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43 lines
1.1 KiB
C++
43 lines
1.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=4 sw=4 et tw=80:
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef CPOWTIMER_H
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#define CPOWTIMER_H
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#include "prinrval.h"
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class JSObject;
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/**
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* A stopwatch measuring the duration of a CPOW call.
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*
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* As the process is consuming neither user time nor system time
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* during a CPOW call, we measure such durations using wallclock time.
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*
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* This stopwatch is active iff JSRuntime::stopwatch.isActive is set.
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* Upon destruction, update JSRuntime::stopwatch.data.totalCPOWTime.
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*/
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class MOZ_STACK_CLASS CPOWTimer final {
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public:
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explicit inline CPOWTimer(MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM)
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: startInterval(PR_IntervalNow())
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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}
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~CPOWTimer();
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private:
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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/**
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* The instant at which the stopwatch was started.
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*/
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PRIntervalTime startInterval;
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};
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#endif
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