Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_SetTimer.3 @ 939:c7c04f811994
Date: Tue, 01 Jun 2004 15:27:44 +0300
From: Martin_Storsj
Subject: Update for dynamic loading of ALSA
I sent you a patch a few months ago which enables SDL to load ALSA
dynamically. Now I've finally got time to tweak this yet some more. I've
added code from alsa.m4 (from alsa's dev package) to acinclude.m4, and
made the detection of the alsa library name a bit better. I've also
fixed up the loading versioned symbols with dlvsym, so that it falls
back to dlsym.
I wouldn't say the configure script is complete yet, but this is how far
I've come this time, and I'm no expert at those things.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 21 Aug 2004 04:20:00 +0000 |
| parents | e5bc29de3f0a |
| children | 546f7c1eb755 |
| rev | line source |
|---|---|
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1 .TH "SDL_SetTimer" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" |
| 0 | 2 .SH "NAME" |
| 3 SDL_SetTimer\- Set a callback to run after the specified number of milliseconds has elapsed\&. | |
| 4 .SH "SYNOPSIS" | |
| 5 .PP | |
| 6 \fB#include "SDL\&.h" | |
| 7 .sp | |
| 8 \fBint \fBSDL_SetTimer\fP\fR(\fBUint32 interval, SDL_TimerCallback callback\fR); | |
| 9 .SH "CALLBACK" | |
| 10 .PP | |
| 11 /* Function prototype for the timer callback function */ typedef Uint32 (*SDL_TimerCallback)(Uint32 interval); | |
| 12 .SH "DESCRIPTION" | |
| 13 .PP | |
| 14 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\&. | |
| 15 .PP | |
| 16 To cancel a currently running timer, call \fBSDL_SetTimer(0, NULL);\fP | |
| 17 .PP | |
| 18 The timer callback function may run in a different thread than your main constant, and so shouldn\&'t call any functions from within itself\&. | |
| 19 .PP | |
| 20 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)\&. | |
| 21 .PP | |
| 22 If you use this function, you need to pass \fBSDL_INIT_TIMER\fP to \fBSDL_Init()\fP\&. | |
| 23 .PP | |
| 24 .RS | |
| 25 \fBNote: | |
| 26 .PP | |
|
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Sam Lantinga <slouken@lokigames.com>
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27 This 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\&. |
| 0 | 28 .RE |
| 29 .SH "EXAMPLES" | |
| 30 .PP | |
| 31 .PP | |
| 32 .nf | |
| 33 \f(CWSDL_SetTimer((33/10)*10, my_callback);\fR | |
| 34 .fi | |
| 35 .PP | |
| 36 .SH "SEE ALSO" | |
| 37 .PP | |
| 38 \fI\fBSDL_AddTimer\fP\fR | |
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181
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Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
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39 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01 |