.TH "SDL_SetTimer" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" .SH "NAME"SDL_SetTimer\- Set a callback to run after the specified number of milliseconds has elapsed\&..SH "SYNOPSIS".PP\fB#include "SDL\&.h".sp\fBint \fBSDL_SetTimer\fP\fR(\fBUint32 interval, SDL_TimerCallback callback\fR);.SH "CALLBACK".PP/* Function prototype for the timer callback function */ typedef Uint32 (*SDL_TimerCallback)(Uint32 interval);.SH "DESCRIPTION".PPSet 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\&..PPTo cancel a currently running timer, call \fBSDL_SetTimer(0, NULL);\fP.PPThe timer callback function may run in a different thread than your main constant, and so shouldn\&'t call any functions from within itself\&..PPThe 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)\&..PPIf you use this function, you need to pass \fBSDL_INIT_TIMER\fP to \fBSDL_Init()\fP\&..PP.RS\fBNote:  .PPThis function is kept for compatibility but has been superseded by the new timer functions \fISDL_AddTimer\fR and \fISDL_RemoveTimer\fR which support multiple timers\&..RE.SH "EXAMPLES".PP.PP.nf\f(CWSDL_SetTimer((33/10)*10, my_callback);\fR.fi.PP.SH "SEE ALSO".PP\fI\fBSDL_AddTimer\fP\fR...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01