/* 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 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 still make it compile * without libxml */ #ifdef GST_DISABLE_LOADSAVE_REGISTRY #define xmlNodePtr gpointer #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 = 0, GST_OBJECT_FLOATING, GST_OBJECT_FLAG_LAST = 4 } GstObjectFlags; #ifdef GST_HAVE_GLIB_2_8 /** * GST_OBJECT_REFCOUNT: * @obj: Object get the refcount for. * * Get access to the reference count field of the object. */ #define GST_OBJECT_REFCOUNT(obj) (((GObject*)(obj))->ref_count) /** * GST_OBJECT_REFCOUNT_VALUE: * @obj: Object get the refcount value for. * * Get the reference count value of the object. */ #define GST_OBJECT_REFCOUNT_VALUE(obj) GST_OBJECT_REFCOUNT(obj) #else #define GST_OBJECT_REFCOUNT(obj) ((GST_OBJECT_CAST(obj))->refcount) #define GST_OBJECT_REFCOUNT_VALUE(obj) (g_atomic_int_get (&(GST_OBJECT_CAST(obj))->refcount)) #endif /* GST_HAVE_GLIB_2_8 */ /* we do a GST_OBJECT_CAST to avoid type checking, better call these * function with a valid object! */ /** * GST_LOCK: * @obj: Object to lock. * * This macro will obtain a lock on the object, making serialization possible. * It block until the lock can be obtained. */ #define GST_LOCK(obj) g_mutex_lock(GST_OBJECT_CAST(obj)->lock) /** * GST_TRYLOCK: * @obj: Object to try to get a lock on. * * 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_TRYLOCK(obj) g_mutex_trylock(GST_OBJECT_CAST(obj)->lock) /** * GST_LOCK: * @obj: Object to unlock. * * This macro releases a lock on the object. */ #define GST_UNLOCK(obj) g_mutex_unlock(GST_OBJECT_CAST(obj)->lock) /** * GST_LOCK: * @obj: Object to get the mutex of. * * Acquire a reference to the mutex of this object. */ #define GST_GET_LOCK(obj) (GST_OBJECT_CAST(obj)->lock) /** * GST_OBJECT_NAME: * @obj: Object to get the name of. * * Get the name of this object */ #define GST_OBJECT_NAME(obj) (GST_OBJECT_CAST(obj)->name) /** * GST_OBJECT_PARENT: * @obj: Object to get the parent of. * * Get the parent of this object */ #define GST_OBJECT_PARENT(obj) (GST_OBJECT_CAST(obj)->parent) /** * GST_FLAGS: * @obj: Object to return flags for. * * This macro returns the entire set of flags for the object. */ #define GST_FLAGS(obj) (GST_OBJECT_CAST (obj)->flags) /* for the flags we double-not to make them comparable to TRUE and FALSE */ /** * GST_FLAG_IS_SET: * @obj: Object to check for flags. * @flag: Flag to check for, must be a single bit in guint32. * * This macro checks to see if the given flag is set. */ #define GST_FLAG_IS_SET(obj,flag) (!!(GST_FLAGS (obj) & (1<<(flag)))) /** * GST_FLAG_SET: * @obj: Object to set flag in. * @flag: Flag to set, can by any number of bits in guint32. * * This macro sets the given bits. */ #define GST_FLAG_SET(obj,flag) (GST_FLAGS (obj) |= (1<<(flag))) /** * GST_FLAG_UNSET: * @obj: Object to unset flag in. * @flag: Flag to set, must be a single bit in guint32. * * This macro usets the given bits. */ #define GST_FLAG_UNSET(obj,flag) (GST_FLAGS (obj) &= ~(1<<(flag))) /** * GST_OBJECT_IS_DISPOSING: * @obj: Object to check * * Check if the given object is beeing destroyed. */ #define GST_OBJECT_IS_DISPOSING(obj) (GST_FLAG_IS_SET (obj, GST_OBJECT_DISPOSING)) /** * GST_OBJECT_IS_FLOATING: * @obj:Object to check * * Check if the given object is floating (has no owner). */ #define GST_OBJECT_IS_FLOATING(obj) (GST_FLAG_IS_SET (obj, GST_OBJECT_FLOATING)) typedef struct _GstObject GstObject; typedef struct _GstObjectClass GstObjectClass; /** * GstObject: * @refcount: only used ifndef GST_HAVE_GLIB_2_8 * @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_PADDING]; }; #define GST_CLASS_LOCK(obj) (g_static_rec_mutex_lock(GST_OBJECT_CLASS_CAST(obj)->lock)) #define GST_CLASS_TRYLOCK(obj) (g_static_rec_mutex_trylock(GST_OBJECT_CLASS_CAST(obj)->lock)) #define GST_CLASS_UNLOCK(obj) (g_static_rec_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; GStaticRecMutex *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); 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 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__ */