| /* |
| * 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 <wtf/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> |
| #endif |
| |
| #if OS(STARBOARD) |
| #include "starboard/condition_variable.h" |
| #include "starboard/mutex.h" |
| #include "starboard/thread.h" |
| #endif |
| |
| namespace WTF { |
| |
| #if USE(PTHREADS) |
| typedef pthread_mutex_t PlatformMutex; |
| typedef pthread_cond_t PlatformCondition; |
| #elif OS(WINDOWS) |
| struct PlatformMutex { |
| CRITICAL_SECTION m_internalMutex; |
| size_t m_recursionCount; |
| }; |
| 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); |
| }; |
| #elif OS(STARBOARD) |
| typedef SbMutex PlatformMutex; |
| typedef SbConditionVariable PlatformCondition; |
| #else |
| typedef void* PlatformMutex; |
| typedef void* PlatformCondition; |
| #endif |
| |
| class Mutex { |
| WTF_MAKE_NONCOPYABLE(Mutex); WTF_MAKE_FAST_ALLOCATED; |
| public: |
| WTF_EXPORT_PRIVATE Mutex(); |
| WTF_EXPORT_PRIVATE ~Mutex(); |
| |
| WTF_EXPORT_PRIVATE void lock(); |
| WTF_EXPORT_PRIVATE bool tryLock(); |
| WTF_EXPORT_PRIVATE void unlock(); |
| |
| public: |
| PlatformMutex& impl() { return m_mutex; } |
| private: |
| PlatformMutex m_mutex; |
| }; |
| |
| typedef Locker<Mutex> MutexLocker; |
| |
| class MutexTryLocker { |
| WTF_MAKE_NONCOPYABLE(MutexTryLocker); |
| public: |
| MutexTryLocker(Mutex& mutex) : m_mutex(mutex), m_locked(mutex.tryLock()) { } |
| ~MutexTryLocker() |
| { |
| if (m_locked) |
| m_mutex.unlock(); |
| } |
| |
| bool locked() const { return m_locked; } |
| |
| private: |
| Mutex& m_mutex; |
| bool m_locked; |
| }; |
| |
| class ThreadCondition { |
| WTF_MAKE_NONCOPYABLE(ThreadCondition); |
| public: |
| WTF_EXPORT_PRIVATE ThreadCondition(); |
| WTF_EXPORT_PRIVATE ~ThreadCondition(); |
| |
| WTF_EXPORT_PRIVATE 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(). |
| WTF_EXPORT_PRIVATE bool timedWait(Mutex&, double absoluteTime); |
| WTF_EXPORT_PRIVATE void signal(); |
| WTF_EXPORT_PRIVATE 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). |
| WTF_EXPORT_PRIVATE DWORD absoluteTimeToWaitTimeoutInterval(double absoluteTime); |
| #endif |
| |
| } // namespace WTF |
| |
| using WTF::Mutex; |
| using WTF::MutexLocker; |
| using WTF::MutexTryLocker; |
| using WTF::ThreadCondition; |
| |
| #if OS(WINDOWS) |
| using WTF::absoluteTimeToWaitTimeoutInterval; |
| #endif |
| |
| #endif // ThreadingPrimitives_h |