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119 lines
3.2 KiB
C++
119 lines
3.2 KiB
C++
/*============================================================================*/
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/*
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VFLib: https://github.com/vinniefalco/VFLib
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Copyright (C) 2008 by Vinnie Falco <vinnie.falco@gmail.com>
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This library contains portions of other open source products covered by
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separate licenses. Please see the corresponding source files for specific
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terms.
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VFLib is provided under the terms of The MIT License (MIT):
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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IN THE SOFTWARE.
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*/
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/*============================================================================*/
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void ThreadGroup::QuitType::operator () (Worker* worker)
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{
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worker->setShouldExit ();
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}
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//==============================================================================
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ThreadGroup::Worker::Worker (String name, ThreadGroup& group)
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: Thread (name)
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, m_group (group)
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, m_shouldExit (false)
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{
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startThread ();
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}
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ThreadGroup::Worker::~Worker ()
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{
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// Make sure the thread is stopped.
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stopThread (-1);
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}
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void ThreadGroup::Worker::setShouldExit ()
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{
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m_shouldExit = true;
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}
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void ThreadGroup::Worker::run ()
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{
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do
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{
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m_group.m_semaphore.wait ();
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Work* work = m_group.m_queue.pop_front ();
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bassert (work != nullptr);
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work->operator () (this);
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delete work;
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}
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while (!m_shouldExit);
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}
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//==============================================================================
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ThreadGroup::ThreadGroup (int numberOfThreads)
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: m_numberOfThreads (numberOfThreads)
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, m_semaphore (0)
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{
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for (int i = 0; i++ < numberOfThreads; )
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{
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String s;
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s << "ThreadGroup (" << i << ")";
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m_threads.push_front (new Worker (s, *this));
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}
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}
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ThreadGroup::~ThreadGroup ()
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{
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// Put one quit item in the queue for each worker to stop.
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for (int i = 0; i < m_numberOfThreads; ++i)
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{
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m_queue.push_front (new (getAllocator ()) QuitType);
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m_semaphore.signal ();
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}
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for (;;)
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{
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Worker* worker = m_threads.pop_front ();
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if (worker != nullptr)
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delete worker;
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else
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break;
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}
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// There must not be pending work!
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bassert (m_queue.pop_front () == nullptr);
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}
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int ThreadGroup::getNumberOfThreads () const
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{
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return m_numberOfThreads;
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}
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