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91 lines
2.4 KiB
C++
91 lines
2.4 KiB
C++
/*
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* Toonloop
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*
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* Copyright (c) 2010 Alexandre Quessy <alexandre@quessy.net>
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* Copyright (c) 2010 Tristan Matthews <le.businessman@gmail.com>
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*
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* Toonloop is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Toonloop is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the gnu general public license
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* along with Toonloop. If not, see <http://www.gnu.org/licenses/>.
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*/
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// Written by Anthony Williams, 2008
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// Public domain based on his comment:
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// "Yes, you can just copy the code presented here and use it for whatever you
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// like. There won't be any licensing issues. I'm glad you find it helpful."
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// Reference:
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// http://www.justsoftwaresolutions.co.uk/threading/implementing-a-thread-safe-queue-using-condition-variables.html
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#ifndef _CONCURRENT_QUEUE_H_
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#define _CONCURRENT_QUEUE_H_
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#include <queue>
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#include <QMutex>
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#include <QWaitCondition>
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#include "MM.h"
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MM_BEGIN_NAMESPACE
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template<typename Data>
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class ConcurrentQueue
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{
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private:
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std::queue<Data> queue_;
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QMutex mutex_;
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QWaitCondition condition_;
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public:
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ConcurrentQueue() : queue_(), mutex_(), condition_()
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{}
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void push(Data const& data)
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{
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QMutexLocker locker(&mutex_);
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queue_.push(data);
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condition_.wakeOne();
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}
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bool empty() const
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{
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QMutexLocker locker(&mutex_);
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return queue_.empty();
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}
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bool try_pop(Data& popped_value)
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{
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QMutexLocker locker(&mutex_);
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if (queue_.empty())
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{
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return false;
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}
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popped_value = queue_.front();
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queue_.pop();
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return true;
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}
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void wait_and_pop(Data& popped_value)
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{
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QMutexLocker locker(&mutex_);
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while (queue_.empty())
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{
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condition_.wait(&mutex_);
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}
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popped_value = queue_.front();
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queue_.pop();
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}
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};
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MM_END_NAMESPACE
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#endif // _CONCURRENT_QUEUE_H_
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