2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
4 * 2005 Wim Taymans <wim@fluendo.com>
6 * gstobject.h: Header for base GstObject
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library 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 GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
24 #ifndef __GST_OBJECT_H__
25 #define __GST_OBJECT_H__
27 #include <gst/gstconfig.h>
29 #include <glib-object.h>
33 #define GST_TYPE_OBJECT (gst_object_get_type ())
34 #define GST_IS_OBJECT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_OBJECT))
35 #define GST_IS_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_OBJECT))
36 #define GST_OBJECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_OBJECT, GstObjectClass))
37 #define GST_OBJECT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_OBJECT, GstObject))
38 #define GST_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_OBJECT, GstObjectClass))
39 #define GST_OBJECT_CAST(obj) ((GstObject*)(obj))
40 #define GST_OBJECT_CLASS_CAST(klass) ((GstObjectClass*)(klass))
44 * @GST_OBJECT_FLAG_LAST: subclasses can add additional flags starting from this flag
46 * The standard flags that an gstobject may have.
51 GST_OBJECT_FLAG_LAST = (1<<4)
55 * GST_OBJECT_REFCOUNT:
58 * Get access to the reference count field of the object.
60 #define GST_OBJECT_REFCOUNT(obj) (((GObject*)(obj))->ref_count)
62 * GST_OBJECT_REFCOUNT_VALUE:
65 * Get the reference count value of the object.
67 #define GST_OBJECT_REFCOUNT_VALUE(obj) g_atomic_int_get ((gint *) &GST_OBJECT_REFCOUNT(obj))
69 /* we do a GST_OBJECT_CAST to avoid type checking, better call these
70 * function with a valid object! */
73 * GST_OBJECT_GET_LOCK:
76 * Acquire a reference to the mutex of this object.
78 #define GST_OBJECT_GET_LOCK(obj) (GST_OBJECT_CAST(obj)->lock)
81 * @obj: a #GstObject to lock
83 * This macro will obtain a lock on the object, making serialization possible.
84 * It blocks until the lock can be obtained.
86 #define GST_OBJECT_LOCK(obj) g_mutex_lock(GST_OBJECT_GET_LOCK(obj))
91 * This macro will try to obtain a lock on the object, but will return with
92 * FALSE if it can't get it immediately.
94 #define GST_OBJECT_TRYLOCK(obj) g_mutex_trylock(GST_OBJECT_GET_LOCK(obj))
97 * @obj: a #GstObject to unlock.
99 * This macro releases a lock on the object.
101 #define GST_OBJECT_UNLOCK(obj) g_mutex_unlock(GST_OBJECT_GET_LOCK(obj))
108 * Get the name of this object
110 #define GST_OBJECT_NAME(obj) (GST_OBJECT_CAST(obj)->name)
115 * Get the parent of this object
117 #define GST_OBJECT_PARENT(obj) (GST_OBJECT_CAST(obj)->parent)
124 * This macro returns the entire set of flags for the object.
126 #define GST_OBJECT_FLAGS(obj) (GST_OBJECT_CAST (obj)->flags)
128 * GST_OBJECT_FLAG_IS_SET:
130 * @flag: Flag to check for
132 * This macro checks to see if the given flag is set.
134 #define GST_OBJECT_FLAG_IS_SET(obj,flag) ((GST_OBJECT_FLAGS (obj) & (flag)) == (flag))
136 * GST_OBJECT_FLAG_SET:
140 * This macro sets the given bits.
142 #define GST_OBJECT_FLAG_SET(obj,flag) (GST_OBJECT_FLAGS (obj) |= (flag))
144 * GST_OBJECT_FLAG_UNSET:
148 * This macro usets the given bits.
150 #define GST_OBJECT_FLAG_UNSET(obj,flag) (GST_OBJECT_FLAGS (obj) &= ~(flag))
153 typedef struct _GstObject GstObject;
154 typedef struct _GstObjectClass GstObjectClass;
159 * @name: The name of the object
160 * @parent: this object's parent, weak ref
161 * @flags: flags for this object
163 * GStreamer base object class.
166 GInitiallyUnowned object;
168 /*< public >*/ /* with LOCK */
169 GMutex *lock; /* object LOCK */
170 gchar *name; /* object name */
171 GstObject *parent; /* this object's parent, weak ref */
175 gpointer _gst_reserved;
180 * @parent_class: parent
181 * @path_string_separator: separator used by gst_object_get_path_string()
182 * @deep_notify: default signal handler
184 * GStreamer base object class.
186 struct _GstObjectClass {
187 GInitiallyUnownedClass parent_class;
189 const gchar *path_string_separator;
192 void (*deep_notify) (GstObject * object, GstObject * orig, GParamSpec * pspec);
195 /* virtual methods for subclasses */
198 gpointer _gst_reserved[GST_PADDING];
201 /* normal GObject stuff */
202 GType gst_object_get_type (void);
205 gboolean gst_object_set_name (GstObject *object, const gchar *name);
206 gchar* gst_object_get_name (GstObject *object);
208 /* parentage routines */
209 gboolean gst_object_set_parent (GstObject *object, GstObject *parent);
210 GstObject* gst_object_get_parent (GstObject *object);
211 void gst_object_unparent (GstObject *object);
212 gboolean gst_object_has_ancestor (GstObject *object, GstObject *ancestor);
214 void gst_object_default_deep_notify (GObject *object, GstObject *orig,
215 GParamSpec *pspec, gchar **excluded_props);
217 /* refcounting + life cycle */
218 gpointer gst_object_ref (gpointer object);
219 void gst_object_unref (gpointer object);
220 gpointer gst_object_ref_sink (gpointer object);
222 /* replace object pointer */
223 gboolean gst_object_replace (GstObject **oldobj, GstObject *newobj);
225 /* printing out the 'path' of the object */
226 gchar * gst_object_get_path_string (GstObject *object);
229 gboolean gst_object_check_uniqueness (GList *list, const gchar *name);
233 #endif /* __GST_OBJECT_H__ */