timer.h

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/* timer.h  -  Cross-platform timer library  -  Public Domain  -  2011 Mattias Jansson / Rampant Pixels
 *
 * This library provides a cross-platform interface to measure
 * elapsed time with (at least) millisecond accuracy.
 *
 * This library is put in the public domain; you can redistribute
 * it and/or modify it without any restrictions.
 *
 */
 
#pragma once
 
#if TIMER_COMPILE
#define TIMER_API
#else
#if __cplusplus
#define TIMER_API extern "C"
#else
#define TIMER_API extern
#endif
#endif
 
#if defined( _WIN32 ) || defined( _WIN64 )
 
typedef unsigned __int64 tick_t;
 
#else
 
#include <stdint.h>
typedef uint64_t         tick_t;
 
#endif
 
//typedef float            deltatime_t;
typedef double           deltatime_t;
 
 
TIMER_API int            timer_lib_initialize( void );
 
TIMER_API void           timer_lib_shutdown( void );
 
TIMER_API tick_t         timer_current( void );
 
TIMER_API deltatime_t    timer_elapsed( const tick_t t );
 
TIMER_API tick_t         timer_elapsed_ticks( const tick_t t );
 
TIMER_API tick_t         timer_ticks_per_second( void );
 
TIMER_API deltatime_t    timer_ticks_to_seconds( const tick_t dt );
 
TIMER_API tick_t         timer_system( void );