intf: move linked-list head to libvlc_priv_t

For the playlist_t => vlc_playlist_t transition.

src/interface/interface.c

@@ -93,6 +93,7 @@ static int intf_CreateInternal( libvlc_int_t *libvlc, playlist_t *playlist,
         if (!playlist)
             return VLC_EGENERIC;
     }
+    libvlc_priv_t *priv = libvlc_priv(vlc_object_instance(playlist));
 
     /* Allocate structure */
     intf_thread_t *p_intf = vlc_custom_create( playlist, sizeof( *p_intf ),
@@ -135,8 +136,8 @@ static int intf_CreateInternal( libvlc_int_t *libvlc, playlist_t *playlist,
     }
 
     vlc_mutex_lock( &lock );
-    p_intf->p_next = pl_priv( playlist )->interface;
-    pl_priv( playlist )->interface = p_intf;
+    p_intf->p_next = priv->interface;
+    priv->interface = p_intf;
     vlc_mutex_unlock( &lock );
 
     return VLC_SUCCESS;
@@ -309,13 +310,14 @@ int libvlc_InternalAddIntf(libvlc_int_t *libvlc, const char *name)
  */
 void intf_DestroyAll(libvlc_int_t *libvlc)
 {
+    libvlc_priv_t *priv = libvlc_priv(libvlc);
     playlist_t *playlist;
 
     vlc_mutex_lock(&lock);
     playlist = libvlc_priv(libvlc)->playlist;
     if (playlist != NULL)
     {
-        intf_thread_t *intf, **pp = &(pl_priv(playlist)->interface);
+        intf_thread_t *intf, **pp = &priv->interface;
 
         while ((intf = *pp) != NULL)
         {

src/libvlc.c

@@ -94,6 +94,7 @@ libvlc_int_t * libvlc_InternalCreate( void )
         return NULL;
 
     priv = libvlc_priv (p_libvlc);
+    priv->interface = NULL;
     priv->playlist = NULL;
     priv->main_playlist = NULL;
     priv->p_vlm = NULL;

src/libvlc.h

@@ -186,6 +186,7 @@ typedef struct libvlc_priv_t
     vlm_t             *p_vlm;  ///< the VLM singleton (or NULL)
     vlc_dialog_provider *p_dialog_provider; ///< dialog provider
     vlc_keystore      *p_memory_keystore; ///< memory keystore
+    struct intf_thread_t *interface; ///< Linked-list of interfaces
     struct playlist_t *playlist; ///< Playlist for interfaces
     vlc_playlist_t *main_playlist;
     struct input_preparser_t *parser; ///< Input item meta data handler

src/playlist_legacy/playlist_internal.h

@@ -43,7 +43,6 @@ void playlist_ServicesDiscoveryKillAll( playlist_t *p_playlist );
 typedef struct playlist_private_t
 {
     playlist_t           public_data;
-    struct intf_thread_t *interface; /**< Linked-list of interfaces */
 
     void *input_tree; /**< Search tree for input item
                            to playlist item mapping */