SDL_AddTimer man page on JazzOS

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SDL_AddTimer(3)		       SDL API Reference	       SDL_AddTimer(3)

       SDL_AddTimer  - Add a timer which will call a callback after the speci‐
       fied number of milliseconds has elapsed.

       #include "SDL.h"

       SDL_TimerID SDL_AddTimer(Uint32	interval,  SDL_NewTimerCallback	 call‐
       back, void *param);

       /* type definition for the "new" timer callback function */
       typedef Uint32 (*SDL_NewTimerCallback)(Uint32 interval, void *param);

       Adds  a	callback function to be run after the specified number of mil‐
       liseconds has elapsed. The callback  function  is  passed  the  current
       timer  interval	and  the user supplied parameter from the SDL_AddTimer
       call and returns the next timer interval. If the	 returned  value  from
       the  callback is the same as the one passed in, the periodic alarm con‐
       tinues, otherwise a new alarm is scheduled.

       To cancel a currently running timer call SDL_RemoveTimer with the timer
       ID returned from SDL_AddTimer.

       The  timer  callback  function  may run in a different thread than your
       main program, and so shouldn't call any functions from  within  itself.
       You may always call SDL_PushEvent, however.

       The  granularity	 of  the  timer	 is platform-dependent, but you should
       count on it being at least 10 ms as this is  the	 most  common  number.
       This  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.

       Returns an ID value for the added timer or NULL if there was an error.

       my_timer_id = SDL_AddTimer((33/10)*10, my_callbackfunc, my_callback_param);

       SDL_RemoveTimer, SDL_PushEvent

SDL			    Tue 11 Sep 2001, 23:01	       SDL_AddTimer(3)

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