1 /* 2 * Copyright (C) 2008 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 #ifndef TimeoutChecker_h 30 #define TimeoutChecker_h 31 32 #include <wtf/Assertions.h> 33 34 namespace JSC { 35 36 class ExecState; 37 38 class TimeoutChecker { 39 public: 40 TimeoutChecker(); 41 setTimeoutInterval(unsigned timeoutInterval)42 void setTimeoutInterval(unsigned timeoutInterval) { m_timeoutInterval = timeoutInterval; } timeoutInterval()43 unsigned timeoutInterval() const { return m_timeoutInterval; } 44 ticksUntilNextCheck()45 unsigned ticksUntilNextCheck() { return m_ticksUntilNextCheck; } 46 start()47 void start() 48 { 49 if (!m_startCount) 50 reset(); 51 ++m_startCount; 52 } 53 stop()54 void stop() 55 { 56 ASSERT(m_startCount); 57 --m_startCount; 58 } 59 60 void reset(); 61 62 bool didTimeOut(ExecState*); 63 64 private: 65 unsigned m_timeoutInterval; 66 unsigned m_timeAtLastCheck; 67 unsigned m_timeExecuting; 68 unsigned m_startCount; 69 unsigned m_ticksUntilNextCheck; 70 }; 71 72 } // namespace JSC 73 74 #endif // TimeoutChecker_h 75