test/testtimer.c
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FUNCTIONS
This source file includes following functions.
- ticktock
- callback
- main
1
2 /* Test program to check the resolution of the SDL timer on the current
3 platform
4 */
5
6 #include <stdlib.h>
7 #include <stdio.h>
8
9 #include "SDL.h"
10
11 #define DEFAULT_RESOLUTION 1
12
13 static int ticks = 0;
14
15 static Uint32 ticktock(Uint32 interval)
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16 {
17 ++ticks;
18 return(interval);
19 }
20
21 static Uint32 callback(Uint32 interval, void *param)
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22 {
23 printf("Timer %d : param = %d\n", interval, (int) param);
24 return interval;
25 }
26
27 int main(int argc, char *argv[])
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28 {
29 int desired;
30 SDL_TimerID t1, t2, t3;
31
32 if ( SDL_Init(SDL_INIT_TIMER) < 0 ) {
33 fprintf(stderr, "Couldn't load SDL: %s\n", SDL_GetError());
34 exit(1);
35 }
36 atexit(SDL_Quit);
37
38 /* Start the timer */
39 desired = 0;
40 if ( argv[1] ) {
41 desired = atoi(argv[1]);
42 }
43 if ( desired == 0 ) {
44 desired = DEFAULT_RESOLUTION;
45 }
46 SDL_SetTimer(desired, ticktock);
47
48 /* Wait 10 seconds */
49 printf("Waiting 10 seconds\n");
50 SDL_Delay(10*1000);
51
52 /* Stop the timer */
53 SDL_SetTimer(0, NULL);
54
55 /* Print the results */
56 if ( ticks ) {
57 fprintf(stderr,
58 "Timer resolution: desired = %d ms, actual = %f ms\n",
59 desired, (double)(10*1000)/ticks);
60 }
61
62 /* Test multiple timers */
63 printf("Testing multiple timers...\n");
64 t1 = SDL_AddTimer(100, callback, (void*)1);
65 if(!t1)
66 fprintf(stderr,"Could not create timer 1\n");
67 t2 = SDL_AddTimer(50, callback, (void*)2);
68 if(!t2)
69 fprintf(stderr,"Could not create timer 2\n");
70 t3 = SDL_AddTimer(233, callback, (void*)3);
71 if(!t3)
72 fprintf(stderr,"Could not create timer 3\n");
73
74 /* Wait 10 seconds */
75 printf("Waiting 10 seconds\n");
76 SDL_Delay(10*1000);
77
78 printf("Removing timer 1 and waiting 5 more seconds\n");
79 SDL_RemoveTimer(t1);
80
81 SDL_Delay(5*1000);
82
83 SDL_RemoveTimer(t2);
84 SDL_RemoveTimer(t3);
85
86 return(0);
87 }