1/* 2 * Copyright (C) 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 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "Watchdog.h" 28 29namespace JSC { 30 31void Watchdog::initTimer() 32{ 33 m_queue = 0; 34 m_timer = 0; 35} 36 37void Watchdog::destroyTimer() 38{ 39 ASSERT(!m_timer); 40 if (m_queue) 41 dispatch_release(m_queue); 42} 43 44void Watchdog::startTimer(double limit) 45{ 46 ASSERT(!m_timer); 47 if (!m_queue) 48 m_queue = dispatch_queue_create("jsc.watchdog.queue", 0); 49 m_timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, m_queue); 50 51 dispatch_source_set_timer(m_timer, 52 dispatch_time(DISPATCH_TIME_NOW, limit * NSEC_PER_SEC), 53 DISPATCH_TIME_FOREVER, 0); 54 55 dispatch_source_set_event_handler(m_timer, ^{ 56 m_timerDidFire = true; 57 }); 58 59 dispatch_resume(m_timer); 60} 61 62void Watchdog::stopTimer() 63{ 64 ASSERT(m_queue); 65 dispatch_sync(m_queue, ^{ 66 dispatch_source_cancel(m_timer); 67 }); 68 dispatch_release(m_timer); 69 m_timer = 0; 70} 71 72} // namespace JSC 73