/* Asynchronous timers.
- Copyright (C) 2000, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005,
+ 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
This file is part of GNU Emacs.
-GNU Emacs is free software; you can redistribute it and/or modify
+GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <signal.h>
#include <stdio.h>
+#include <setjmp.h>
#include <lisp.h>
#include <syssignal.h>
#include <systime.h>
struct atimer *p, *prev;
/* See if T is active. */
- for (p = atimers, prev = 0; p && p != t; p = p->next)
+ for (p = atimers, prev = NULL; p && p != t; prev = p, p = p->next)
;
if (p == t)
static void
set_alarm ()
{
-#if defined (USG) && !defined (POSIX_SIGNALS)
- /* USG systems forget handlers when they are used;
- must reestablish each time. */
- signal (SIGALRM, alarm_signal_handler);
-#endif /* USG */
-
if (atimers)
{
EMACS_TIME now, time;
t->next = a;
}
-
-/* Signal handler for SIGALRM. SIGNO is the signal number, i.e.
- SIGALRM. */
-
-SIGTYPE
-alarm_signal_handler (signo)
- int signo;
+static void
+run_timers ()
{
EMACS_TIME now;
EMACS_GET_TIME (now);
- pending_atimers = 0;
while (atimers
&& (pending_atimers = interrupt_input_blocked) == 0
EMACS_GET_TIME (now);
}
- set_alarm ();
+ 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
+}
+
+
+/* Signal handler for SIGALRM. SIGNO is the signal number, i.e.
+ SIGALRM. */
+
+SIGTYPE
+alarm_signal_handler (signo)
+ int signo;
+{
+#ifndef SYNC_INPUT
+ SIGNAL_THREAD_CHECK (signo);
+#endif
+
+ pending_atimers = 1;
+#ifdef SYNC_INPUT
+ pending_signals = 1;
+#else
+ run_timers ();
+#endif
}
if (pending_atimers)
{
BLOCK_ATIMERS;
- alarm_signal_handler (SIGALRM);
+ run_timers ();
UNBLOCK_ATIMERS;
}
}
void
init_atimer ()
{
- free_atimers = atimers = NULL;
+ free_atimers = stopped_atimers = atimers = NULL;
pending_atimers = 0;
+ /* pending_signals is initialized in init_keyboard.*/
signal (SIGALRM, alarm_signal_handler);
}