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Diffstat (limited to 'calendar/gui/alarm-notify/alarm.c')
-rw-r--r-- | calendar/gui/alarm-notify/alarm.c | 306 |
1 files changed, 0 insertions, 306 deletions
diff --git a/calendar/gui/alarm-notify/alarm.c b/calendar/gui/alarm-notify/alarm.c deleted file mode 100644 index f8e64b8bc0..0000000000 --- a/calendar/gui/alarm-notify/alarm.c +++ /dev/null @@ -1,306 +0,0 @@ -/* Evolution calendar - Low-level alarm timer mechanism - * - * Copyright (C) 2000 Ximian, 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" - - - -/* Our glib timeout */ -static guint timeout_id; - -/* The list of pending alarms */ -static GList *alarms = NULL; - -/* A queued alarm structure */ -typedef struct { - time_t trigger; - AlarmFunction alarm_fn; - gpointer data; - AlarmDestroyNotify destroy_notify_fn; -} AlarmRecord; - -static void setup_timeout (time_t now); - - - -/* Removes the head alarm from the queue. Does not touch the timeout_id. */ -static void -pop_alarm (void) -{ - AlarmRecord *ar; - GList *l; - - g_assert (alarms != NULL); - - ar = alarms->data; - - l = alarms; - alarms = g_list_remove_link (alarms, l); - g_list_free_1 (l); - - g_free (ar); -} - -/* Callback from the alarm timeout */ -static gboolean -alarm_ready_cb (gpointer data) -{ - time_t now; - - g_assert (alarms != NULL); - timeout_id = 0; - - now = time (NULL); - - while (alarms) { - AlarmRecord *notify_id, *ar; - AlarmRecord ar_copy; - - ar = alarms->data; - - if (ar->trigger > now) - break; - - notify_id = ar; - - ar_copy = *ar; - ar = &ar_copy; - - pop_alarm (); /* This will free the original AlarmRecord; that's why we copy it */ - - (* ar->alarm_fn) (notify_id, ar->trigger, ar->data); - - if (ar->destroy_notify_fn) - (* ar->destroy_notify_fn) (notify_id, ar->data); - } - - if (alarms) { - /* We need this check because one of the alarm_fn above may have - * re-entered and added an alarm of its own, so the timer will - * already be set up. - */ - if (timeout_id == 0) - setup_timeout (now); - } else - g_assert (timeout_id == 0); - - return FALSE; -} - -/* Sets up a timeout for the next minute. We do not need to be concerned with - * timezones here, as this is just a periodic check on the alarm queue. - */ -static void -setup_timeout (time_t now) -{ - time_t next, diff; - struct tm tm; - - g_assert (timeout_id == 0); - g_assert (alarms != NULL); - - tm = *localtime (&now); - tm.tm_sec = 0; - tm.tm_min++; /* next minute */ - - next = mktime (&tm); - g_assert (next != -1); - - diff = next - now; - - g_assert (diff >= 0); - timeout_id = g_timeout_add (diff * 1000, alarm_ready_cb, NULL); -} - -/* Used from g_list_insert_sorted(); compares the trigger times of two AlarmRecord structures. */ -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 void -queue_alarm (AlarmRecord *ar) -{ - time_t now; - AlarmRecord *old_head; - - if (alarms) { - g_assert (timeout_id != 0); - - old_head = alarms->data; - } else { - g_assert (timeout_id == 0); - - old_head = NULL; - } - - alarms = g_list_insert_sorted (alarms, ar, compare_alarm_by_time); - - if (old_head == alarms->data) - return; - - /* Set the timer for removal upon activation */ - - if (!old_head) { - now = time (NULL); - setup_timeout (now); - } -} - - - -/** - * 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) -{ - AlarmRecord *ar; - - g_return_val_if_fail (trigger != -1, NULL); - g_return_val_if_fail (alarm_fn != NULL, NULL); - - ar = g_new (AlarmRecord, 1); - ar->trigger = trigger; - ar->alarm_fn = alarm_fn; - ar->data = data; - ar->destroy_notify_fn = destroy_notify_fn; - - queue_alarm (ar); - - return ar; -} - -/** - * alarm_remove: - * @alarm: A queued alarm identifier. - * - * Removes an alarm from the alarm queue. - **/ -void -alarm_remove (gpointer alarm) -{ - AlarmRecord *notify_id, *ar; - AlarmRecord ar_copy; - AlarmRecord *old_head; - GList *l; - - 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; - - notify_id = ar; - - if (old_head == ar) { - ar_copy = *ar; - ar = &ar_copy; - pop_alarm (); /* This will free the original AlarmRecord; that's why we copy it */ - } else { - alarms = g_list_remove_link (alarms, l); - g_list_free_1 (l); - } - - /* Reset the timeout */ - - g_assert (timeout_id != 0); - - if (!alarms) { - g_source_remove (timeout_id); - timeout_id = 0; - } - - /* Notify about destructiono of the alarm */ - - if (ar->destroy_notify_fn) - (* ar->destroy_notify_fn) (notify_id, ar->data); - -} - -/** - * alarm_done: - * - * Terminates the alarm timer mechanism. This should be called at the end of - * the program. - **/ -void -alarm_done (void) -{ - GList *l; - - if (timeout_id == 0) { - g_assert (alarms == NULL); - return; - } - - g_assert (alarms != NULL); - - g_source_remove (timeout_id); - timeout_id = 0; - - 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; -} |