G_BEGIN_DECLS
-#define GST_MINI_OBJECT_CAST(obj) ((GstMiniObject*)(obj))
-#define GST_MINI_OBJECT_CONST_CAST(obj) ((const GstMiniObject*)(obj))
+#define GST_IS_MINI_OBJECT_TYPE(obj,type) ((obj) && GST_MINI_OBJECT_TYPE(obj) == (type))
+#define GST_MINI_OBJECT_CAST(obj) ((GstMiniObject*)(obj))
+#define GST_MINI_OBJECT_CONST_CAST(obj) ((const GstMiniObject*)(obj))
+#define GST_MINI_OBJECT(obj) (GST_MINI_OBJECT_CAST(obj))
typedef struct _GstMiniObject GstMiniObject;
* GstMiniObjectCopyFunction:
* @obj: MiniObject to copy
*
- * Virtual function prototype for methods to create copies of instances.
+ * Function prototype for methods to create copies of instances.
*
* Returns: reference to cloned instance.
*/
typedef GstMiniObject * (*GstMiniObjectCopyFunction) (const GstMiniObject *obj);
/**
+ * GstMiniObjectDisposeFunction:
+ * @obj: MiniObject to dispose
+ *
+ * Function prototype for when a miniobject has lost its last refcount.
+ * Implementation of the mini object are allowed to revive the
+ * passed object by doing a gst_mini_object_ref(). If the object is not
+ * revived after the dispose function, the function should return %TRUE
+ * and the memory associated with the object is freed.
+ *
+ * Returns: %TRUE if the object should be cleaned up.
+ */
+typedef gboolean (*GstMiniObjectDisposeFunction) (GstMiniObject *obj);
+/**
* GstMiniObjectFreeFunction:
* @obj: MiniObject to free
*
* Virtual function prototype for methods to free ressources used by
- * mini-objects. Subclasses of the mini object are allowed to revive the
- * passed object by doing a gst_mini_object_ref(). If the object is not
- * revived after the free function, the memory associated with the
- * object is freed.
+ * mini-objects.
*/
typedef void (*GstMiniObjectFreeFunction) (GstMiniObject *obj);
+ /**
+ * GstMiniObjectWeakNotify:
+ * @data: data that was provided when the weak reference was established
+ * @where_the_mini_object_was: the mini object being finalized
+ *
+ * A #GstMiniObjectWeakNotify function can be added to a mini object as a
+ * callback that gets triggered when the mini object is finalized. Since the
+ * mini object is already being finalized when the #GstMiniObjectWeakNotify is
+ * called, there's not much you could do with the object, apart from e.g. using
+ * its adress as hash-index or the like.
+ *
+ * Since: 0.10.35
+ */
+typedef void (*GstMiniObjectWeakNotify) (gpointer data,
+ GstMiniObject * where_the_mini_object_was);
+
/**
* GST_MINI_OBJECT_FLAGS:
* @obj: MiniObject to return flags for.
/**
* GstMiniObjectFlags:
- * @GST_MINI_OBJECT_FLAG_READONLY: is the miniobject readonly or writable
- * @GST_MINI_OBJECT_FLAG_RESERVED1: a flag reserved for internal use e.g. as
- * GST_BUFFER_FLAG_MEDIA4. Since: 0.10.33.
* @GST_MINI_OBJECT_FLAG_LAST: first flag that can be used by subclasses.
*
* Flags for the mini object
*/
typedef enum
{
- GST_MINI_OBJECT_FLAG_READONLY = (1<<0),
- GST_MINI_OBJECT_FLAG_RESERVED1 = (1<<1),
/* padding */
GST_MINI_OBJECT_FLAG_LAST = (1<<4)
} GstMiniObjectFlags;
#define GST_MINI_OBJECT_REFCOUNT_VALUE(obj) (g_atomic_int_get (&(GST_MINI_OBJECT_CAST(obj))->refcount))
/**
+ * GST_MINI_OBJECT_SIZE:
+ * @obj: a #GstMiniObject
+ *
+ * Get the allocated size of @obj.
+ */
+#define GST_MINI_OBJECT_SIZE(obj) ((GST_MINI_OBJECT_CAST(obj))->size)
+
+/**
* GstMiniObject:
- * @instance: type instance
* @refcount: atomic refcount
* @flags: extra flags.
- *
+ * @copy: a copy function
+ * @dispose: a dispose function
+ * @free: the free function
+ *
* Base class for refcounted lightweight objects.
* Ref Func: gst_mini_object_ref
* Unref Func: gst_mini_object_unref
- * Set Value Func: gst_value_set_mini_object
- * Get Value Func: gst_value_get_mini_object
+ * Set Value Func: g_value_set_boxed
+ * Get Value Func: g_value_get_boxed
*/
struct _GstMiniObject {
GType type;
/*< public >*/ /* with COW */
gint refcount;
guint flags;
+ gsize size;
GstMiniObjectCopyFunction copy;
+ GstMiniObjectDisposeFunction dispose;
GstMiniObjectFreeFunction free;
+
+ /* < private > */
+ /* Used to keep track of weak ref notifies */
+ guint n_weak_refs;
+ struct
+ {
+ GstMiniObjectWeakNotify notify;
+ gpointer data;
+ } *weak_refs;
};
-GType gst_mini_object_get_type (void);
+void gst_mini_object_init (GstMiniObject *mini_object,
+ GType type, gsize size);
-GstMiniObject* gst_mini_object_copy (const GstMiniObject *mini_object);
-gboolean gst_mini_object_is_writable (const GstMiniObject *mini_object);
-GstMiniObject* gst_mini_object_make_writable (GstMiniObject *mini_object);
+GstMiniObject * gst_mini_object_copy (const GstMiniObject *mini_object);
+gboolean gst_mini_object_is_writable (const GstMiniObject *mini_object);
+GstMiniObject * gst_mini_object_make_writable (GstMiniObject *mini_object);
/* refcounting */
-GstMiniObject* gst_mini_object_ref (GstMiniObject *mini_object);
-void gst_mini_object_unref (GstMiniObject *mini_object);
-
-void gst_mini_object_replace (GstMiniObject **olddata, GstMiniObject *newdata);
-
+GstMiniObject * gst_mini_object_ref (GstMiniObject *mini_object);
+void gst_mini_object_unref (GstMiniObject *mini_object);
+
+void gst_mini_object_weak_ref (GstMiniObject *object,
+ GstMiniObjectWeakNotify notify,
+ gpointer data);
+void gst_mini_object_weak_unref (GstMiniObject *object,
+ GstMiniObjectWeakNotify notify,
+ gpointer data);
+
+gboolean gst_mini_object_replace (GstMiniObject **olddata, GstMiniObject *newdata);
+gboolean gst_mini_object_take (GstMiniObject **olddata, GstMiniObject *newdata);
+GstMiniObject * gst_mini_object_steal (GstMiniObject **olddata);
+
+#define GST_DEFINE_MINI_OBJECT_TYPE(TypeName,type_name) \
+ G_DEFINE_BOXED_TYPE(TypeName,type_name, \
+ (GBoxedCopyFunc) gst_mini_object_ref, \
+ (GBoxedFreeFunc)gst_mini_object_unref)
G_END_DECLS
projects / platform / upstream / gstreamer.git / blobdiff