test/testtimer.c
author Sam Lantinga <slouken@lokigames.com>
Thu, 26 Apr 2001 16:45:43 +0000
changeset 0 74212992fb08
child 766 ed57c876700d
permissions -rw-r--r--
Initial revision
     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)
    16 {
    17 	++ticks;
    18 	return(interval);
    19 }
    20 
    21 static Uint32 callback(Uint32 interval, void *param)
    22 {
    23   printf("Timer %d : param = %d\n", interval, (int) 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 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 }