1 /* 2 * 3 * Copyright 2016 gRPC authors. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 19 #ifndef GRPCPP_IMPL_CODEGEN_GRPC_LIBRARY_H 20 #define GRPCPP_IMPL_CODEGEN_GRPC_LIBRARY_H 21 22 #include <grpcpp/impl/codegen/core_codegen_interface.h> 23 24 namespace grpc { 25 26 class GrpcLibraryInterface { 27 public: 28 virtual ~GrpcLibraryInterface() = default; 29 virtual void init() = 0; 30 virtual void shutdown() = 0; 31 }; 32 33 /// Initialized by \a grpc::GrpcLibraryInitializer from 34 /// <grpcpp/impl/grpc_library.h> 35 extern GrpcLibraryInterface* g_glip; 36 37 /// Classes that require gRPC to be initialized should inherit from this class. 38 class GrpcLibraryCodegen { 39 public: grpc_init_called_(false)40 GrpcLibraryCodegen(bool call_grpc_init = true) : grpc_init_called_(false) { 41 if (call_grpc_init) { 42 GPR_CODEGEN_ASSERT(g_glip && 43 "gRPC library not initialized. See " 44 "grpc::internal::GrpcLibraryInitializer."); 45 g_glip->init(); 46 grpc_init_called_ = true; 47 } 48 } ~GrpcLibraryCodegen()49 virtual ~GrpcLibraryCodegen() { 50 if (grpc_init_called_) { 51 GPR_CODEGEN_ASSERT(g_glip && 52 "gRPC library not initialized. See " 53 "grpc::internal::GrpcLibraryInitializer."); 54 g_glip->shutdown(); 55 } 56 } 57 58 private: 59 bool grpc_init_called_; 60 }; 61 62 } // namespace grpc 63 64 #endif // GRPCPP_IMPL_CODEGEN_GRPC_LIBRARY_H 65