Mercurial > sdl-ios-xcode
view docs/html/sdlsettimer.html @ 1062:3e637850c02b
Date: Tue, 22 Mar 2005 23:50:20 +0100
From: Johannes Schmidt
Subject: [PATCH] Re: [SDL] SDL 1.2.8 Prerelease
On Saturday 18 December 2004 13:59, Stephane Marchesin wrote:
> >#error "The kernel sources in /usr/src/linux are not yet configured."
> >#error "Please run 'make cloneconfig && make dep' in /usr/src/linux/"
> >#error "to get a kernel that is configured like the running kernel."
> >#error "Alternatively, you can copy one of the config files"
> >#error "arch/$ARCH/defconfig.* to .config, and run"
> >#error "'make oldconfig && make dep' to configure the kernel"
> >#error "for that configuration."
> >-
>
> That's the Suse kernel sources...
> I think the only way out is to add a test in ./configure
Attached is a patch (it works for me[TM]) which adds a CheckLinuxVersion() to
configure.in and a check for HAVE_LINUX_VERSION_H to
src/cdrom/linux/SDL_syscdrom.c.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Fri, 20 May 2005 07:34:34 +0000 |
parents | 355632dca928 |
children |
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<HTML ><HEAD ><TITLE >SDL_SetTimer</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="SDL Library Documentation" HREF="index.html"><LINK REL="UP" TITLE="Time" HREF="time.html"><LINK REL="PREVIOUS" TITLE="SDL_RemoveTimer" HREF="sdlremovetimer.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFF8DC" TEXT="#000000" LINK="#0000ee" VLINK="#551a8b" ALINK="#ff0000" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >SDL Library Documentation</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="sdlremovetimer.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" > </TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SDLSETTIMER" ></A >SDL_SetTimer</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN8557" ></A ><H2 >Name</H2 >SDL_SetTimer -- Set a callback to run after the specified number of milliseconds has elapsed.</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN8560" ></A ><H2 >Synopsis</H2 ><DIV CLASS="FUNCSYNOPSIS" ><A NAME="AEN8561" ></A ><P ></P ><PRE CLASS="FUNCSYNOPSISINFO" >#include "SDL.h"</PRE ><P ><CODE ><CODE CLASS="FUNCDEF" >int <B CLASS="FSFUNC" >SDL_SetTimer</B ></CODE >(Uint32 interval, SDL_TimerCallback callback);</CODE ></P ><P ></P ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="SDLTIMERCALLBACK" ></A ><H2 >Callback</H2 ><P >/* Function prototype for the timer callback function */ typedef Uint32 (*SDL_TimerCallback)(Uint32 interval);</P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN8570" ></A ><H2 >Description</H2 ><P >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.</P ><P >To cancel a currently running timer, call <TT CLASS="FUNCTION" >SDL_SetTimer(0, NULL);</TT ></P ><P >The timer callback function may run in a different thread than your main constant, and so shouldn't call any functions from within itself.</P ><P >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).</P ><P >If you use this function, you need to pass <TT CLASS="LITERAL" >SDL_INIT_TIMER</TT > to <TT CLASS="FUNCTION" >SDL_Init()</TT >.</P ><DIV CLASS="NOTE" ><BLOCKQUOTE CLASS="NOTE" ><P ><B >Note: </B >This function is kept for compatibility but has been superseded by the new timer functions <A HREF="sdladdtimer.html" >SDL_AddTimer</A > and <A HREF="sdlremovetimer.html" >SDL_RemoveTimer</A > which support multiple timers.</P ></BLOCKQUOTE ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN8584" ></A ><H2 >Examples</H2 ><P ><PRE CLASS="PROGRAMLISTING" >SDL_SetTimer((33/10)*10, my_callback);</PRE ></P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN8588" ></A ><H2 >See Also</H2 ><P ><A HREF="sdladdtimer.html" ><TT CLASS="FUNCTION" >SDL_AddTimer</TT ></A ></P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="sdlremovetimer.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" > </TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SDL_RemoveTimer</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="time.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" > </TD ></TR ></TABLE ></DIV ></BODY ></HTML >