1db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block/* 22fc2651226baac27029e38c9d6ef883fa32084dbSteve Block * Copyright (C) 2011 Apple Inc. All rights reserved. 3db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * 4db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * Redistribution and use in source and binary forms, with or without 5db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * modification, are permitted provided that the following conditions 6db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * are met: 7db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * 1. Redistributions of source code must retain the above copyright 8db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * notice, this list of conditions and the following disclaimer. 9db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * 2. Redistributions in binary form must reproduce the above copyright 10db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * notice, this list of conditions and the following disclaimer in the 11db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * documentation and/or other materials provided with the distribution. 12db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * 13db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block * THE POSSIBILITY OF SUCH DAMAGE. 24db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block */ 25db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block 262fc2651226baac27029e38c9d6ef883fa32084dbSteve Block#include "config.h" 272fc2651226baac27029e38c9d6ef883fa32084dbSteve Block#include "BinarySemaphore.h" 28dd8bb3de4f353a81954234999f1fea748aee2ea9Ben Murdoch 292fc2651226baac27029e38c9d6ef883fa32084dbSteve Blocknamespace CoreIPC { 3065f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 312fc2651226baac27029e38c9d6ef883fa32084dbSteve BlockBinarySemaphore::BinarySemaphore() 322fc2651226baac27029e38c9d6ef883fa32084dbSteve Block : m_event(::CreateEventW(0, FALSE, FALSE, 0)) 332fc2651226baac27029e38c9d6ef883fa32084dbSteve Block{ 342fc2651226baac27029e38c9d6ef883fa32084dbSteve Block} 352fc2651226baac27029e38c9d6ef883fa32084dbSteve Block 362fc2651226baac27029e38c9d6ef883fa32084dbSteve BlockBinarySemaphore::~BinarySemaphore() 372fc2651226baac27029e38c9d6ef883fa32084dbSteve Block{ 382fc2651226baac27029e38c9d6ef883fa32084dbSteve Block ::CloseHandle(m_event); 392fc2651226baac27029e38c9d6ef883fa32084dbSteve Block} 4065f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 412fc2651226baac27029e38c9d6ef883fa32084dbSteve Blockvoid BinarySemaphore::signal() 4265f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch{ 432fc2651226baac27029e38c9d6ef883fa32084dbSteve Block ::SetEvent(m_event); 442fc2651226baac27029e38c9d6ef883fa32084dbSteve Block} 452fc2651226baac27029e38c9d6ef883fa32084dbSteve Block 462fc2651226baac27029e38c9d6ef883fa32084dbSteve Blockbool BinarySemaphore::wait(double absoluteTime) 472fc2651226baac27029e38c9d6ef883fa32084dbSteve Block{ 482fc2651226baac27029e38c9d6ef883fa32084dbSteve Block DWORD interval = absoluteTimeToWaitTimeoutInterval(absoluteTime); 492fc2651226baac27029e38c9d6ef883fa32084dbSteve Block if (!interval) { 502fc2651226baac27029e38c9d6ef883fa32084dbSteve Block // Consider the wait to have timed out, even if the event has already been signaled, to 512fc2651226baac27029e38c9d6ef883fa32084dbSteve Block // match the WTF::ThreadCondition implementation. 522fc2651226baac27029e38c9d6ef883fa32084dbSteve Block return false; 532fc2651226baac27029e38c9d6ef883fa32084dbSteve Block } 542fc2651226baac27029e38c9d6ef883fa32084dbSteve Block 552fc2651226baac27029e38c9d6ef883fa32084dbSteve Block DWORD result = ::WaitForSingleObjectEx(m_event, interval, FALSE); 562fc2651226baac27029e38c9d6ef883fa32084dbSteve Block switch (result) { 572fc2651226baac27029e38c9d6ef883fa32084dbSteve Block case WAIT_OBJECT_0: 582fc2651226baac27029e38c9d6ef883fa32084dbSteve Block // The event was signaled. 592fc2651226baac27029e38c9d6ef883fa32084dbSteve Block return true; 602fc2651226baac27029e38c9d6ef883fa32084dbSteve Block 612fc2651226baac27029e38c9d6ef883fa32084dbSteve Block case WAIT_TIMEOUT: 622fc2651226baac27029e38c9d6ef883fa32084dbSteve Block // The wait timed out. 632fc2651226baac27029e38c9d6ef883fa32084dbSteve Block return false; 6465f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 652fc2651226baac27029e38c9d6ef883fa32084dbSteve Block case WAIT_FAILED: 662fc2651226baac27029e38c9d6ef883fa32084dbSteve Block ASSERT_WITH_MESSAGE(false, "::WaitForSingleObjectEx failed with error %lu", ::GetLastError()); 672fc2651226baac27029e38c9d6ef883fa32084dbSteve Block return false; 682fc2651226baac27029e38c9d6ef883fa32084dbSteve Block default: 692fc2651226baac27029e38c9d6ef883fa32084dbSteve Block ASSERT_WITH_MESSAGE(false, "::WaitForSingleObjectEx returned unexpected result %lu", result); 702fc2651226baac27029e38c9d6ef883fa32084dbSteve Block return false; 712fc2651226baac27029e38c9d6ef883fa32084dbSteve Block } 72dd8bb3de4f353a81954234999f1fea748aee2ea9Ben Murdoch} 73db14019a23d96bc8a444b6576a5da8bd1cfbc8b0Steve Block 742fc2651226baac27029e38c9d6ef883fa32084dbSteve Block} // namespace CoreIPC 75