test/testtimer.c

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