src/update_remove.c

   1 /*
   2  * Copyright (C) 2003-2010 The Music Player Daemon Project
   3  * http://www.musicpd.org
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #include "config.h" /* must be first for large file support */
  21 #include "update_internal.h"
  22 #include "notify.h"
  23 #include "event_pipe.h"
  24 #include "song.h"
  25 #include "playlist.h"
  26
  27 #ifdef ENABLE_SQLITE
  28 #include "sticker.h"
  29 #include "song_sticker.h"
  30 #endif
  31
  32 #include <glib.h>
  33
  34 #include <assert.h>
  35
  36 static const struct song *removed_song;
  37
  38 static struct notify remove_notify;
  39
  40 /**
  41  * Safely remove a song from the database.  This must be done in the
  42  * main task, to be sure that there is no pointer left to it.
  43  */
  44 static void
  45 song_remove_event(void)
  46 {
  47         char *uri;
  48
  49         assert(removed_song != NULL);
  50
  51         uri = song_get_uri(removed_song);
  52         g_debug("removing: %s", uri);
  53         g_free(uri);
  54
  55 #ifdef ENABLE_SQLITE
  56         /* if the song has a sticker, remove it */
  57         if (sticker_enabled())
  58                 sticker_song_delete(removed_song);
  59 #endif
  60
  61         playlist_delete_song(&g_playlist, removed_song);
  62         removed_song = NULL;
  63
  64         notify_signal(&remove_notify);
  65 }
  66
  67 void
  68 update_remove_global_init(void)
  69 {
  70         notify_init(&remove_notify);
  71
  72         event_pipe_register(PIPE_EVENT_DELETE, song_remove_event);
  73 }
  74
  75 void
  76 update_remove_global_finish(void)
  77 {
  78         notify_deinit(&remove_notify);
  79 }
  80
  81 void
  82 update_remove_song(const struct song *song)
  83 {
  84         assert(removed_song == NULL);
  85
  86         removed_song = song;
  87
  88         event_pipe_emit(PIPE_EVENT_DELETE);
  89
  90         do {
  91                 notify_wait(&remove_notify);
  92         } while (removed_song != NULL);
  93
  94 }