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author | nobody <nobody@localhost> | 2000-05-22 06:40:15 +0800 |
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committer | nobody <nobody@localhost> | 2000-05-22 06:40:15 +0800 |
commit | 573469db0d4d8a5a328137342c041bd005eaf974 (patch) | |
tree | 70ea22d6a4da2e07bedfe85a5cddc5e7ad0a1246 /calendar/gui/alarm.c | |
parent | 3f5d9cb60827ca2a5e032e95aa241cc8376ab46f (diff) | |
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This commit was manufactured by cvs2svn to create tag 'MC_4_5_47'.MC_4_5_47
svn path=/tags/MC_4_5_47/; revision=3158
Diffstat (limited to 'calendar/gui/alarm.c')
-rw-r--r-- | calendar/gui/alarm.c | 305 |
1 files changed, 0 insertions, 305 deletions
diff --git a/calendar/gui/alarm.c b/calendar/gui/alarm.c deleted file mode 100644 index 20f64ffd75..0000000000 --- a/calendar/gui/alarm.c +++ /dev/null @@ -1,305 +0,0 @@ -/* Evolution calendar - alarm notification support - * - * Copyright (C) 2000 Helix Code, Inc. - * - * Authors: Miguel de Icaza <miguel@helixcode.com> - * Federico Mena-Quintero <federico@helixcode.com> - * - * This program 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 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. - */ - -#include <config.h> -#include <time.h> -#include <gnome.h> -#include <fcntl.h> -#include <signal.h> -#include <sys/time.h> -#include <cal-util/calobj.h> -#include "alarm.h" - - - -/* The pipes used to notify about an alarm */ -static int alarm_pipes [2]; - -/* The list of pending alarms */ -static GList *alarms; - -/* A queued alarm structure */ -typedef struct { - time_t trigger; - AlarmFunction alarm_fn; - gpointer data; - AlarmDestroyNotify destroy_notify_fn; -} AlarmRecord; - - - -/* SIGALRM handler. Notifies the callback about the alarm. */ -static void -alarm_signal (int arg) -{ - char c = 0; - - write (alarm_pipes [1], &c, 1); -} - -/* Sets up an itimer and returns a success code */ -static gboolean -setup_itimer (time_t diff) -{ - struct itimerval itimer; - int v; - - itimer.it_interval.tv_sec = 0; - itimer.it_interval.tv_usec = 0; - itimer.it_value.tv_sec = diff; - itimer.it_value.tv_usec = 0; - - v = setitimer (ITIMER_REAL, &itimer, NULL); - - return (v == 0) ? TRUE : FALSE; -} - -/* Removes the head alarm, returns it, and schedules the next alarm in the - * queue. - */ -static AlarmRecord * -pop_alarm (void) -{ - AlarmRecord *ar; - GList *l; - - if (!alarms) - return NULL; - - ar = alarms->data; - - l = alarms; - alarms = g_list_remove_link (alarms, l); - g_list_free_1 (l); - - if (alarms) { - time_t now; - AlarmRecord *new_ar; - - now = time (NULL); - new_ar = alarms->data; - - if (!setup_itimer (new_ar->trigger)) { - g_message ("pop_alarm(): Could not reset the timer! " - "Weird things will happen."); - - /* FIXME: should we free the alarm list? What - * about further alarm removal requests that - * will fail? - */ - } - } else { - struct itimerval itimer; - int v; - - itimer.it_interval.tv_sec = 0; - itimer.it_interval.tv_usec = 0; - itimer.it_value.tv_sec = 0; - itimer.it_value.tv_usec = 0; - - v = setitimer (ITIMER_REAL, &itimer, NULL); - if (v != 0) - g_message ("pop_alarm(): Could not clear the timer! " - "Weird things may happen."); - } - - return ar; -} - -/* Input handler for our own alarm notification pipe */ -static void -alarm_ready (gpointer data, gint fd, GdkInputCondition cond) -{ - AlarmRecord *ar; - char c; - - if (read (alarm_pipes [0], &c, 1) != 1) { - g_message ("alarm_ready(): Uh? Could not read from notification pipe."); - return; - } - - g_assert (alarms != NULL); - ar = pop_alarm (); - - g_message ("alarm_ready(): Notifying about alarm on %s", ctime (&ar->trigger)); - - (* ar->alarm_fn) (ar, ar->trigger, ar->data); - - if (ar->destroy_notify_fn) - (* ar->destroy_notify_fn) (ar->data); - - g_free (ar); -} - -static int -compare_alarm_by_time (gconstpointer a, gconstpointer b) -{ - const AlarmRecord *ara = a; - const AlarmRecord *arb = b; - time_t diff; - - diff = ara->trigger - arb->trigger; - return (diff < 0) ? -1 : (diff > 0) ? 