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https://github.com/openharmony/utils_native.git
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liujialiang
5d65c00cd0
If someone include ssemaphore_ex.h and thread_pool.h at the same time, there will be a problem of redefinition. Signed-off-by: liujialiang <liujialiang10@huawei.com> Change-Id: I2a392cbe61b3500d65d47bc1d6c5800be86bf0b0
69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
/*
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* Copyright (c) 2021 Huawei Device Co., Ltd.
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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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#ifndef THREAD_POOL_H
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#define THREAD_POOL_H
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#include "nocopyable.h"
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#include <thread>
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#include <mutex>
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#include <functional>
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#include <string>
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#include <condition_variable>
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#include <deque>
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#include <vector>
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namespace OHOS {
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class ThreadPool : public NoCopyable {
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public:
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typedef std::function<void()> Task;
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explicit ThreadPool(const std::string &name = std::string());
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~ThreadPool();
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uint32_t Start(int threadsNum);
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void Stop();
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void AddTask(const Task& f);
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void SetMaxTaskNum(int maxSize) { maxTaskNum_ = maxSize; }
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// for testability
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size_t GetMaxTaskNum() const { return maxTaskNum_; }
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size_t GetCurTaskNum();
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size_t GetThreadsNum() const { return threads_.size(); }
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std::string GetName() const { return myName_; }
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private:
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// tasks in the queue reach the maximum set by maxQueueSize, means thread pool is full load.
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bool Overloaded() const;
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void WorkInThread(); // main function in each thread.
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Task ScheduleTask(); // fetch a task from the queue and execute
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private:
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std::string myName_;
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std::mutex mutex_;
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std::condition_variable hasTaskToDo_;
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std::condition_variable acceptNewTask_;
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std::vector<std::thread> threads_;
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std::deque<Task> tasks_;
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size_t maxTaskNum_;
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bool running_;
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};
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} // namespace OHOS
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#endif
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