playlist: Use a set/release accessor for playlist->p_input.

(To better track when to attach/detach events).

src/playlist/control.c

@@ -476,8 +476,12 @@ int playlist_PlayItem( playlist_t *p_playlist, playlist_item_t *p_item )
 
     var_SetInteger( p_playlist, "activity", i_activity +
                     DEFAULT_INPUT_ACTIVITY );
-    p_playlist->p_input =
+
+    input_thread_t * p_input_thread =
         input_CreateThreadExtended( p_playlist, p_input, NULL, *pp_sout );
+    playlist_set_current_input( p_playlist, p_input_thread );
+    vlc_object_release( p_input_thread );
+
     *pp_sout = NULL;
 
     char *psz_uri = input_item_GetURI( p_item->p_input );

src/playlist/engine.c

@@ -39,6 +39,7 @@
  *****************************************************************************/
 static void VariablesInit( playlist_t *p_playlist );
 static void playlist_Destructor( vlc_object_t * p_this );
+static void playlist_Destructor( vlc_object_t * p_this );
 
 static int RandomCallback( vlc_object_t *p_this, char const *psz_cmd,
                            vlc_value_t oldval, vlc_value_t newval, void *a )
@@ -244,19 +245,13 @@ check_input:
             PL_DEBUG( "dead input" );
 
             p_input = p_playlist->p_input;
-            p_playlist->p_input = NULL;
+
             assert( *pp_sout == NULL );
             if( var_CreateGetBool( p_input, "sout-keep" ) )
                 *pp_sout = input_DetachSout( p_input );
 
-            /* Release the playlist lock, because we may get stuck
-             * in vlc_object_release() for some time. */
-            PL_UNLOCK;
-
             /* Destroy input */
-            vlc_object_release( p_input );
-
-            PL_LOCK;
+            playlist_release_current_input( p_playlist );
 
             p_playlist->gc_date = mdate();
             p_playlist->b_cant_sleep = true;
@@ -275,6 +270,7 @@ check_input:
             i_activity= var_GetInteger( p_playlist, "activity" );
             var_SetInteger( p_playlist, "activity", i_activity -
                             DEFAULT_INPUT_ACTIVITY );
+
             goto check_input;
         }
         /* This input is dying, let it do */
@@ -378,18 +374,13 @@ void playlist_LastLoop( playlist_t *p_playlist )
 
         if( p_playlist->p_input->b_dead )
         {
-            input_thread_t *p_input;
-
-            /* Unlink current input */
-            p_input = p_playlist->p_input;
-            p_playlist->p_input = NULL;
-            PL_UNLOCK;
+            /* remove input */
+            playlist_release_current_input( p_playlist );
 
             /* sout-keep: no need to anything here.
              * The last input will destroy its sout, if any, by itself */
 
-            /* Destroy input */
-            vlc_object_release( p_input );
+            PL_UNLOCK;
             continue;
         }
         else if( p_playlist->p_input->b_die )

src/playlist/playlist_internal.h

@@ -35,6 +35,7 @@
  */
 
 #include "input/input_internal.h"
+#include <assert.h>
 
 struct playlist_preparse_t
 {
@@ -109,6 +110,37 @@ playlist_item_t *playlist_ItemFindFromInputAndRoot( playlist_t *p_playlist,
 int playlist_DeleteFromItemId( playlist_t*, int );
 int playlist_ItemDelete ( playlist_item_t * );
 
+static inline void playlist_release_current_input( playlist_t * p_playlist )
+{
+    vlc_assert_locked( &p_playlist->object_lock );
+
+    if( !p_playlist->p_input ) return;
+
+    input_thread_t * p_input = p_playlist->p_input;
+    p_playlist->p_input = NULL;
+
+    /* Release the playlist lock, because we may get stuck
+     * in vlc_object_release() for some time. */
+    PL_UNLOCK;
+    vlc_object_release( p_input );
+    PL_LOCK;
+}
+
+static inline void playlist_set_current_input(
+    playlist_t * p_playlist, input_thread_t * p_input )
+{
+    vlc_assert_locked( &p_playlist->object_lock );
+
+    playlist_release_current_input( p_playlist );
+
+    if( p_input )
+    {
+        vlc_object_yield( p_input );
+        p_playlist->p_input = p_input;
+    }
+}
+
+
 /**
  * @}
  */