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Commit	Line	Data
	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
	42	void setTimeoutInterval(unsigned timeoutInterval) { m_timeoutInterval = timeoutInterval; }
	43	unsigned timeoutInterval() const { return m_timeoutInterval; }
	44
	45	unsigned ticksUntilNextCheck() { return m_ticksUntilNextCheck; }
	46
	47	void start()
	48	{
	49	if (!m_startCount)
	50	reset();
	51	++m_startCount;
	52	}
	53
	54	void stop()
	55	{
	56	ASSERT(m_startCount);
	57	--m_startCount;
	58	}
	59
	60	JS_EXPORT_PRIVATE void reset();
	61
	62	JS_EXPORT_PRIVATE 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