/*
* Main loop
*/
void
game_run(void)
{
U32 tm, tmx;
loaddata(); /* load cached data */
game_period = sysarg_args_period ? sysarg_args_period : GAME_PERIOD;
tm = sys_gettime();
game_state = XRICK;
/* main loop */
while (game_state != EXIT) {
/* timer */
tmx = tm; tm = sys_gettime(); tmx = tm - tmx;
if (tmx < game_period) sys_sleep(game_period - tmx);
/* video */
/*DEBUG*//*game_rects=&draw_SCREENRECT;*//*DEBUG*/
sysvid_update(game_rects);
draw_STATUSRECT.next = NULL; /* FIXME freerects should handle this */
/* sound */
/*snd_mix();*/
/* events */
if (game_waitevt)
sysevt_wait(); /* wait for an event */
else
sysevt_poll(); /* process events (non-blocking) */
/* frame */
frame();
}
freedata(); /* free cached data */
}
/*
* Main loop
*/
void
game_run(void)
{
U32 tm;
#if 0
U32 tmx;
#endif
loaddata(); /* load cached data */
game_period = sysarg_args_period ? sysarg_args_period : GAME_PERIOD;
tm = sys_gettime();
game_state = XRICK;
/* main loop */
while (game_state != EXIT) {
#if 0
/* This code doesn't make any sense to me at all. It waits
until the desired amount of time has passed and then
takes the time at which it started waiting (which is
not synchronous with anything) as the reference point
for the next frame. This sort of works if your system
takes very little time to compute the frame, but fails
horribly otherwise, e.g. if you use blocking I/O
(sound, vblank). */
tmx = tm; tm = sys_gettime(); tmx = tm - tmx;
if (tmx < game_period) sys_sleep(game_period - tmx);
#endif
/* video */
/*DEBUG*//*game_rects=&draw_SCREENRECT;*//*DEBUG*/
sysvid_update(game_rects);
draw_STATUSRECT.next = NULL; /* FIXME freerects should handle this */
/* timer */
/* Reset the timing if it's way out of line, such as when
the game thread has been paused. */
if (sys_gettime() - tm > game_period * 10)
tm = sys_gettime() - game_period / 2;
/* Update sound while waiting. */
do {
syssnd_callback();
} while (sys_gettime() - tm < game_period / 2);
/* Use the time at which the frame should have been complete as
reference for the next frame. This makes it possible to
"catch up" if a frame has taken longer for some reason. */
tm = tm + game_period / 2;
/* sound */
/*snd_mix();*/
/* events */
if (game_waitevt)
sysevt_wait(); /* wait for an event */
else
sysevt_poll(); /* process events (non-blocking) */
/* frame */
frame();
}
freedata(); /* free cached data */
}