1 : 0; -} - -/* Adds an alarm to the queue and sets up the timer */ -static gboolean -queue_alarm (time_t now, AlarmRecord *ar) -{ - time_t diff; - AlarmRecord *old_head; - - if (alarms) - old_head = alarms->data; - else - old_head = NULL; - - alarms = g_list_insert_sorted (alarms, ar, compare_alarm_by_time); - - if (old_head == alarms->data) - return TRUE; - - /* Set the timer for removal upon activation */ - - diff = ar->trigger - now; - if (!setup_itimer (diff)) { - GList *l; - - g_message ("queue_alarm(): Could not set up timer! Not queueing alarm."); - - l = g_list_find (alarms, ar); - g_assert (l != NULL); - - alarms = g_list_remove_link (alarms, l); - g_list_free_1 (l); - return FALSE; - } - - return TRUE; -} - -/** - * alarm_add: - * @trigger: Time at which alarm will trigger. - * @alarm_fn: Callback for trigger. - * @data: Closure data for callback. - * - * Adds an alarm to trigger at the specified time. The @alarm_fn will be called - * with the provided data and the alarm will be removed from the trigger list. - * - * Return value: An identifier for this alarm; it can be used to remove the - * alarm later with alarm_remove(). If the trigger time occurs in the past, then - * the alarm will not be queued and the function will return NULL. - **/ -gpointer -alarm_add (time_t trigger, AlarmFunction alarm_fn, gpointer data, - AlarmDestroyNotify destroy_notify_fn) -{ - time_t now; - AlarmRecord *ar; - - now = time (NULL); - if (trigger < now) - return NULL; - - ar = g_new (AlarmRecord, 1); - ar->trigger = trigger; - ar->alarm_fn = alarm_fn; - ar->data = data; - ar->destroy_notify_fn = destroy_notify_fn; - - g_message ("alarm_add(): Adding alarm for %s", ctime (&trigger)); - - if (!queue_alarm (now, ar)) { - if (ar->destroy_notify_fn) - (* ar->destroy_notify_fn) (ar->data); - - g_free (ar); - ar = NULL; - } - - return ar; -} - -/** - * alarm_remove: - * @alarm: A queued alarm identifier. - * - * Removes an alarm from the alarm queue. - **/ -void -alarm_remove (gpointer alarm) -{ - AlarmRecord *ar; - AlarmRecord *old_head; - GList *l; - - ar = alarm; - - l = g_list_find (alarms, ar); - if (!l) { - g_message ("alarm_remove(): Requested removal of nonexistent alarm!"); - return; - } - - old_head = alarms->data; - - if (old_head == ar) - pop_alarm (); - else { - alarms = g_list_remove_link (alarms, l); - g_list_free_1 (l); - } - - if (ar->destroy_notify_fn) - (* ar->destroy_notify_fn) (ar->data); - - g_free (ar); -} - -/** - * alarm_init: - * @void: - * - * Initializes the alarm notification system. This must be called near the - * beginning of the program. - **/ -void -alarm_init (void) -{ - struct sigaction sa; - int flags; - - pipe (alarm_pipes); - - /* set non blocking mode */ - flags = 0; - fcntl (alarm_pipes [0], F_GETFL, &flags); - fcntl (alarm_pipes [0], F_SETFL, flags | O_NONBLOCK); - gdk_input_add (alarm_pipes [0], GDK_INPUT_READ, alarm_ready, NULL); - - /* Setup the signal handler */ - sa.sa_handler = alarm_signal; - sigemptyset (&sa.sa_mask); - sa.sa_flags = SA_RESTART; - sigaction (SIGALRM, &sa, NULL); -} |