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This commit was manufactured by cvs2svn to create tag 'XST_0_4_0'.XST_0_4_0
svn path=/tags/XST_0_4_0/; revision=9363
Diffstat (limited to 'calendar/gui/alarm-notify/alarm.c')
-rw-r--r-- | calendar/gui/alarm-notify/alarm.c | 357 |
1 files changed, 0 insertions, 357 deletions
diff --git a/calendar/gui/alarm-notify/alarm.c b/calendar/gui/alarm-notify/alarm.c deleted file mode 100644 index d32d8f1af9..0000000000 --- a/calendar/gui/alarm-notify/alarm.c +++ /dev/null @@ -1,357 +0,0 @@ -/* Evolution calendar - Low-level alarm timer mechanism - * - * Copyright (C) 2000 Helix Code, Inc. - * Copyright (C) 2000 Ximian, Inc. - * - * Authors: Miguel de Icaza <miguel@ximian.com> - * Federico Mena-Quintero <federico@ximian.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 <unistd.h> -#include <time.h> -#include <fcntl.h> -#include <signal.h> -#include <sys/time.h> -#include <gdk/gdk.h> -#include "alarm.h" - - - -/* Whether the timer system has been initialized */ -static gboolean alarm_inited; - -/* 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; -} - -/* Clears the itimer we have pending */ -static gboolean -clear_itimer (void) -{ - return setup_itimer (0); -} - -/* 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 - now)) { - 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 - if (!clear_itimer ()) - 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_print ("alarm_ready(): Notifying about alarm on %s\n", ctime (&ar->trigger)); - - (* ar->alarm_fn) (ar, ar->trigger, ar->data); - - if (ar->destroy_notify_fn) - (* ar->destroy_notify_fn) (ar, 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; - - g_return_val_if_fail (alarm_inited, NULL); - g_return_val_if_fail (trigger != -1, NULL); - g_return_val_if_fail (alarm_fn != NULL, NULL); - - 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_print ("alarm_add(): Adding alarm for %s\n", ctime (&trigger)); - - if (!queue_alarm (now, ar)) { - 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; - - g_return_if_fail (alarm_inited); - g_return_if_fail (alarm != NULL); - - 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, ar->data); - - g_free (ar); -} - -/** - * alarm_init: - * - * Initializes the alarm timer mechanism. This must be called near the - * beginning of the program. - **/ -void -alarm_init (void) -{ - struct sigaction sa; - int flags; - - g_return_if_fail (alarm_inited == FALSE); - - 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); - - alarm_inited = TRUE; -} - -/** - * alarm_done: - * - * Terminates the alarm timer mechanism. This should be called at the end of - * the program. - **/ -void -alarm_done (void) -{ - GList *l; - - g_return_if_fail (alarm_inited); - - if (!clear_itimer ()) - g_message ("alarm_done(): Could not clear the timer! " - "Weird things may happen."); - - for (l = alarms; l; l = l->next) { - AlarmRecord *ar; - - ar = l->data; - - if (ar->destroy_notify_fn) - (* ar->destroy_notify_fn) (ar, ar->data); - - g_free (ar); - } - - g_list_free (alarms); - alarms = NULL; - - if (close (alarm_pipes[0]) != 0) - g_message ("alarm_done(): Could not close the input pipe for notification"); - - alarm_pipes[0] = -1; - - if (close (alarm_pipes[1]) != 0) - g_message ("alarm_done(): Could not close the output pipe for notification"); - - alarm_pipes[1] = -1; - - alarm_inited = FALSE; -} |