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))
42 /* make sure we don't change the object size but still make it compile
44 #ifdef GST_DISABLE_LOADSAVE_REGISTRY
45 #define xmlNodePtr gpointer
50 * @GST_OBJECT_DISPOSING: the object is been destroyed, do use it anymore
51 * @GST_OBJECT_FLOATING: the object has a floating reference count (e.g. its
52 * not assigned to a bin)
53 * @GST_OBJECT_FLAG_LAST: subclasses can add additional flags starting from this flag
55 * The standard flags that an gstobject may have.
59 GST_OBJECT_DISPOSING = (1<<0),
60 GST_OBJECT_FLOATING = (1<<1),
62 GST_OBJECT_FLAG_LAST = (1<<4)
65 #ifdef GST_HAVE_GLIB_2_8
67 * GST_OBJECT_REFCOUNT:
70 * Get access to the reference count field of the object.
72 #define GST_OBJECT_REFCOUNT(obj) (((GObject*)(obj))->ref_count)
74 * GST_OBJECT_REFCOUNT_VALUE:
77 * Get the reference count value of the object.
79 #define GST_OBJECT_REFCOUNT_VALUE(obj) GST_OBJECT_REFCOUNT(obj)
81 #define GST_OBJECT_REFCOUNT(obj) ((GST_OBJECT_CAST(obj))->refcount)
82 #define GST_OBJECT_REFCOUNT_VALUE(obj) (g_atomic_int_get (&(GST_OBJECT_CAST(obj))->refcount))
83 #endif /* GST_HAVE_GLIB_2_8 */
85 /* we do a GST_OBJECT_CAST to avoid type checking, better call these
86 * function with a valid object! */
89 * GST_OBJECT_GET_LOCK:
92 * Acquire a reference to the mutex of this object.
94 #define GST_OBJECT_GET_LOCK(obj) (GST_OBJECT_CAST(obj)->lock)
97 * @obj: a #GstObject to lock
99 * This macro will obtain a lock on the object, making serialization possible.
100 * It blocks until the lock can be obtained.
102 #define GST_OBJECT_LOCK(obj) g_mutex_lock(GST_OBJECT_GET_LOCK(obj))
104 * GST_OBJECT_TRYLOCK:
107 * This macro will try to obtain a lock on the object, but will return with
108 * FALSE if it can't get it immediately.
110 #define GST_OBJECT_TRYLOCK(obj) g_mutex_trylock(GST_OBJECT_GET_LOCK(obj))
113 * @obj: a #GstObject to unlock.
115 * This macro releases a lock on the object.
117 #define GST_OBJECT_UNLOCK(obj) g_mutex_unlock(GST_OBJECT_GET_LOCK(obj))
124 * Get the name of this object
126 #define GST_OBJECT_NAME(obj) (GST_OBJECT_CAST(obj)->name)
131 * Get the parent of this object
133 #define GST_OBJECT_PARENT(obj) (GST_OBJECT_CAST(obj)->parent)
140 * This macro returns the entire set of flags for the object.
142 #define GST_OBJECT_FLAGS(obj) (GST_OBJECT_CAST (obj)->flags)
144 * GST_OBJECT_FLAG_IS_SET:
146 * @flag: Flag to check for
148 * This macro checks to see if the given flag is set.
150 #define GST_OBJECT_FLAG_IS_SET(obj,flag) ((GST_OBJECT_FLAGS (obj) & (flag)) == (flag))
152 * GST_OBJECT_FLAG_SET:
156 * This macro sets the given bits.
158 #define GST_OBJECT_FLAG_SET(obj,flag) (GST_OBJECT_FLAGS (obj) |= (flag))
160 * GST_OBJECT_FLAG_UNSET:
164 * This macro usets the given bits.
166 #define GST_OBJECT_FLAG_UNSET(obj,flag) (GST_OBJECT_FLAGS (obj) &= ~(flag))
170 * GST_OBJECT_IS_DISPOSING:
173 * Check if the given object is beeing destroyed.
175 #define GST_OBJECT_IS_DISPOSING(obj) (GST_OBJECT_FLAG_IS_SET (obj, GST_OBJECT_DISPOSING))
177 * GST_OBJECT_IS_FLOATING:
180 * Check if the given object is floating (has no owner).
182 #define GST_OBJECT_IS_FLOATING(obj) (GST_OBJECT_FLAG_IS_SET (obj, GST_OBJECT_FLOATING))
184 typedef struct _GstObject GstObject;
185 typedef struct _GstObjectClass GstObjectClass;
189 * @refcount: only used ifndef GST_HAVE_GLIB_2_8
191 * @name: The name of the object
192 * @name_prefix: used for debugging
193 * @parent: this object's parent, weak ref
194 * @flags: use GST_OBJECT_IS_XXX macros to access the flags
196 * GStreamer base object class.
