Move files in wtf/ to platform/wtf/ (Part 7).

third_party/WebKit/Source/wtf/ThreadingPrimitives.h

-/*
- * 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.
- *
- */
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 
-#ifndef ThreadingPrimitives_h
-#define ThreadingPrimitives_h
+#include "platform/wtf/ThreadingPrimitives.h"
 
-#include "wtf/Allocator.h"
-#include "wtf/Assertions.h"
-#include "wtf/Locker.h"
-#include "wtf/Noncopyable.h"
-#include "wtf/WTFExport.h"
-
-#if OS(WIN)
-#include <windows.h>
-#endif
-
-#if OS(POSIX)
-#include <pthread.h>
-#endif
-
-namespace WTF {
-
-#if OS(POSIX)
-struct PlatformMutex {
-  pthread_mutex_t m_internalMutex;
-#if DCHECK_IS_ON()
-  size_t m_recursionCount;
-#endif
-};
-typedef pthread_cond_t PlatformCondition;
-#elif OS(WIN)
-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 WTF_EXPORT MutexBase {
-  WTF_MAKE_NONCOPYABLE(MutexBase);
-  USING_FAST_MALLOC(MutexBase);
-
- public:
-  ~MutexBase();
-
-  void lock();
-  void unlock();
-#if DCHECK_IS_ON()
-  bool locked() { return m_mutex.m_recursionCount > 0; }
-#endif
-
- public:
-  PlatformMutex& impl() { return m_mutex; }
-
- protected:
-  MutexBase(bool recursive);
-
-  PlatformMutex m_mutex;
-};
-
-class WTF_EXPORT Mutex : public MutexBase {
- public:
-  Mutex() : MutexBase(false) {}
-  bool tryLock();
-};
-
-class WTF_EXPORT RecursiveMutex : public MutexBase {
- public:
-  RecursiveMutex() : MutexBase(true) {}
-  bool tryLock();
-};
-
-typedef Locker<MutexBase> MutexLocker;
-
-class MutexTryLocker final {
-  STACK_ALLOCATED();
-  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 WTF_EXPORT ThreadCondition final {
-  USING_FAST_MALLOC(ThreadCondition);  // Only HeapTest.cpp requires.
-  WTF_MAKE_NONCOPYABLE(ThreadCondition);
-
- public:
-  ThreadCondition();
-  ~ThreadCondition();
-
-  void wait(MutexBase&);
-  // 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(MutexBase&, double absoluteTime);
-  void signal();
-  void broadcast();
-
- private:
-  PlatformCondition m_condition;
-};
-
-#if OS(WIN)
-// 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::MutexBase;
-using WTF::Mutex;
-using WTF::RecursiveMutex;
-using WTF::MutexLocker;
-using WTF::MutexTryLocker;
-using WTF::ThreadCondition;
-
-#if OS(WIN)
-using WTF::absoluteTimeToWaitTimeoutInterval;
-#endif
-
-#endif  // ThreadingPrimitives_h
+// The contents of this header was moved to platform/wtf as part of
+// WTF migration project. See the following post for details:
+// https://groups.google.com/a/chromium.org/d/msg/blink-dev/tLdAZCTlcAA/bYXVT8gYCAAJ