Devin J. Pohly
81 lines
3.2 KiB
C++
81 lines
3.2 KiB
C++
/* RageTimer - Timer services. */
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#ifndef RAGE_TIMER_H
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#define RAGE_TIMER_H
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class RageTimer
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{
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public:
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RageTimer() { Touch(); }
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RageTimer( int secs, int us ): m_secs(secs), m_us(us) { }
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/* Time ago this RageTimer represents. */
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float Ago() const;
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void Touch();
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inline bool IsZero() const { return m_secs == 0 && m_us == 0; }
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inline void SetZero() { m_secs = m_us = 0; }
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/* Time between last call to GetDeltaTime() (Ago() + Touch()): */
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float GetDeltaTime();
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/* (alias) */
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float PeekDeltaTime() const { return Ago(); }
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/* deprecated: */
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static float GetTimeSinceStart( bool bAccurate = true ); // seconds since the program was started
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static float GetTimeSinceStartFast() { return GetTimeSinceStart(false); }
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/* Get a timer representing half of the time ago as this one. */
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RageTimer Half() const;
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/* Add (or subtract) a duration from a timestamp. The result is another timestamp. */
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RageTimer operator+( float tm ) const;
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RageTimer operator-( float tm ) const { return *this + -tm; }
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void operator+=( float tm ) { *this = *this + tm; }
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void operator-=( float tm ) { *this = *this + -tm; }
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/* Find the amount of time between two timestamps. The result is a duration. */
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float operator-( const RageTimer &rhs ) const;
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bool operator<( const RageTimer &rhs ) const;
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/* "float" is bad for a "time since start" RageTimer. If the game is running for
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* several days, we'll lose a lot of resolution. I don't want to use double
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* everywhere, since it's slow. I'd rather not use double just for RageTimers, since
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* it's too easy to get a type wrong and end up with obscure resolution problems. */
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unsigned m_secs, m_us;
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private:
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static RageTimer Sum( const RageTimer &lhs, float tm );
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static float Difference( const RageTimer &lhs, const RageTimer &rhs );
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};
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extern const RageTimer RageZeroTimer;
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#endif
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/*
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* Copyright (c) 2001-2003 Chris Danford, Glenn Maynard
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, and/or sell copies of the Software, and to permit persons to
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* whom the Software is furnished to do so, provided that the above
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* copyright notice(s) and this permission notice appear in all copies of
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* the Software and that both the above copyright notice(s) and this
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* permission notice appear in supporting documentation.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
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* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
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* INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
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* OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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