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gstreamer/gst/gstobject.h
Wim Taymans b43d8f1006 gst/: Backport HEAD changes, mostly docs. 
Original commit message from CVS:
* gst/gst_private.h:
* gst/gstbin.c: (gst_bin_get_by_name_recurse_up):
* gst/gstbuffer.h:
* gst/gstclock.c: (gst_clock_id_ref), (gst_clock_id_unref),
(gst_clock_id_compare_func), (gst_clock_id_wait),
(gst_clock_id_wait_async), (gst_clock_init),
(gst_clock_adjust_unlocked), (gst_clock_get_time):
* gst/gstclock.h:
* gst/gstelement.c: (gst_element_class_init),
(gst_element_get_random_pad), (gst_element_get_state_func),
(gst_element_lost_state):
* gst/gstelement.h:
* gst/gstelementfactory.c: (gst_element_register):
* gst/gstiterator.c:
* gst/gstobject.c: (gst_object_set_parent):
* gst/gstobject.h:
* gst/gstpad.c: (gst_pad_push), (gst_pad_pull_range),
(gst_pad_query):
* gst/gstpad.h:
* gst/gstplugin.h:
* gst/gstprobe.h:
* gst/parse/parse.l:
* gst/registries/gstxmlregistry.c: (gst_xml_registry_load):
Backport HEAD changes, mostly docs.
Fix possible deadlock in _get_random_pad.
2005-03-09 11:05:00 +00:00

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2005 Wim Taymans <wim@fluendo.com>
*
* gstobject.h: Header for base GstObject
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_OBJECT_H__
#define __GST_OBJECT_H__
#include <gst/gstconfig.h>
#include <glib-object.h> /* note that this gets wrapped in __GST_OBJECT_H__ */
#include <gst/gstatomic.h>
#include <gst/gsttypes.h>
G_BEGIN_DECLS
GST_EXPORT GType _gst_object_type;
#define GST_TYPE_OBJECT (_gst_object_type)
#define GST_IS_OBJECT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_OBJECT))
#define GST_IS_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_OBJECT))
#define GST_OBJECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_OBJECT, GstObjectClass))
#define GST_OBJECT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_OBJECT, GstObject))
#define GST_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_OBJECT, GstObjectClass))
#define GST_OBJECT_CAST(obj) ((GstObject*)(obj))
#define GST_OBJECT_CLASS_CAST(klass) ((GstObjectClass*)(klass))
/* make sure we don't change the object size but stil make it compile
* without libxml */
#ifdef GST_DISABLE_LOADSAVE_REGISTRY
#define xmlNodePtr gpointer
#endif
typedef enum
{
GST_OBJECT_DISPOSING = 0,
GST_OBJECT_DESTROYED = 1,
GST_OBJECT_FLOATING,
GST_OBJECT_FLAG_LAST = 4
} GstObjectFlags;
#define GST_OBJECT_REFCOUNT(caps) ((GST_OBJECT_CAST(caps))->refcount)
#define GST_OBJECT_REFCOUNT_VALUE(caps) (gst_atomic_int_read (&(GST_OBJECT_CAST(caps))->refcount))
/* we do a GST_OBJECT_CAST to avoid type checking, better call these
* function with a valid object! */
#define GST_LOCK(obj) (g_mutex_lock(GST_OBJECT_CAST(obj)->lock))
#define GST_TRYLOCK(obj) (g_mutex_trylock(GST_OBJECT_CAST(obj)->lock))
#define GST_UNLOCK(obj) (g_mutex_unlock(GST_OBJECT_CAST(obj)->lock))
#define GST_GET_LOCK(obj) (GST_OBJECT_CAST(obj)->lock)
#define GST_OBJECT_NAME(obj) (GST_OBJECT_CAST(obj)->name)
#define GST_OBJECT_PARENT(obj) (GST_OBJECT_CAST(obj)->parent)
/* for the flags we double-not to make them comparable to TRUE and FALSE */
#define GST_FLAGS(obj) (GST_OBJECT_CAST (obj)->flags)
#define GST_FLAG_IS_SET(obj,flag) (!!(GST_FLAGS (obj) & (1<<(flag))))
#define GST_FLAG_SET(obj,flag) G_STMT_START{ (GST_FLAGS (obj) |= (1<<(flag))); }G_STMT_END
#define GST_FLAG_UNSET(obj,flag) G_STMT_START{ (GST_FLAGS (obj) &= ~(1<<(flag))); }G_STMT_END
