JavaScriptCore-1097.3.tar.gz

[apple/javascriptcore.git] / wtf / ThreadingPrimitives.h

diff --git a/wtf/ThreadingPrimitives.h b/wtf/ThreadingPrimitives.h
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-/*
- * Copyright (C) 2007, 2008, 2010 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.
- *
- */
-
-#ifndef ThreadingPrimitives_h
-#define ThreadingPrimitives_h
-
-#include "Platform.h"
-
-#include <wtf/Assertions.h>
-#include <wtf/FastAllocBase.h>
-#include <wtf/Locker.h>
-#include <wtf/Noncopyable.h>
-
-#if OS(WINDOWS)
-#include <windows.h>
-#endif
-
-#if USE(PTHREADS)
-#include <pthread.h>
-#elif PLATFORM(GTK)
-#include "GOwnPtr.h"
-#endif
-
-#if PLATFORM(QT)
-#include <qglobal.h>
-QT_BEGIN_NAMESPACE
-class QMutex;
-class QWaitCondition;
-QT_END_NAMESPACE
-#endif
-
-namespace WTF {
-
-#if USE(PTHREADS)
-typedef pthread_mutex_t PlatformMutex;
-#if HAVE(PTHREAD_RWLOCK)
-typedef pthread_rwlock_t PlatformReadWriteLock;
-#else
-typedef void* PlatformReadWriteLock;
-#endif
-typedef pthread_cond_t PlatformCondition;
-#elif PLATFORM(GTK)
-typedef GOwnPtr<GMutex> PlatformMutex;
-typedef void* PlatformReadWriteLock; // FIXME: Implement.
-typedef GOwnPtr<GCond> PlatformCondition;
-#elif PLATFORM(QT)
-typedef QT_PREPEND_NAMESPACE(QMutex)* PlatformMutex;
-typedef void* PlatformReadWriteLock; // FIXME: Implement.
-typedef QT_PREPEND_NAMESPACE(QWaitCondition)* PlatformCondition;
-#elif OS(WINDOWS)
-struct PlatformMutex {
-    CRITICAL_SECTION m_internalMutex;
-    size_t m_recursionCount;
-};
-typedef void* PlatformReadWriteLock; // FIXME: Implement.
-struct PlatformCondition {
-    size_t m_waitersGone;
-    size_t m_waitersBlocked;
-    size_t m_waitersToUnblock; 
-    HANDLE m_blockLock;
-    HANDLE m_blockQueue;
-    HANDLE m_unblockLock;
-
-    bool timedWait(PlatformMutex&, DWORD durationMilliseconds);
-    void signal(bool unblockAll);
-};
-#else
-typedef void* PlatformMutex;
-typedef void* PlatformReadWriteLock;
-typedef void* PlatformCondition;
-#endif
-    
-class Mutex {
-    WTF_MAKE_NONCOPYABLE(Mutex); WTF_MAKE_FAST_ALLOCATED;
-public:
-    Mutex();
-    ~Mutex();
-
-    void lock();
-    bool tryLock();
-    void unlock();
-
-public:
-    PlatformMutex& impl() { return m_mutex; }
-private:
-    PlatformMutex m_mutex;
-};
-
-typedef Locker<Mutex> MutexLocker;
-
-class ReadWriteLock {
-    WTF_MAKE_NONCOPYABLE(ReadWriteLock);
-public:
-    ReadWriteLock();
-    ~ReadWriteLock();
-
-    void readLock();
-    bool tryReadLock();
-
-    void writeLock();
-    bool tryWriteLock();
-    
-    void unlock();
-
-private:
-    PlatformReadWriteLock m_readWriteLock;
-};
-
-class ThreadCondition {
-    WTF_MAKE_NONCOPYABLE(ThreadCondition);
-public:
-    ThreadCondition();
-    ~ThreadCondition();
-    
-    void wait(Mutex& mutex);
-    // Returns true if the condition was signaled before absoluteTime, false if the absoluteTime was reached or is in the past.
-    // The absoluteTime is in seconds, starting on January 1, 1970. The time is assumed to use the same time zone as WTF::currentTime().
-    bool timedWait(Mutex&, double absoluteTime);
-    void signal();
-    void broadcast();
-    
-private:
-    PlatformCondition m_condition;
-};
-
-#if OS(WINDOWS)
-// The absoluteTime is in seconds, starting on January 1, 1970. The time is assumed to use the same time zone as WTF::currentTime().
-// Returns an interval in milliseconds suitable for passing to one of the Win32 wait functions (e.g., ::WaitForSingleObject).
-DWORD absoluteTimeToWaitTimeoutInterval(double absoluteTime);
-#endif
-
-} // namespace WTF
-
-using WTF::Mutex;
-using WTF::MutexLocker;
-using WTF::ThreadCondition;
-
-#if OS(WINDOWS)
-using WTF::absoluteTimeToWaitTimeoutInterval;
-#endif
-
-#endif // ThreadingPrimitives_h