--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/JavaScriptCore/wtf/ThreadingPthreads.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,391 @@
+/*
+ * Copyright (C) 2007, 2009 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 Computer, 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 "StdLibExtras.h"
+#include "ThreadIdentifierDataPthreads.h"
+#include "ThreadSpecific.h"
+#include "UnusedParam.h"
+#include <errno.h>
+
+#if !COMPILER(MSVC)
+#include <limits.h>
+#include <sys/time.h>
+#endif
+
+#if OS(ANDROID)
+#include "JNIUtility.h"
+#endif
+
+namespace WTF {
+
+typedef HashMap<ThreadIdentifier, pthread_t> ThreadMap;
+
+static Mutex* atomicallyInitializedStaticMutex;
+
+void clearPthreadHandleForIdentifier(ThreadIdentifier);
+
+static Mutex& threadMapMutex()
+{
+    DEFINE_STATIC_LOCAL(Mutex, mutex, ());
+    return mutex;
+}
+
+void initializeThreading()
+{
+    if (atomicallyInitializedStaticMutex)
+        return;
+
+    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 identifierByPthreadHandle(const pthread_t& pthreadHandle)
+{
+    MutexLocker locker(threadMapMutex());
+
+    ThreadMap::iterator i = threadMap().begin();
+    for (; i != threadMap().end(); ++i) {
+        if (pthread_equal(i->second, pthreadHandle))
+            return i->first;
+    }
+
+    return 0;
+}
+
+static ThreadIdentifier establishIdentifierForPthreadHandle(const pthread_t& pthreadHandle)
+{
+    ASSERT(!identifierByPthreadHandle(pthreadHandle));
+
+    MutexLocker locker(threadMapMutex());
+
+    static ThreadIdentifier identifierCount = 1;
+
+    threadMap().add(identifierCount, pthreadHandle);
+
+    return identifierCount++;
+}
+
+static pthread_t pthreadHandleForIdentifier(ThreadIdentifier id)
+{
+    MutexLocker locker(threadMapMutex());
+
+    return threadMap().get(id);
+}
+
+void clearPthreadHandleForIdentifier(ThreadIdentifier id)
+{
+    MutexLocker locker(threadMapMutex());
+
+    ASSERT(threadMap().contains(id));
+
+    threadMap().remove(id);
+}
+
+#if OS(ANDROID)
+// On the Android platform, threads must be registered with the VM before they run.
+struct ThreadData {
+    ThreadFunction entryPoint;
+    void* arg;
+};
+
+static void* runThreadWithRegistration(void* arg)
+{
+    ThreadData* data = static_cast<ThreadData*>(arg);
+    JavaVM* vm = JSC::Bindings::getJavaVM();
+    JNIEnv* env;
+    void* ret = 0;
+    if (vm->AttachCurrentThread(&env, 0) == JNI_OK) {
+        ret = data->entryPoint(data->arg);
+        vm->DetachCurrentThread();
+    }
+    delete data;
+    return ret;
+}
+
+ThreadIdentifier createThreadInternal(ThreadFunction entryPoint, void* data, const char*)
+{
+    pthread_t threadHandle;
+    ThreadData* threadData = new ThreadData();
+    threadData->entryPoint = entryPoint;
+    threadData->arg = data;
+
+    if (pthread_create(&threadHandle, 0, runThreadWithRegistration, static_cast<void*>(threadData))) {
+        LOG_ERROR("Failed to create pthread at entry point %p with data %p", entryPoint, data);
+        delete threadData;
+        return 0;
+    }
+    return establishIdentifierForPthreadHandle(threadHandle);
+}
+#else
+ThreadIdentifier createThreadInternal(ThreadFunction entryPoint, void* data, const char*)
+{
+    pthread_t threadHandle;
+    if (pthread_create(&threadHandle, 0, entryPoint, data)) {
+        LOG_ERROR("Failed to create pthread at entry point %p with data %p", entryPoint, data);
+        return 0;
+    }
+
+    return establishIdentifierForPthreadHandle(threadHandle);
+}
+#endif
+
+void initializeCurrentThreadInternal(const char* threadName)
+{
+#if HAVE(PTHREAD_SETNAME_NP)
+    pthread_setname_np(threadName);
+#else
+    UNUSED_PARAM(threadName);
+#endif
+
+    ThreadIdentifier id = identifierByPthreadHandle(pthread_self());
+    ASSERT(id);
+    ThreadIdentifierData::initialize(id);
+}
+
+int waitForThreadCompletion(ThreadIdentifier threadID, void** result)
+{
+    ASSERT(threadID);
+
+    pthread_t pthreadHandle = pthreadHandleForIdentifier(threadID);
+    if (!pthreadHandle)
+        return 0;
+
+    int joinResult = pthread_join(pthreadHandle, result);
+    if (joinResult == EDEADLK)
+        LOG_ERROR("ThreadIdentifier %u was found to be deadlocked trying to quit", threadID);
+
+    return joinResult;
+}
+
+void detachThread(ThreadIdentifier threadID)
+{
+    ASSERT(threadID);
+
+    pthread_t pthreadHandle = pthreadHandleForIdentifier(threadID);
+    if (!pthreadHandle)
+        return;
+
+    pthread_detach(pthreadHandle);
+}
+
+ThreadIdentifier currentThread()
+{
+    ThreadIdentifier id = ThreadIdentifierData::identifier();
+    if (id)
+        return id;
+
+    // Not a WTF-created thread, ThreadIdentifier is not established yet.
