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106 lines
2.7 KiB
C++
106 lines
2.7 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of Beast: https://github.com/vinniefalco/Beast
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Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 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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