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gstreamer/gst/gstobject.h
Peter Kjellerstedt 2a19cd8c49 gst/gstobject.h: Don't define xmlNodePtr to gpointer if the core was built with 
Original commit message from CVS:
Patch by: Peter Kjellerstedt <pkj at axis com>
* gst/gstobject.h:
Don't define xmlNodePtr to gpointer if the core was built with
--disable-loadsave and --disable-registry, this will break
applications that want to use libxml2 but are buildling against a
core that doesn't use libxml2. Use an intermediary type GstXmlNodePtr
instead so we don't have to mess with the libxml2 namespace
(#361675).
2006-10-17 11:57:32 +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>
G_BEGIN_DECLS
#define GST_TYPE_OBJECT (gst_object_get_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 still make it compile
* without libxml */
#ifdef GST_DISABLE_LOADSAVE_REGISTRY
#define GstXmlNodePtr gpointer
#else
#define GstXmlNodePtr xmlNodePtr
#endif
/**
* GstObjectFlags:
* @GST_OBJECT_DISPOSING: the object is been destroyed, do use it anymore
* @GST_OBJECT_FLOATING: the object has a floating reference count (e.g. its
* not assigned to a bin)
* @GST_OBJECT_FLAG_LAST: subclasses can add additional flags starting from this flag
*
* The standard flags that an gstobject may have.
*/
typedef enum
{
GST_OBJECT_DISPOSING = (1<<0),
GST_OBJECT_FLOATING = (1<<1),
/* padding */
GST_OBJECT_FLAG_LAST = (1<<4)
} GstObjectFlags;
/**
* GST_OBJECT_REFCOUNT:
* @obj: a #GstObject
*
* Get access to the reference count field of the object.
*/
#define GST_OBJECT_REFCOUNT(obj) (((GObject*)(obj))->ref_count)
/**
* GST_OBJECT_REFCOUNT_VALUE:
* @obj: a #GstObject
*
* Get the reference count value of the object.
*/
#define GST_OBJECT_REFCOUNT_VALUE(obj) g_atomic_int_get ((gint *) &GST_OBJECT_REFCOUNT(obj))
/* we do a GST_OBJECT_CAST to avoid type checking, better call these
* function with a valid object! */
/**
* GST_OBJECT_GET_LOCK:
* @obj: a #GstObject
*
* Acquire a reference to the mutex of this object.
*/
#define GST_OBJECT_GET_LOCK(obj) (GST_OBJECT_CAST(obj)->lock)
/**
* GST_OBJECT_LOCK:
* @obj: a #GstObject to lock
*
* This macro will obtain a lock on the object, making serialization possible.
* It blocks until the lock can be obtained.
*/
#define GST_OBJECT_LOCK(obj) g_mutex_lock(GST_OBJECT_GET_LOCK(obj))
/**
* GST_OBJECT_TRYLOCK:
* @obj: a #Object.
*
* This macro will try to obtain a lock on the object, but will return with
* FALSE if it can't get it immediately.
*/
#define GST_OBJECT_TRYLOCK(obj) g_mutex_trylock(GST_OBJECT_GET_LOCK(obj))
/**
* GST_OBJECT_UNLOCK:
* @obj: a #GstObject to unlock.
*
* This macro releases a lock on the object.
*/
#define GST_OBJECT_UNLOCK(obj) g_mutex_unlock(GST_OBJECT_GET_LOCK(obj))
/**
* GST_OBJECT_NAME:
* @obj: a #GstObject
*
* Get the name of this object
*/
#define GST_OBJECT_NAME(obj) (GST_OBJECT_CAST(obj)->name)
/**
* GST_OBJECT_PARENT:
* @obj: a #GstObject
*
* Get the parent of this object
*/
#define GST_OBJECT_PARENT(obj) (GST_OBJECT_CAST(obj)->parent)
/**
* GST_OBJECT_FLAGS:
* @obj: a #GstObject
*
* This macro returns the entire set of flags for the object.
*/
#define GST_OBJECT_FLAGS(obj) (GST_OBJECT_CAST (obj)->flags)
/**
* GST_OBJECT_FLAG_IS_SET:
* @obj: a #GstObject
* @flag: Flag to check for
*
* This macro checks to see if the given flag is set.