+    id = establishIdentifierForPthreadHandle(pthread_self());
+    ThreadIdentifierData::initialize(id);
+    return id;
+}
+
+Mutex::Mutex()
+{
+#if PTHREAD_MUTEX_NORMAL == PTHREAD_MUTEX_DEFAULT
+
+    pthread_mutex_init(&m_mutex, 0);
+
+#else
+
+    pthread_mutexattr_t attr;
+    pthread_mutexattr_init(&attr);
+    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
+
+    pthread_mutex_init(&m_mutex, &attr);
+
+    pthread_mutexattr_destroy(&attr);
+
+#endif
+}
+
+Mutex::~Mutex()
+{
+    pthread_mutex_destroy(&m_mutex);
+}
+
+void Mutex::lock()
+{
+    int result = pthread_mutex_lock(&m_mutex);
+    ASSERT_UNUSED(result, !result);
+}
+
+bool Mutex::tryLock()
+{
+    int result = pthread_mutex_trylock(&m_mutex);
+
+    if (result == 0)
+        return true;
+    if (result == EBUSY)
+        return false;
+
+    ASSERT_NOT_REACHED();
+    return false;
+}
+
+void Mutex::unlock()
+{
+    int result = pthread_mutex_unlock(&m_mutex);
+    ASSERT_UNUSED(result, !result);
+}
+
+#if HAVE(PTHREAD_RWLOCK)
+ReadWriteLock::ReadWriteLock()
+{
+    pthread_rwlock_init(&m_readWriteLock, NULL);
+}
+
+ReadWriteLock::~ReadWriteLock()
+{
+    pthread_rwlock_destroy(&m_readWriteLock);
+}
+
+void ReadWriteLock::readLock()
+{
+    int result = pthread_rwlock_rdlock(&m_readWriteLock);
+    ASSERT_UNUSED(result, !result);
+}
+
+bool ReadWriteLock::tryReadLock()
+{
+    int result = pthread_rwlock_tryrdlock(&m_readWriteLock);
+
+    if (result == 0)
+        return true;
+    if (result == EBUSY || result == EAGAIN)
+        return false;
+
+    ASSERT_NOT_REACHED();
+    return false;
+}
+
+void ReadWriteLock::writeLock()
+{
+    int result = pthread_rwlock_wrlock(&m_readWriteLock);
+    ASSERT_UNUSED(result, !result);
+}
+
+bool ReadWriteLock::tryWriteLock()
+{
+    int result = pthread_rwlock_trywrlock(&m_readWriteLock);
+
+    if (result == 0)
+        return true;
+    if (result == EBUSY || result == EAGAIN)
+        return false;
+
+    ASSERT_NOT_REACHED();
+    return false;
+}
+
+void ReadWriteLock::unlock()
+{
+    int result = pthread_rwlock_unlock(&m_readWriteLock);
+    ASSERT_UNUSED(result, !result);
+}
+#endif  // HAVE(PTHREAD_RWLOCK)
+
+ThreadCondition::ThreadCondition()
+{ 
+    pthread_cond_init(&m_condition, NULL);
+}
+
+ThreadCondition::~ThreadCondition()
+{
+    pthread_cond_destroy(&m_condition);
+}
+    
+void ThreadCondition::wait(Mutex& mutex)
+{
+    int result = pthread_cond_wait(&m_condition, &mutex.impl());
+    ASSERT_UNUSED(result, !result);
+}
+
+bool ThreadCondition::timedWait(Mutex& mutex, double absoluteTime)
+{
+    if (absoluteTime < currentTime())
+        return false;
+
+    if (absoluteTime > INT_MAX) {
+        wait(mutex);
+        return true;
+    }
+
+    int timeSeconds = static_cast<int>(absoluteTime);
+    int timeNanoseconds = static_cast<int>((absoluteTime - timeSeconds) * 1E9);
+
+    timespec targetTime;
+    targetTime.tv_sec = timeSeconds;
+    targetTime.tv_nsec = timeNanoseconds;
+
+    return pthread_cond_timedwait(&m_condition, &mutex.impl(), &targetTime) == 0;
+}
+
+void ThreadCondition::signal()
+{
+    int result = pthread_cond_signal(&m_condition);
+    ASSERT_UNUSED(result, !result);
+}
+
+void ThreadCondition::broadcast()
+{
+    int result = pthread_cond_broadcast(&m_condition);
+    ASSERT_UNUSED(result, !result);
+}
+
+} // namespace WTF
+
+#endif // USE(PTHREADS)