204 /*< public >*/ /* with LOCK */
205 GMutex *lock; /* object LOCK */
206 gchar *name; /* object name */
207 gchar *name_prefix; /* used for debugging */
208 GstObject *parent; /* this object's parent, weak ref */
212 gpointer _gst_reserved[GST_PADDING];
216 * GST_CLASS_GET_LOCK:
217 * @obj: a #GstObjectClass
219 * This macro will return the class lock used to protect deep_notify signal
220 * emission on thread-unsafe glib versions (glib < 2.8).
222 #define GST_CLASS_GET_LOCK(obj) (GST_OBJECT_CLASS_CAST(obj)->lock)
225 * @obj: a #GstObjectClass
229 #define GST_CLASS_LOCK(obj) (g_static_rec_mutex_lock(GST_CLASS_GET_LOCK(obj)))
232 * @obj: a #GstObjectClass
234 * Try to lock the class, returns TRUE if class could be locked.
236 #define GST_CLASS_TRYLOCK(obj) (g_static_rec_mutex_trylock(GST_CLASS_GET_LOCK(obj)))
239 * @obj: a #GstObjectClass
243 #define GST_CLASS_UNLOCK(obj) (g_static_rec_mutex_unlock(GST_CLASS_GET_LOCK(obj)))
248 * @signal_object: is used to signal to the whole class
249 * @save_thyself: xml serialisation
250 * @restore_thyself: xml de-serialisation
252 struct _GstObjectClass {
253 GObjectClass parent_class;
255 gchar *path_string_separator;
256 GObject *signal_object;
258 GStaticRecMutex *lock;
261 void (*parent_set) (GstObject *object, GstObject *parent);
262 void (*parent_unset) (GstObject *object, GstObject *parent);
263 void (*object_saved) (GstObject *object, xmlNodePtr parent);
264 void (*deep_notify) (GstObject *object, GstObject *orig, GParamSpec *pspec);
267 /* virtual methods for subclasses */
268 xmlNodePtr (*save_thyself) (GstObject *object, xmlNodePtr parent);
269 void (*restore_thyself) (GstObject *object, xmlNodePtr self);
272 gpointer _gst_reserved[GST_PADDING];
275 /* normal GObject stuff */
276 GType gst_object_get_type (void);
279 gboolean gst_object_set_name (GstObject *object, const gchar *name);
280 gchar* gst_object_get_name (GstObject *object);
281 void gst_object_set_name_prefix (GstObject *object, const gchar *name_prefix);
282 gchar* gst_object_get_name_prefix (GstObject *object);
284 /* parentage routines */
285 gboolean gst_object_set_parent (GstObject *object, GstObject *parent);
286 GstObject* gst_object_get_parent (GstObject *object);
287 void gst_object_unparent (GstObject *object);
288 gboolean gst_object_has_ancestor (GstObject *object, GstObject *ancestor);
290 void gst_object_default_deep_notify (GObject *object, GstObject *orig,
291 GParamSpec *pspec, gchar **excluded_props);
293 /* refcounting + life cycle */
294 gpointer gst_object_ref (gpointer object);
295 void gst_object_unref (gpointer object);
296 void gst_object_sink (gpointer object);
298 /* replace object pointer */
299 void gst_object_replace (GstObject **oldobj, GstObject *newobj);
301 /* printing out the 'path' of the object */
302 gchar * gst_object_get_path_string (GstObject *object);
305 gboolean gst_object_check_uniqueness (GList *list, const gchar *name);
308 #ifndef GST_DISABLE_LOADSAVE_REGISTRY
309 xmlNodePtr gst_object_save_thyself (GstObject *object, xmlNodePtr parent);
310 void gst_object_restore_thyself (GstObject *object, xmlNodePtr self);
312 #if defined _GNUC_ && _GNUC_ >= 3
313 #pragma GCC poison gst_object_save_thyself
314 #pragma GCC poison gst_object_restore_thyself
318 /* class signal stuff */
319 guint gst_class_signal_connect (GstObjectClass *klass,
324 #ifndef GST_DISABLE_LOADSAVE_REGISTRY
325 void gst_class_signal_emit_by_name (GstObject *object,
329 #if defined _GNUC_ && _GNUC_ >= 3
330 #pragma GCC poison gst_class_signal_emit_by_name
337 #endif /* __GST_OBJECT_H__ */