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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file contains the declarations of Timer related classes
#ifndef O3D_CORE_CROSS_TIMER_H_
#define O3D_CORE_CROSS_TIMER_H_
#include <build/build_config.h>
#ifdef OS_MACOSX
#include <Carbon/Carbon.h>
#endif
#include "core/cross/types.h"
namespace o3d {
class ElapsedTimeTimer {
public:
ElapsedTimeTimer();
// Gets the elapsed time in seconds since the last time the timer was reset,
// then reset the stored time to restart the interval.
float GetElapsedTimeAndReset();
// Gets the elapsed time in seconds since the last time the timer was reset,
// but doesn't reset the stored time. Use this to keep track of cumulative
// time rather than each interval.
float GetElapsedTimeWithoutClearing();
private:
float GetElapsedTimeHelper(bool reset);
#ifdef OS_MACOSX
typedef AbsoluteTime TimeStamp;
#endif
#ifdef OS_LINUX
typedef uint64_t TimeStamp;
#endif
#ifdef OS_WIN
typedef LARGE_INTEGER TimeStamp;
#endif
#ifdef OS_WIN
// The frequency of the windows performance counter in ticks per second.
TimeStamp windows_timer_frequency_;
#endif
// The value of the tick count from the windows performance counter from the
// last time GetElapsedTime was called.
TimeStamp last_time_;
};
} // namespace o3d
#endif // O3D_CORE_CROSS_TIMER_H_
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