/
testtimer.c
87 lines (68 loc) · 1.66 KB
/
testtimer.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
/* Test program to check the resolution of the SDL timer on the current
platform
*/
#include <stdlib.h>
#include <stdio.h>
#include "SDL.h"
#define DEFAULT_RESOLUTION 1
static int ticks = 0;
static Uint32 ticktock(Uint32 interval)
{
++ticks;
return(interval);
}
static Uint32 callback(Uint32 interval, void *param)
{
printf("Timer %d : param = %d\n", interval, (int) param);
return interval;
}
int main(int argc, char *argv[])
{
int desired;
SDL_TimerID t1, t2, t3;
if ( SDL_Init(SDL_INIT_TIMER) < 0 ) {
fprintf(stderr, "Couldn't load SDL: %s\n", SDL_GetError());
exit(1);
}
atexit(SDL_Quit);
/* Start the timer */
desired = 0;
if ( argv[1] ) {
desired = atoi(argv[1]);
}
if ( desired == 0 ) {
desired = DEFAULT_RESOLUTION;
}
SDL_SetTimer(desired, ticktock);
/* Wait 10 seconds */
printf("Waiting 10 seconds\n");
SDL_Delay(10*1000);
/* Stop the timer */
SDL_SetTimer(0, NULL);
/* Print the results */
if ( ticks ) {
fprintf(stderr,
"Timer resolution: desired = %d ms, actual = %f ms\n",
desired, (double)(10*1000)/ticks);
}
/* Test multiple timers */
printf("Testing multiple timers...\n");
t1 = SDL_AddTimer(100, callback, (void*)1);
if(!t1)
fprintf(stderr,"Could not create timer 1\n");
t2 = SDL_AddTimer(50, callback, (void*)2);
if(!t2)
fprintf(stderr,"Could not create timer 2\n");
t3 = SDL_AddTimer(233, callback, (void*)3);
if(!t3)
fprintf(stderr,"Could not create timer 3\n");
/* Wait 10 seconds */
printf("Waiting 10 seconds\n");
SDL_Delay(10*1000);
printf("Removing timer 1 and waiting 5 more seconds\n");
SDL_RemoveTimer(t1);
SDL_Delay(5*1000);
SDL_RemoveTimer(t2);
SDL_RemoveTimer(t3);
return(0);
}