static bool button_try_post(int button, int data)
{
#ifdef HAVE_TOUCHSCREEN
/* one can swipe over the scren very quickly,
* for this to work we want to forget about old presses and
* only respect the very latest ones */
const bool force_post = true;
#else
/* Only post events if the queue is empty,
* to avoid afterscroll effects.
* i.e. don't post new buttons if previous ones haven't been
* processed yet - but always post releases */
const bool force_post = button & BUTTON_REL;
#endif
bool ret = queue_empty(&button_queue);
if (!ret && force_post)
{
queue_remove_from_head(&button_queue, button);
ret = true;
}
if (ret)
queue_post(&button_queue, button, data);
/* on touchscreen we posted unconditionally */
return ret;
}
/* This callback can be used for many different functions if needed -
just check to which object tmo points */
static int btn_detect_callback(struct timeout *tmo)
{
/* Try to post only transistions */
const long id = tmo->data ? SYS_PHONE_PLUGGED : SYS_PHONE_UNPLUGGED;
queue_remove_from_head(&button_queue, id);
queue_post(&button_queue, id, 0);
return 0;
}
/* external interface */
void buttonlight_on(void)
{
queue_remove_from_head(&backlight_queue, BUTTON_LIGHT_ON);
queue_post(&backlight_queue, BUTTON_LIGHT_ON, 0);
}