*/
#define GST_OBJECT_FLAG_IS_SET(obj,flag) ((GST_OBJECT_FLAGS (obj) & (flag)) == (flag))
/**
* GST_OBJECT_FLAG_SET:
* @obj: a #GstObject
* @flag: Flag to set
*
* This macro sets the given bits.
*/
#define GST_OBJECT_FLAG_SET(obj,flag) (GST_OBJECT_FLAGS (obj) |= (flag))
/**
* GST_OBJECT_FLAG_UNSET:
* @obj: a #GstObject
* @flag: Flag to set
*
* This macro usets the given bits.
*/
#define GST_OBJECT_FLAG_UNSET(obj,flag) (GST_OBJECT_FLAGS (obj) &= ~(flag))
/**
* GST_OBJECT_IS_DISPOSING:
* @obj: a #GstObject
*
* Check if the given object is beeing destroyed.
*/
#define GST_OBJECT_IS_DISPOSING(obj) (GST_OBJECT_FLAG_IS_SET (obj, GST_OBJECT_DISPOSING))
/**
* GST_OBJECT_IS_FLOATING:
* @obj: a #GstObject
*
* Check if the given object is floating (has no owner).
*/
#define GST_OBJECT_IS_FLOATING(obj) (GST_OBJECT_FLAG_IS_SET (obj, GST_OBJECT_FLOATING))
typedef struct _GstObject GstObject;
typedef struct _GstObjectClass GstObjectClass;
/**
* GstObject:
* @refcount: unused
* @lock: object LOCK
* @name: The name of the object
* @name_prefix: used for debugging
* @parent: this object's parent, weak ref
* @flags: use GST_OBJECT_IS_XXX macros to access the flags
*
* GStreamer base object class.
*/
struct _GstObject {
GObject object;
/*< public >*/
gint 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_CLASS_GET_LOCK:
* @obj: a #GstObjectClass
*
* This macro will return the class lock used to protect deep_notify signal
* emission on thread-unsafe glib versions (glib < 2.8).
*/
#define GST_CLASS_GET_LOCK(obj) (GST_OBJECT_CLASS_CAST(obj)->lock)
/**
* GST_CLASS_LOCK:
* @obj: a #GstObjectClass
*
* Lock the class.
*/
#define GST_CLASS_LOCK(obj) (g_static_rec_mutex_lock(GST_CLASS_GET_LOCK(obj)))
/**
* GST_CLASS_TRYLOCK:
* @obj: a #GstObjectClass
*
* Try to lock the class, returns TRUE if class could be locked.
*/
#define GST_CLASS_TRYLOCK(obj) (g_static_rec_mutex_trylock(GST_CLASS_GET_LOCK(obj)))
/**
* GST_CLASS_UNLOCK:
* @obj: a #GstObjectClass
*
* Unlock the class.
*/
#define GST_CLASS_UNLOCK(obj) (g_static_rec_mutex_unlock(GST_CLASS_GET_LOCK(obj)))
/*
* GstObjectClass:
*
* @signal_object: is used to signal to the whole class
* @save_thyself: xml serialisation
* @restore_thyself: xml de-serialisation
*/
struct _GstObjectClass {
GObjectClass parent_class;
gchar *path_string_separator;
GObject *signal_object;
GStaticRecMutex *lock;
/* signals */
void (*parent_set) (GstObject * object, GstObject * parent);
void (*parent_unset) (GstObject * object, GstObject * parent);
void (*object_saved) (GstObject * object, GstXmlNodePtr parent);
void (*deep_notify) (GstObject * object, GstObject * orig, GParamSpec * pspec);
/*< public >*/
/* virtual methods for subclasses */
GstXmlNodePtr (*save_thyself) (GstObject * object, GstXmlNodePtr parent);
void (*restore_thyself) (GstObject * object, GstXmlNodePtr 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);
gboolean gst_object_has_ancestor (GstObject *object, GstObject *ancestor);
void gst_object_default_deep_notify (GObject *object, GstObject *orig,
GParamSpec *pspec, gchar **excluded_props);
/* refcounting + life cycle */
gpointer gst_object_ref (gpointer object);
void gst_object_unref (gpointer object);
void gst_object_sink (gpointer 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
GstXmlNodePtr gst_object_save_thyself (GstObject *object, GstXmlNodePtr parent);
void gst_object_restore_thyself (GstObject *object, GstXmlNodePtr 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,
GstXmlNodePtr 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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