69 lines
1.7 KiB
C++
69 lines
1.7 KiB
C++
/*
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*
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* Copyright 2015 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#ifndef GRPC_INTERNAL_CPP_DYNAMIC_THREAD_POOL_H
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#define GRPC_INTERNAL_CPP_DYNAMIC_THREAD_POOL_H
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#include <list>
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#include <memory>
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#include <queue>
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#include <grpcpp/support/config.h>
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#include "src/core/lib/gprpp/sync.h"
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#include "src/core/lib/gprpp/thd.h"
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#include "src/cpp/server/thread_pool_interface.h"
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namespace grpc {
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class DynamicThreadPool final : public ThreadPoolInterface {
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public:
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explicit DynamicThreadPool(int reserve_threads);
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~DynamicThreadPool() override;
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void Add(const std::function<void()>& callback) override;
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private:
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class DynamicThread {
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public:
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explicit DynamicThread(DynamicThreadPool* pool);
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~DynamicThread();
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private:
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DynamicThreadPool* pool_;
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grpc_core::Thread thd_;
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void ThreadFunc();
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};
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grpc_core::Mutex mu_;
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grpc_core::CondVar cv_;
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grpc_core::CondVar shutdown_cv_;
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bool shutdown_;
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std::queue<std::function<void()>> callbacks_;
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int reserve_threads_;
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int nthreads_;
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int threads_waiting_;
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std::list<DynamicThread*> dead_threads_;
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void ThreadFunc();
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static void ReapThreads(std::list<DynamicThread*>* tlist);
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};
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} // namespace grpc
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#endif // GRPC_INTERNAL_CPP_DYNAMIC_THREAD_POOL_H
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