() override
            {
                grpc_shutdown();
            }
        };

        /// Instantiating this class ensures the proper initialization of gRPC.
        class GrpcLibraryInitializer final
        {
        public:
            GrpcLibraryInitializer()
            {
                if (grpc::g_glip == nullptr)
                {
                    static auto* const g_gli = new GrpcLibrary();
                    grpc::g_glip = g_gli;
                }
                if (grpc::g_core_codegen_interface == nullptr)
                {
                    static auto* const g_core_codegen = new CoreCodegen();
                    grpc::g_core_codegen_interface = g_core_codegen;
                }
            }

            /// A no-op method to force the linker to reference this class, which will
            /// take care of initializing and shutting down the gRPC runtime.
            int summon()
            {
                return 0;
            }
        };

    }  // namespace internal
}  // namespace grpc

#endif  // GRPCPP_IMPL_GRPC_LIBRARY_H