mirror of https://gitee.com/bigwinds/arangodb
121 lines
3.7 KiB
C++
121 lines
3.7 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief thread pool worker thread
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2014 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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/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2013-2013, triAGENS GmbH, Cologne, Germany
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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 triagens {
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namespace basics {
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// -----------------------------------------------------------------------------
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// --SECTION-- WorkerThread
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// -----------------------------------------------------------------------------
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class WorkerThread : public triagens::basics::Thread {
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors / destructors
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// -----------------------------------------------------------------------------
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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()),
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_pool(pool),
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_status(0) {
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}
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~WorkerThread () {
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}
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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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// -----------------------------------------------------------------------------
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// --SECTION-- protected functions
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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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// -----------------------------------------------------------------------------
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// --SECTION-- private variables
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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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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
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// End:
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