From cad810f21b803229eb11403f9209855525a25d57 Mon Sep 17 00:00:00 2001 From: Steve Block Date: Fri, 6 May 2011 11:45:16 +0100 Subject: Merge WebKit at r75315: Initial merge by git. Change-Id: I570314b346ce101c935ed22a626b48c2af266b84 --- Source/JavaScriptCore/wtf/gtk/ThreadingGtk.cpp | 248 +++++++++++++++++++++++++ 1 file changed, 248 insertions(+) create mode 100644 Source/JavaScriptCore/wtf/gtk/ThreadingGtk.cpp (limited to 'Source/JavaScriptCore/wtf/gtk/ThreadingGtk.cpp') diff --git a/Source/JavaScriptCore/wtf/gtk/ThreadingGtk.cpp b/Source/JavaScriptCore/wtf/gtk/ThreadingGtk.cpp new file mode 100644 index 0000000..863ee81 --- /dev/null +++ b/Source/JavaScriptCore/wtf/gtk/ThreadingGtk.cpp @@ -0,0 +1,248 @@ +/* + * Copyright (C) 2007, 2008 Apple Inc. All rights reserved. + * Copyright (C) 2007 Justin Haygood (jhaygood@reaktix.com) + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Apple Inc. ("Apple") nor the names of + * its contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" +#include "Threading.h" + +#if !USE(PTHREADS) + +#include "CurrentTime.h" +#include "HashMap.h" +#include "MainThread.h" +#include "RandomNumberSeed.h" +#include + +#include +#include + +namespace WTF { + +typedef HashMap ThreadMap; + +static Mutex* atomicallyInitializedStaticMutex; + +static Mutex& threadMapMutex() +{ + DEFINE_STATIC_LOCAL(Mutex, mutex, ()); + return mutex; +} + +void initializeThreading() +{ + if (!g_thread_supported()) + g_thread_init(NULL); + ASSERT(g_thread_supported()); + + if (!atomicallyInitializedStaticMutex) { + atomicallyInitializedStaticMutex = new Mutex; + threadMapMutex(); + initializeRandomNumberGenerator(); + } +} + +void lockAtomicallyInitializedStaticMutex() +{ + ASSERT(atomicallyInitializedStaticMutex); + atomicallyInitializedStaticMutex->lock(); +} + +void unlockAtomicallyInitializedStaticMutex() +{ + atomicallyInitializedStaticMutex->unlock(); +} + +static ThreadMap& threadMap() +{ + DEFINE_STATIC_LOCAL(ThreadMap, map, ()); + return map; +} + +static ThreadIdentifier identifierByGthreadHandle(GThread*& thread) +{ + MutexLocker locker(threadMapMutex()); + + ThreadMap::iterator i = threadMap().begin(); + for (; i != threadMap().end(); ++i) { + if (i->second == thread) + return i->first; + } + + return 0; +} + +static ThreadIdentifier establishIdentifierForThread(GThread*& thread) +{ + ASSERT(!identifierByGthreadHandle(thread)); + + MutexLocker locker(threadMapMutex()); + + static ThreadIdentifier identifierCount = 1; + + threadMap().add(identifierCount, thread); + + return identifierCount++; +} + +static GThread* threadForIdentifier(ThreadIdentifier id) +{ + MutexLocker locker(threadMapMutex()); + + return threadMap().get(id); +} + +static void clearThreadForIdentifier(ThreadIdentifier id) +{ + MutexLocker locker(threadMapMutex()); + + ASSERT(threadMap().contains(id)); + + threadMap().remove(id); +} + +ThreadIdentifier createThreadInternal(ThreadFunction entryPoint, void* data, const char*) +{ + GThread* thread; + if (!(thread = g_thread_create(entryPoint, data, TRUE, 0))) { + LOG_ERROR("Failed to create thread at entry point %p with data %p", entryPoint, data); + return 0; + } + + ThreadIdentifier threadID = establishIdentifierForThread(thread); + return threadID; +} + +void initializeCurrentThreadInternal(const char*) +{ +} + +int waitForThreadCompletion(ThreadIdentifier threadID, void** result) +{ + ASSERT(threadID); + + GThread* thread = threadForIdentifier(threadID); + + void* joinResult = g_thread_join(thread); + if (result) + *result = joinResult; + + clearThreadForIdentifier(threadID); + return 0; +} + +void detachThread(ThreadIdentifier) +{ +} + +ThreadIdentifier currentThread() +{ + GThread* currentThread = g_thread_self(); + if (ThreadIdentifier id = identifierByGthreadHandle(currentThread)) + return id; + return establishIdentifierForThread(currentThread); +} + +void yield() +{ + g_thread_yield(); +} + +Mutex::Mutex() + : m_mutex(g_mutex_new()) +{ +} + +Mutex::~Mutex() +{ +} + +void Mutex::lock() +{ + g_mutex_lock(m_mutex.get()); +} + +bool Mutex::tryLock() +{ + return g_mutex_trylock(m_mutex.get()); +} + +void Mutex::unlock() +{ + g_mutex_unlock(m_mutex.get()); +} + +ThreadCondition::ThreadCondition() + : m_condition(g_cond_new()) +{ +} + +ThreadCondition::~ThreadCondition() +{ +} + +void ThreadCondition::wait(Mutex& mutex) +{ + g_cond_wait(m_condition.get(), mutex.impl().get()); +} + +bool ThreadCondition::timedWait(Mutex& mutex, double absoluteTime) +{ + // Time is in the past - return right away. + if (absoluteTime < currentTime()) + return false; + + // Time is too far in the future for g_cond_timed_wait - wait forever. + if (absoluteTime > INT_MAX) { + wait(mutex); + return true; + } + + int timeSeconds = static_cast(absoluteTime); + int timeMicroseconds = static_cast((absoluteTime - timeSeconds) * 1000000.0); + + GTimeVal targetTime; + targetTime.tv_sec = timeSeconds; + targetTime.tv_usec = timeMicroseconds; + + return g_cond_timed_wait(m_condition.get(), mutex.impl().get(), &targetTime); +} + +void ThreadCondition::signal() +{ + g_cond_signal(m_condition.get()); +} + +void ThreadCondition::broadcast() +{ + g_cond_broadcast(m_condition.get()); +} + + +} + +#endif // !USE(PTHREADS) -- cgit v1.1