test/testtimer.c
author Sam Lantinga <slouken@libsdl.org>
Mon, 10 Jul 2006 21:04:37 +0000
changeset 1895 c121d94672cb
parent 1769 290b5baf2fca
child 5514 6bd701987ba9
permissions -rw-r--r--
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
     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
    16 ticktock(Uint32 interval)
    17 {
    18     ++ticks;
    19     return (interval);
    20 }
    21 
    22 static Uint32 SDLCALL
    23 callback(Uint32 interval, void *param)
    24 {
    25     printf("Timer %d : param = %d\n", interval, (int) (uintptr_t) param);
    26     return interval;
    27 }
    28 
    29 int
    30 main(int argc, char *argv[])
    31 {
    32     int desired;
    33     SDL_TimerID t1, t2, t3;
    34 
    35     if (SDL_Init(SDL_INIT_TIMER) < 0) {
    36         fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
    37         return (1);
    38     }
    39 
    40     /* Start the timer */
    41     desired = 0;
    42     if (argv[1]) {
    43         desired = atoi(argv[1]);
    44     }
    45     if (desired == 0) {
    46         desired = DEFAULT_RESOLUTION;
    47     }
    48     SDL_SetTimer(desired, ticktock);
    49 
    50     /* Wait 10 seconds */
    51     printf("Waiting 10 seconds\n");
    52     SDL_Delay(10 * 1000);
    53 
    54     /* Stop the timer */
    55     SDL_SetTimer(0, NULL);
    56 
    57     /* Print the results */
    58     if (ticks) {
    59         fprintf(stderr,
    60                 "Timer resolution: desired = %d ms, actual = %f ms\n",
    61                 desired, (double) (10 * 1000) / ticks);
    62     }
    63 
    64     /* Test multiple timers */
    65     printf("Testing multiple timers...\n");
    66     t1 = SDL_AddTimer(100, callback, (void *) 1);
    67     if (!t1)
    68         fprintf(stderr, "Could not create timer 1: %s\n", SDL_GetError());
    69     t2 = SDL_AddTimer(50, callback, (void *) 2);
    70     if (!t2)
    71         fprintf(stderr, "Could not create timer 2: %s\n", SDL_GetError());
    72     t3 = SDL_AddTimer(233, callback, (void *) 3);
    73     if (!t3)
    74         fprintf(stderr, "Could not create timer 3: %s\n", SDL_GetError());
    75 
    76     /* Wait 10 seconds */
    77     printf("Waiting 10 seconds\n");
    78     SDL_Delay(10 * 1000);
    79 
    80     printf("Removing timer 1 and waiting 5 more seconds\n");
    81     SDL_RemoveTimer(t1);
    82 
    83     SDL_Delay(5 * 1000);
    84 
    85     SDL_RemoveTimer(t2);
    86     SDL_RemoveTimer(t3);
    87 
    88     SDL_Quit();
    89     return (0);
    90 }