vlc_objects.h: Export and implement vlc_object_set_destructor().

[vlc] / src / misc / objects.c

diff --git a/src/misc/objects.c b/src/misc/objects.c
index 7cbd1f8348877e0bd22172dc87761b237322372a..27bf8cd5bd6bbc4cb994390ecb2cf248f3ab1447 100644 (file)
--- a/src/misc/objects.c
+++ b/src/misc/objects.c
@@ -72,6 +72,12 @@
 #endif
 #include <assert.h>
 
+/*****************************************************************************
+ * Constants
+ *****************************************************************************/
+
+const vlc_destructor_t kVLCDestructor = NULL;
+
 /*****************************************************************************
  * Local prototypes
  *****************************************************************************/
@@ -193,6 +199,7 @@ vlc_object_t *vlc_custom_create( vlc_object_t *p_this, size_t i_size,
     }
 
     p_priv->i_refcount = 1;
+    p_priv->pf_destructor = kVLCDestructor;
     p_new->p_parent = NULL;
     p_new->pp_children = NULL;
     p_new->i_children = 0;
@@ -352,6 +359,24 @@ void * __vlc_object_create( vlc_object_t *p_this, int i_type )
 }
 
 
+/**
+ ****************************************************************************
+ * Set the destructor of a vlc object
+ *
+ * This function sets the destructor of the vlc object. It will be called
+ * when the object is destroyed when the its refcount reaches 0.
+ * (It is called by the internal function vlc_object_destroy())
+ *****************************************************************************/
+void __vlc_object_set_destructor( vlc_object_t *p_this,
+                                  vlc_destructor_t pf_destructor )
+{
+    vlc_object_internals_t *p_priv = vlc_internals(p_this );
+
+    vlc_mutex_lock( &structure_lock );
+    p_priv->pf_destructor = pf_destructor;
+    vlc_mutex_unlock( &structure_lock );
+}
+
 /**
  ****************************************************************************
  * Destroy a vlc object (Internal)
@@ -400,6 +425,11 @@ static void vlc_object_destroy( vlc_object_t *p_this )
         abort();
     }
 
+    /* Call the custom "subclass" destructor */
+    if( p_priv->pf_destructor )
+        p_priv->pf_destructor( p_this );
+
+
     /* Destroy the associated variables, starting from the end so that
      * no memmove calls have to be done. */
     while( p_priv->i_vars )