Mercurial > sdl-ios-xcode
annotate include/SDL_timer.h @ 3950:9d9e15ab1697 SDL-1.2
Check if yasm supports a nasm-specific syntax we use (it doesn't in 0.5.0,
which is still common in Linux distros, and does in 0.6.0). Disable it if we
don't, attempting to fallback to using nasm. Thanks to Mike Frysinger for the
patch.
Fixes Bugzilla #393.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 04 Jun 2007 11:06:48 +0000 |
| parents | c71e05b4dc2e |
| children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1028
diff
changeset
|
3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1028
diff
changeset
|
6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1028
diff
changeset
|
8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1028
diff
changeset
|
13 Lesser General Public License for more details. |
| 0 | 14 |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1028
diff
changeset
|
15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1028
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1028
diff
changeset
|
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
|
251
b8688cfdc232
Updated the headers with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifndef _SDL_timer_h | |
| 24 #define _SDL_timer_h | |
| 25 | |
| 26 /* Header for the SDL time management routines */ | |
| 27 | |
|
1356
67114343400d
*** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
28 #include "SDL_stdinc.h" |
|
1358
c71e05b4dc2e
More header massaging... works great on Windows. ;-)
Sam Lantinga <slouken@libsdl.org>
parents:
1356
diff
changeset
|
29 #include "SDL_error.h" |
| 0 | 30 |
| 31 #include "begin_code.h" | |
| 32 /* Set up for C function definitions, even when using C++ */ | |
| 33 #ifdef __cplusplus | |
| 34 extern "C" { | |
| 35 #endif | |
| 36 | |
| 37 /* This is the OS scheduler timeslice, in milliseconds */ | |
| 38 #define SDL_TIMESLICE 10 | |
| 39 | |
| 40 /* This is the maximum resolution of the SDL timer on all platforms */ | |
| 41 #define TIMER_RESOLUTION 10 /* Experimentally determined */ | |
| 42 | |
| 43 /* Get the number of milliseconds since the SDL library initialization. | |
| 44 * Note that this value wraps if the program runs for more than ~49 days. | |
| 45 */ | |
|
337
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
46 extern DECLSPEC Uint32 SDLCALL SDL_GetTicks(void); |
| 0 | 47 |
| 48 /* Wait a specified number of milliseconds before returning */ | |
|
337
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
49 extern DECLSPEC void SDLCALL SDL_Delay(Uint32 ms); |
| 0 | 50 |
| 51 /* Function prototype for the timer callback function */ | |
|
337
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
52 typedef Uint32 (SDLCALL *SDL_TimerCallback)(Uint32 interval); |
| 0 | 53 |
| 54 /* Set a callback to run after the specified number of milliseconds has | |
| 55 * elapsed. The callback function is passed the current timer interval | |
| 56 * and returns the next timer interval. If the returned value is the | |
| 57 * same as the one passed in, the periodic alarm continues, otherwise a | |
| 58 * new alarm is scheduled. If the callback returns 0, the periodic alarm | |
| 59 * is cancelled. | |
| 60 * | |
| 61 * To cancel a currently running timer, call SDL_SetTimer(0, NULL); | |
| 62 * | |
| 63 * The timer callback function may run in a different thread than your | |
| 64 * main code, and so shouldn't call any functions from within itself. | |
| 65 * | |
| 66 * The maximum resolution of this timer is 10 ms, which means that if | |
| 67 * you request a 16 ms timer, your callback will run approximately 20 ms | |
| 68 * later on an unloaded system. If you wanted to set a flag signaling | |
| 69 * a frame update at 30 frames per second (every 33 ms), you might set a | |
| 70 * timer for 30 ms: | |
| 71 * SDL_SetTimer((33/10)*10, flag_update); | |
| 72 * | |
| 73 * If you use this function, you need to pass SDL_INIT_TIMER to SDL_Init(). | |
| 74 * | |
| 75 * Under UNIX, you should not use raise or use SIGALRM and this function | |
| 76 * in the same program, as it is implemented using setitimer(). You also | |
| 77 * should not use this function in multi-threaded applications as signals | |
| 78 * to multi-threaded apps have undefined behavior in some implementations. | |
|
1028
5ba65305c954
Fix various problems with the timer code.
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
79 * |
|
5ba65305c954
Fix various problems with the timer code.
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
80 * This function returns 0 if successful, or -1 if there was an error. |
| 0 | 81 */ |
|
337
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
82 extern DECLSPEC int SDLCALL SDL_SetTimer(Uint32 interval, SDL_TimerCallback callback); |
| 0 | 83 |
| 84 /* New timer API, supports multiple timers | |
| 85 * Written by Stephane Peter <megastep@lokigames.com> | |
| 86 */ | |
| 87 | |
| 88 /* Function prototype for the new timer callback function. | |
| 89 * The callback function is passed the current timer interval and returns | |
| 90 * the next timer interval. If the returned value is the same as the one | |
| 91 * passed in, the periodic alarm continues, otherwise a new alarm is | |
| 92 * scheduled. If the callback returns 0, the periodic alarm is cancelled. | |
| 93 */ | |
|
337
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
94 typedef Uint32 (SDLCALL *SDL_NewTimerCallback)(Uint32 interval, void *param); |
| 0 | 95 |
| 96 /* Definition of the timer ID type */ | |
| 97 typedef struct _SDL_TimerID *SDL_TimerID; | |
| 98 | |
| 99 /* Add a new timer to the pool of timers already running. | |
| 100 Returns a timer ID, or NULL when an error occurs. | |
| 101 */ | |
|
337
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
102 extern DECLSPEC SDL_TimerID SDLCALL SDL_AddTimer(Uint32 interval, SDL_NewTimerCallback callback, void *param); |
| 0 | 103 |
| 104 /* Remove one of the multiple timers knowing its ID. | |
| 105 * Returns a boolean value indicating success. | |
| 106 */ | |
|
337
9154ec9ca3d2
Explicitly specify the SDL API calling convention (C by default)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
107 extern DECLSPEC SDL_bool SDLCALL SDL_RemoveTimer(SDL_TimerID t); |
| 0 | 108 |
| 109 /* Ends C function definitions when using C++ */ | |
| 110 #ifdef __cplusplus | |
| 111 } | |
| 112 #endif | |
| 113 #include "close_code.h" | |
| 114 | |
| 115 #endif /* _SDL_timer_h */ |