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| 1 /* | |
| 2 * Copyright (C) 2007, 2008, 2013 Apple Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer in the | |
| 12 * documentation and/or other materials provided with the distribution. | |
| 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of | |
| 14 * its contributors may be used to endorse or promote products derived | |
| 15 * from this software without specific prior written permission. | |
| 16 * | |
| 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | |
| 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | |
| 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #include "platform/TaskSynchronizer.h" | |
| 30 | |
| 31 #include "platform/heap/SafePoint.h" | |
| 32 #include "platform/heap/ThreadState.h" | |
| 33 | |
| 34 namespace blink { | |
| 35 | |
| 36 TaskSynchronizer::TaskSynchronizer() | |
| 37 : m_taskCompleted(false) | |
| 38 { | |
| 39 } | |
| 40 | |
| 41 void TaskSynchronizer::waitForTaskCompletion() | |
| 42 { | |
| 43 if (ThreadState::current()) { | |
| 44 // Prevent the deadlock between park request by other threads and blocki
ng | |
| 45 // by m_synchronousCondition. | |
| 46 SafePointScope scope(BlinkGC::HeapPointersOnStack); | |
| 47 waitForTaskCompletionInternal(); | |
| 48 } else { | |
| 49 // If this thread is already detached, we no longer need to enter a safe
point scope. | |
| 50 waitForTaskCompletionInternal(); | |
| 51 } | |
| 52 } | |
| 53 | |
| 54 void TaskSynchronizer::waitForTaskCompletionInternal() | |
| 55 { | |
| 56 m_synchronousMutex.lock(); | |
| 57 while (!m_taskCompleted) | |
| 58 m_synchronousCondition.wait(m_synchronousMutex); | |
| 59 m_synchronousMutex.unlock(); | |
| 60 } | |
| 61 | |
| 62 void TaskSynchronizer::taskCompleted() | |
| 63 { | |
| 64 m_synchronousMutex.lock(); | |
| 65 m_taskCompleted = true; | |
| 66 m_synchronousCondition.signal(); | |
| 67 m_synchronousMutex.unlock(); | |
| 68 } | |
| 69 | |
| 70 } // namespace blink | |
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Chromium Code Reviews
Issue 2288983004:
Merge TaskSynchronizer into WaitableEvent. (Closed)
