mirror of https://gitee.com/bigwinds/arangodb
80 lines
2.0 KiB
C++
80 lines
2.0 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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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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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_BASICS_WORKER_THREAD_H
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#define ARANGODB_BASICS_WORKER_THREAD_H 1
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#include "Basics/Common.h"
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#include "Basics/Thread.h"
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namespace arangodb {
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namespace basics {
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class WorkerThread : public Thread {
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public:
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WorkerThread(WorkerThread const&) = delete;
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WorkerThread operator=(WorkerThread const&) = delete;
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WorkerThread(ThreadPool* pool)
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: Thread(pool->name()), _pool(pool), _status(0) {}
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~WorkerThread() {shutdown();}
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//////////////////////////////////////////////////////////////////////////////
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/// @brief stops the worker thread
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//////////////////////////////////////////////////////////////////////////////
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void waitForDone() {
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int expected = 0;
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_status.compare_exchange_strong(expected, 1, std::memory_order_relaxed);
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while (_status != 2) {
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usleep(5000);
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}
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}
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protected:
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void run() {
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while (_status == 0) {
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std::function<void()> task;
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if (!_pool->dequeue(task)) {
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break;
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}
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task();
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}
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_status = 2;
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}
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private:
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ThreadPool* _pool;
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std::atomic<int> _status;
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};
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}
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}
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#endif
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