static void
run_timers (void)
{
EMACS_TIME now;
EMACS_GET_TIME (now);
while (atimers
&& (pending_atimers = interrupt_input_blocked) == 0
&& EMACS_TIME_LE (atimers->expiration, now))
{
struct atimer *t;
t = atimers;
atimers = atimers->next;
#ifndef DARWIN_OS
t->fn (t);
#endif
if (t->type == ATIMER_CONTINUOUS)
{
EMACS_ADD_TIME (t->expiration, now, t->interval);
schedule_atimer (t);
}
else
{
t->next = free_atimers;
free_atimers = t;
}
#ifdef DARWIN_OS
/* Fix for Ctrl-G. Perhaps this should apply to all platforms. */
t->fn (t);
#endif
EMACS_GET_TIME (now);
}
if (! atimers)
pending_atimers = 0;
#ifdef SYNC_INPUT
if (pending_atimers)
pending_signals = 1;
else
{
pending_signals = interrupt_input_pending;
set_alarm ();
}
#else
if (! pending_atimers)
set_alarm ();
#endif
}
static void
set_alarm (void)
{
if (atimers)
{
EMACS_TIME now, timestamp;
#ifdef HAVE_SETITIMER
struct itimerval it;
#endif
/* Determine s/us till the next timer is ripe. */
EMACS_GET_TIME (now);
EMACS_SUB_TIME (timestamp, atimers->expiration, now);
#ifdef HAVE_SETITIMER
/* Don't set the interval to 0; this disables the timer. */
if (EMACS_TIME_LE (atimers->expiration, now))
{
EMACS_SET_SECS (timestamp, 0);
EMACS_SET_USECS (timestamp, 1000);
}
memset (&it, 0, sizeof it);
it.it_value = timestamp;
setitimer (ITIMER_REAL, &it, 0);
#else /* not HAVE_SETITIMER */
alarm (max (EMACS_SECS (timestamp), 1));
#endif /* not HAVE_SETITIMER */
}
}
char *
get_time ()
{
if (watch_not_started)
exit (EXIT_FAILURE); /* call reset_watch first ! */
EMACS_GET_TIME (TV2);
EMACS_SUB_TIME (TV2, TV2, TV1);
sprintf (time_string, "%lu.%06lu", (unsigned long)EMACS_SECS (TV2), (unsigned long)EMACS_USECS (TV2));
return time_string;
}
static int
emacs_tty_event_pending_p (int user_p)
{
if (!user_p)
{
EMACS_TIME sometime;
/* see if there's a pending timeout. */
EMACS_GET_TIME (sometime);
if (tty_timer_queue &&
EMACS_TIME_EQUAL_OR_GREATER (sometime, tty_timer_queue->time))
return 1;
}
return poll_fds_for_input (user_p ? tty_only_mask :
non_fake_input_wait_mask);
}
static char *get_time(void)
{
int sz;
if (watch_not_started)
exit(1); /* call reset_watch first ! */
EMACS_GET_TIME(TV2);
if (TV1.tv_usec > TV2.tv_usec) {
TV2.tv_usec += 1000000;
TV2.tv_sec--;
}
sz = snprintf(time_string, sizeof(time_string), "%lu.%06lu",
(unsigned long)TV2.tv_sec - TV1.tv_sec,
(unsigned long)TV2.tv_usec - TV1.tv_usec);
assert(sz >= 0 && (size_t)sz < sizeof(time_string));
return time_string;
}
struct atimer *
start_atimer (enum atimer_type type, EMACS_TIME timestamp, atimer_callback fn,
void *client_data)
{
struct atimer *t;
/* Round TIME up to the next full second if we don't have
itimers. */
#ifndef HAVE_SETITIMER
if (EMACS_USECS (timestamp) != 0)
{
EMACS_SET_USECS (timestamp, 0);
EMACS_SET_SECS (timestamp, EMACS_SECS (timestamp) + 1);
}
#endif /* not HAVE_SETITIMER */
/* Get an atimer structure from the free-list, or allocate
a new one. */
if (free_atimers)
{
t = free_atimers;
free_atimers = t->next;
}
else
t = (struct atimer *) xmalloc (sizeof *t);
/* Fill the atimer structure. */
memset (t, 0, sizeof *t);
t->type = type;
t->fn = fn;
t->client_data = client_data;
BLOCK_ATIMERS;
/* Compute the timer's expiration time. */
switch (type)
{
case ATIMER_ABSOLUTE:
t->expiration = timestamp;
break;
case ATIMER_RELATIVE:
EMACS_GET_TIME (t->expiration);
EMACS_ADD_TIME (t->expiration, t->expiration, timestamp);
break;
case ATIMER_CONTINUOUS:
EMACS_GET_TIME (t->expiration);
EMACS_ADD_TIME (t->expiration, t->expiration, timestamp);
t->interval = timestamp;
break;
}
/* Insert the timer in the list of active atimers. */
schedule_atimer (t);
UNBLOCK_ATIMERS;
/* Arrange for a SIGALRM at the time the next atimer is ripe. */
set_alarm ();
return t;
}
static void reset_watch(void)
{
EMACS_GET_TIME(TV1);
watch_not_started = 0;
}