/* 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 SDLCALL
ticktock (Uint32 interval)
{
    ++ticks;
    return (interval);
}

static Uint32 SDLCALL
callback (Uint32 interval, void *param)
{
    printf ("Timer %d : param = %d\n", interval, (int) (uintptr_t) 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 initialize SDL: %s\n", SDL_GetError ());
        return (1);
    }

    /* 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: %s\n", SDL_GetError ());
    t2 = SDL_AddTimer (50, callback, (void *) 2);
    if (!t2)
        fprintf (stderr, "Could not create timer 2: %s\n", SDL_GetError ());
    t3 = SDL_AddTimer (233, callback, (void *) 3);
    if (!t3)
        fprintf (stderr, "Could not create timer 3: %s\n", SDL_GetError ());

    /* 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);

    SDL_Quit ();
    return (0);
}