src/misc/variables.h

   1 /*****************************************************************************
   2  * variables.h: object variables typedefs
   3  *****************************************************************************
   4  * Copyright (C) 1999-2012 VLC authors and VideoLAN
   5  *
   6  * Authors: Samuel Hocevar <sam@zoy.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU Lesser General Public License as published by
  10  * the Free Software Foundation; either version 2.1 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 #ifndef LIBVLC_VARIABLES_H
  24 # define LIBVLC_VARIABLES_H 1
  25
  26 # include <stdalign.h>
  27 # include <stdatomic.h>
  28
  29 struct vlc_res;
  30
  31 /**
  32  * Private LibVLC data for each object.
  33  */
  34 typedef struct vlc_object_internals vlc_object_internals_t;
  35
  36 struct vlc_object_internals
  37 {
  38     alignas (max_align_t) /* ensure vlc_externals() is maximally aligned */
  39     char           *psz_name; /* given name */
  40
  41     /* Object variables */
  42     void           *var_root;
  43     vlc_mutex_t     var_lock;
  44     vlc_cond_t      var_wait;
  45
  46     /* Objects management */
  47     atomic_uint     refs;
  48     vlc_destructor_t pf_destructor;
  49
  50     /* Objects tree structure */
  51     vlc_object_internals_t *next;  /* next sibling */
  52     vlc_object_internals_t *prev;  /* previous sibling */
  53     vlc_object_internals_t *first; /* first child */
  54     vlc_mutex_t tree_lock;
  55
  56     /* Object resources */
  57     struct vlc_res *resources;
  58 };
  59
  60 # define vlc_internals( obj ) (((vlc_object_internals_t*)(VLC_OBJECT(obj)))-1)
  61 # define vlc_externals( priv ) ((vlc_object_t *)((priv) + 1))
  62
  63 void DumpVariables(vlc_object_t *obj);
  64
  65 extern void var_DestroyAll( vlc_object_t * );
  66
  67 /**
  68  * Return a list of all variable names
  69  *
  70  * There is no warranty that the returned variables will be still alive after
  71  * the return of this function.
  72  *
  73  * @return a NULL terminated list of char *, each elements and the return value
  74  * must be freed by the caller
  75  */
  76 char **var_GetAllNames(vlc_object_t *);
  77
  78 #endif