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/* 
 * 
 * Copyright 2016 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_CODEGEN_GRPC_LIBRARY_H 
#define GRPCPP_IMPL_CODEGEN_GRPC_LIBRARY_H 
 
#include <grpcpp/impl/codegen/core_codegen_interface.h> 
 
namespace grpc { 
 
class GrpcLibraryInterface { 
 public: 
  virtual ~GrpcLibraryInterface() = default; 
  virtual void init() = 0; 
  virtual void shutdown() = 0; 
}; 
 
/// Initialized by \a grpc::GrpcLibraryInitializer from 
/// <grpcpp/impl/grpc_library.h> 
extern GrpcLibraryInterface* g_glip; 
 
/// Classes that require gRPC to be initialized should inherit from this class. 
class GrpcLibraryCodegen { 
 public: 
  GrpcLibraryCodegen(bool call_grpc_init = true) : grpc_init_called_(false) { 
    if (call_grpc_init) { 
      GPR_CODEGEN_ASSERT(g_glip && 
                         "gRPC library not initialized. See " 
                         "grpc::internal::GrpcLibraryInitializer."); 
      g_glip->init(); 
      grpc_init_called_ = true; 
    } 
  } 
  virtual ~GrpcLibraryCodegen() { 
    if (grpc_init_called_) { 
      GPR_CODEGEN_ASSERT(g_glip && 
                         "gRPC library not initialized. See " 
                         "grpc::internal::GrpcLibraryInitializer."); 
      g_glip->shutdown(); 
    } 
  } 
 
 private: 
  bool grpc_init_called_; 
}; 
 
}  // namespace grpc 
 
#endif  // GRPCPP_IMPL_CODEGEN_GRPC_LIBRARY_H