#define GST_OBJECT_IS_DISPOSING(obj) (GST_FLAG_IS_SET (obj, GST_OBJECT_DISPOSING))
#define GST_OBJECT_IS_DESTROYED(obj) (GST_FLAG_IS_SET (obj, GST_OBJECT_DESTROYED))
#define GST_OBJECT_IS_FLOATING(obj) (GST_FLAG_IS_SET (obj, GST_OBJECT_FLOATING))
struct _GstObject {
GObject object;
/*< public >*/
GstAtomicInt refcount;
/*< public >*/ /* with LOCK */
GMutex *lock; /* object LOCK */
gchar *name; /* object name */
gchar *name_prefix; /* used for debugging */
GstObject *parent; /* this object's parent, weak ref */
guint32 flags;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
#define GST_CLASS_LOCK(obj) (g_mutex_lock(GST_OBJECT_CLASS_CAST(obj)->lock))
#define GST_CLASS_TRYLOCK(obj) (g_mutex_trylock(GST_OBJECT_CLASS_CAST(obj)->lock))
#define GST_CLASS_UNLOCK(obj) (g_mutex_unlock(GST_OBJECT_CLASS_CAST(obj)->lock))
#define GST_CLASS_GET_LOCK(obj) (GST_OBJECT_CLASS_CAST(obj)->lock)
/* signal_object is used to signal to the whole class */
struct _GstObjectClass {
GObjectClass parent_class;
gchar *path_string_separator;
GObject *signal_object;
GMutex *lock;
/* signals */
void (*parent_set) (GstObject *object, GstObject *parent);
void (*parent_unset) (GstObject *object, GstObject *parent);
void (*object_saved) (GstObject *object, xmlNodePtr parent);
void (*deep_notify) (GstObject *object, GstObject *orig, GParamSpec *pspec);
/* vtable */
xmlNodePtr (*save_thyself) (GstObject *object, xmlNodePtr parent);
void (*restore_thyself) (GstObject *object, xmlNodePtr self);
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
/* normal GObject stuff */
GType gst_object_get_type (void);
/* name routines */
gboolean gst_object_set_name (GstObject *object, const gchar *name);
gchar* gst_object_get_name (GstObject *object);
void gst_object_set_name_prefix (GstObject *object, const gchar *name_prefix);
gchar* gst_object_get_name_prefix (GstObject *object);
/* parentage routines */
gboolean gst_object_set_parent (GstObject *object, GstObject *parent);
GstObject* gst_object_get_parent (GstObject *object);
void gst_object_unparent (GstObject *object);
void gst_object_default_deep_notify (GObject *object, GstObject *orig,
GParamSpec *pspec, gchar **excluded_props);
/* refcounting + life cycle */
GstObject * gst_object_ref (GstObject *object);
GstObject * gst_object_unref (GstObject *object);
void gst_object_sink (GstObject *object);
/* replace object pointer */
void gst_object_replace (GstObject **oldobj, GstObject *newobj);
/* printing out the 'path' of the object */
gchar * gst_object_get_path_string (GstObject *object);
/* misc utils */
gboolean gst_object_check_uniqueness (GList *list, const gchar *name);
/* load/save */
#ifndef GST_DISABLE_LOADSAVE_REGISTRY
xmlNodePtr gst_object_save_thyself (GstObject *object, xmlNodePtr parent);
void gst_object_restore_thyself (GstObject *object, xmlNodePtr self);
#else
#if defined _GNUC_ && _GNUC_ >= 3
#pragma GCC poison gst_object_save_thyself
#pragma GCC poison gst_object_restore_thyself
#endif
#endif
/* class signal stuff */
guint gst_class_signal_connect (GstObjectClass *klass,
const gchar *name,
gpointer func,
gpointer func_data);
#ifndef GST_DISABLE_LOADSAVE_REGISTRY
void gst_class_signal_emit_by_name (GstObject *object,
const gchar *name,
xmlNodePtr self);
#else
#if defined _GNUC_ && _GNUC_ >= 3
#pragma GCC poison gst_class_signal_emit_by_name
#endif
#endif
G_END_DECLS
#endif /* __GST_OBJECT_H__ */
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