SDL_GetTicks(3) SDL API Reference SDL_GetTicks(3)NAME
SDL_GetTicks - Get the number of milliseconds since the SDL library initialization.
SYNOPSIS
#include "SDL.h"
Uint32 SDL_GetTicks(void)
DESCRIPTION
Get the number of milliseconds since the SDL library initialization. Note that this value wraps if the program runs for more than ~49 days.
SEE ALSO
SDL_Delay
SDL Tue 11 Sep 2001, 23:01 SDL_GetTicks(3)
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SDL_SetTimer(3) SDL API Reference SDL_SetTimer(3)NAME
SDL_SetTimer- Set a callback to run after the specified number of milliseconds has elapsed.
SYNOPSIS
#include "SDL.h"
int SDL_SetTimer(Uint32 interval, SDL_TimerCallback callback);
CALLBACK
/* Function prototype for the timer callback function */ typedef Uint32 (*SDL_TimerCallback)(Uint32 interval);
DESCRIPTION
Set a callback to run after the specified number of milliseconds has elapsed. The callback function is passed the current timer interval
and returns the next timer interval. If the returned value is the same as the one passed in, the periodic alarm continues, otherwise a new
alarm is scheduled.
To cancel a currently running timer, call SDL_SetTimer(0, NULL);
The timer callback function may run in a different thread than your main constant, and so shouldn't call any functions from within itself.
The maximum resolution of this timer is 10 ms, which means that if you request a 16 ms timer, your callback will run approximately 20 ms
later on an unloaded system. If you wanted to set a flag signaling a frame update at 30 frames per second (every 33 ms), you might set a
timer for 30 ms (see example below).
If you use this function, you need to pass SDL_INIT_TIMER to SDL_Init().
Note:
This function is kept for compatibility but has been superseded by the new timer functions SDL_AddTimer and SDL_RemoveTimer which
support multiple timers.
EXAMPLES
SDL_SetTimer((33/10)*10, my_callback);
SEE ALSO
SDL_AddTimer
SDL Tue 11 Sep 2001, 23:01 SDL_SetTimer(3)
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