/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000 Wim Taymans * 2005 Wim Taymans * * 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 #include 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)) /** * GstObjectFlags: * @GST_OBJECT_FLAG_LAST: subclasses can add additional flags starting from this flag * * The standard flags that an gstobject may have. */ typedef enum { /* 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 #GstObject. * * 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)) typedef struct _GstObject GstObject; typedef struct _GstObjectClass GstObjectClass; /** * GstObject: * @lock: object LOCK * @name: The name of the object * @parent: this object's parent, weak ref * @flags: flags for this object * * GStreamer base object class. */ struct _GstObject { GInitiallyUnowned object; /*< public >*/ /* with LOCK */ GMutex *lock; /* object LOCK */ gchar *name; /* object name */ GstObject *parent; /* this object's parent, weak ref */ guint32 flags; /*< private >*/ gpointer _gst_reserved; }; /** * GstObjectClass: * @parent_class: parent * @path_string_separator: separator used by gst_object_get_path_string() * @deep_notify: default signal handler * * GStreamer base object class. */ struct _GstObjectClass { GInitiallyUnownedClass parent_class; const gchar *path_string_separator; /* signals */ void (*deep_notify) (GstObject * object, GstObject * orig, GParamSpec * pspec); /*< public >*/ /* virtual methods for subclasses */ /*< 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); /* 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); gpointer gst_object_ref_sink (gpointer object); /* replace object pointer */ gboolean 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); G_END_DECLS #endif /* __GST_OBJECT_H__ */