| /* |
| * |
| * 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 GRPCXX_DYNAMIC_THREAD_POOL_H |
| #define GRPCXX_DYNAMIC_THREAD_POOL_H |
| |
| #include <grpc++/config.h> |
| |
| #include <grpc++/impl/sync.h> |
| #include <grpc++/impl/thd.h> |
| #include <grpc++/thread_pool_interface.h> |
| |
| #include <list> |
| #include <memory> |
| #include <queue> |
| |
| namespace grpc { |
| |
| class DynamicThreadPool GRPC_FINAL : public ThreadPoolInterface { |
| public: |
| explicit DynamicThreadPool(int reserve_threads); |
| ~DynamicThreadPool(); |
| |
| void Add(const std::function<void()>& callback) GRPC_OVERRIDE; |
| |
| private: |
| class DynamicThread { |
| public: |
| DynamicThread(DynamicThreadPool *pool); |
| ~DynamicThread(); |
| private: |
| DynamicThreadPool *pool_; |
| std::unique_ptr<grpc::thread> thd_; |
| void ThreadFunc(); |
| }; |
| grpc::mutex mu_; |
| grpc::condition_variable cv_; |
| grpc::condition_variable shutdown_cv_; |
| bool shutdown_; |
| std::queue<std::function<void()>> callbacks_; |
| int reserve_threads_; |
| int nthreads_; |
| int threads_waiting_; |
| std::list<DynamicThread*> dead_threads_; |
| |
| void ThreadFunc(); |
| static void ReapThreads(std::list<DynamicThread*>* tlist); |
| }; |
| |
| } // namespace grpc |
| |
| #endif // GRPCXX_DYNAMIC_THREAD_POOL_H |