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64 lines
2.1 KiB
C++
64 lines
2.1 KiB
C++
/*
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* Copyright (C) 2011 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKY_ENGINE_PLATFORM_CLOCK_H_
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#define SKY_ENGINE_PLATFORM_CLOCK_H_
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#include "sky/engine/platform/PlatformExport.h"
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#include "sky/engine/wtf/PassOwnPtr.h"
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#include "sky/engine/wtf/RefCounted.h"
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namespace blink {
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class PLATFORM_EXPORT Clock {
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public:
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static PassOwnPtr<Clock> create();
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void setCurrentTime(double);
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double currentTime() const;
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void setPlayRate(double);
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double playRate() const { return m_rate; }
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void start();
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void stop();
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bool isRunning() const { return m_running; }
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private:
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Clock();
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double now() const;
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double currentDelta() const;
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bool m_running;
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double m_rate;
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double m_offset;
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double m_startTime;
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mutable double m_lastTime;
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};
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}
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#endif // SKY_ENGINE_PLATFORM_CLOCK_H_
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