author | martin.trojer@nokia.com |
Fri, 31 Jul 2009 15:01:17 +0100 | |
changeset 1 | 2fb8b9db1c86 |
permissions | -rw-r--r-- |
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2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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.TH "SDL_SetTimer" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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.SH "NAME" |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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SDL_SetTimer \- Set a callback to run after the specified number of milliseconds has elapsed\&. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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.SH "SYNOPSIS" |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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.PP |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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\fB#include "SDL\&.h" |
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.sp |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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\fBint \fBSDL_SetTimer\fP\fR(\fBUint32 interval, SDL_TimerCallback callback\fR); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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.SH "CALLBACK" |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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.PP |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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/* Function prototype for the timer callback function */ typedef Uint32 (*SDL_TimerCallback)(Uint32 interval); |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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.SH "DESCRIPTION" |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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.PP |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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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\&. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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.PP |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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To cancel a currently running timer, call \fBSDL_SetTimer(0, NULL);\fP |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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.PP |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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The timer callback function may run in a different thread than your main constant, and so shouldn\&'t call any functions from within itself\&. |
2fb8b9db1c86
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martin.trojer@nokia.com
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.PP |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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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)\&. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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.PP |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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If you use this function, you need to pass \fBSDL_INIT_TIMER\fP to \fBSDL_Init()\fP\&. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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.PP |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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.RS |
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\fBNote: |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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.PP |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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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\&. |
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.RE |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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.SH "EXAMPLES" |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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.PP |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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.PP |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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.nf |
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\f(CWSDL_SetTimer((33/10)*10, my_callback);\fR |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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.fi |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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.PP |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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.SH "SEE ALSO" |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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.PP |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
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\fI\fBSDL_AddTimer\fP\fR |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01 |