| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| #ifndef ThreadingPrimitives_h |
| #define ThreadingPrimitives_h |
| |
| #include <wtf/Assertions.h> |
| #include <wtf/FastMalloc.h> |
| #include <wtf/Locker.h> |
| #include <wtf/Noncopyable.h> |
| |
| #if OS(WINDOWS) |
| #include <windows.h> |
| #endif |
| |
| #if USE(PTHREADS) |
| #include <pthread.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); |
| }; |
| #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 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::ThreadCondition; |
| |
| #if OS(WINDOWS) |
| using WTF::absoluteTimeToWaitTimeoutInterval; |
| #endif |
| |
| #endif // ThreadingPrimitives_h |