src/event_pipe.h

   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 #ifndef EVENT_PIPE_H
  21 #define EVENT_PIPE_H
  22
  23 #include <glib.h>
  24
  25 enum pipe_event {
  26         /** database update was finished */
  27         PIPE_EVENT_UPDATE,
  28
  29         /** during database update, a song was deleted */
  30         PIPE_EVENT_DELETE,
  31
  32         /** an idle event was emitted */
  33         PIPE_EVENT_IDLE,
  34
  35         /** must call playlist_sync() */
  36         PIPE_EVENT_PLAYLIST,
  37
  38         /** the current song's tag has changed */
  39         PIPE_EVENT_TAG,
  40
  41         /** SIGHUP received: reload configuration, roll log file */
  42         PIPE_EVENT_RELOAD,
  43
  44         /** a hardware mixer plugin has detected a change */
  45         PIPE_EVENT_MIXER,
  46
  47         PIPE_EVENT_MAX
  48 };
  49
  50 typedef void (*event_pipe_callback_t)(void);
  51
  52 void event_pipe_init(void);
  53
  54 void event_pipe_deinit(void);
  55
  56 void
  57 event_pipe_register(enum pipe_event event, event_pipe_callback_t callback);
  58
  59 void event_pipe_emit(enum pipe_event event);
  60
  61 /**
  62  * Similar to event_pipe_emit(), but aimed for use in signal handlers:
  63  * it doesn't lock the mutex, and doesn't log on error.  That makes it
  64  * potentially lossy, but for its intended use, that does not matter.
  65  */
  66 void event_pipe_emit_fast(enum pipe_event event);
  67
  68 #endif /* MAIN_NOTIFY_H */