projects / apple / javascriptcore.git / blame
| Commit | Line | Data |
|---|---|---|
| 14957cd0 A |
1 | /* |
| 2 | * Copyright (C) 2011 University of Szeged | |
| 3 | * Copyright (C) 2011 Gabor Loki <loki@webkit.org> | |
| 4 | * All rights reserved. | |
| 5 | * | |
| 6 | * Redistribution and use in source and binary forms, with or without | |
| 7 | * modification, are permitted provided that the following conditions | |
| 8 | * are met: | |
| 9 | * 1. Redistributions of source code must retain the above copyright | |
| 10 | * notice, this list of conditions and the following disclaimer. | |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer in the | |
| 13 | * documentation and/or other materials provided with the distribution. | |
| 14 | * | |
| 15 | * THIS SOFTWARE IS PROVIDED BY UNIVERSITY OF SZEGED ``AS IS'' AND ANY | |
| 16 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 18 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL UNIVERSITY OF SZEGED OR | |
| 19 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 21 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 22 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 23 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 25 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 | */ | |
| 27 | ||
| 28 | #include "config.h" | |
| 29 | ||
| 30 | #if ENABLE(PARALLEL_JOBS) && ENABLE(THREADING_GENERIC) | |
| 31 | ||
| 32 | #include "ParallelJobs.h" | |
| 33 | ||
| 34 | namespace WTF { | |
| 35 | ||
| 36 | Vector< RefPtr<ParallelEnvironment::ThreadPrivate> >* ParallelEnvironment::s_threadPool = 0; | |
| 37 | ||
| 38 | bool ParallelEnvironment::ThreadPrivate::tryLockFor(ParallelEnvironment* parent) | |
| 39 | { | |
| 40 | bool locked = m_mutex.tryLock(); | |
| 41 | ||
| 42 | if (!locked) | |
| 43 | return false; | |
| 44 | ||
| 45 | if (m_parent) { | |
| 46 | m_mutex.unlock(); | |
| 47 | return false; | |
| 48 | } | |
| 49 | ||
| 50 | if (!m_threadID) | |
| 51 | m_threadID = createThread(&ParallelEnvironment::ThreadPrivate::workerThread, this, "Parallel worker"); | |
| 52 | ||
| 53 | if (m_threadID) | |
| 54 | m_parent = parent; | |
| 55 | ||
| 56 | m_mutex.unlock(); | |
| 57 | return m_threadID; | |
| 58 | } | |
| 59 | ||
| 60 | void ParallelEnvironment::ThreadPrivate::execute(ThreadFunction threadFunction, void* parameters) | |
| 61 | { | |
| 62 | MutexLocker lock(m_mutex); | |
| 63 | ||
| 64 | m_threadFunction = threadFunction; | |
| 65 | m_parameters = parameters; | |
| 66 | m_running = true; | |
| 67 | m_threadCondition.signal(); | |
| 68 | } | |
| 69 | ||
| 70 | void ParallelEnvironment::ThreadPrivate::waitForFinish() | |
| 71 | { | |
| 72 | MutexLocker lock(m_mutex); | |
| 73 | ||
| 74 | while (m_running) | |
| 75 | m_threadCondition.wait(m_mutex); | |
| 76 | } | |
| 77 | ||
| 78 | void* ParallelEnvironment::ThreadPrivate::workerThread(void* threadData) | |
| 79 | { | |
| 80 | ThreadPrivate* sharedThread = reinterpret_cast<ThreadPrivate*>(threadData); | |
| 81 | MutexLocker lock(sharedThread->m_mutex); | |
| 82 | ||
| 83 | while (sharedThread->m_threadID) { | |
| 84 | if (sharedThread->m_running) { | |
| 85 | (*sharedThread->m_threadFunction)(sharedThread->m_parameters); | |
| 86 | sharedThread->m_running = false; | |
| 87 | sharedThread->m_parent = 0; | |
| 88 | sharedThread->m_threadCondition.signal(); | |
| 89 | } | |
| 90 | ||
| 91 | sharedThread->m_threadCondition.wait(sharedThread->m_mutex); | |
| 92 | } | |
| 93 | return 0; | |
| 94 | } | |
| 95 | ||
| 96 | } // namespace WTF | |
| 97 | ||
| 98 | #endif // ENABLE(PARALLEL_JOBS) && ENABLE(THREADING_GENERIC) |