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/* GLIB - Library of useful routines for C programming
* gdataset-private.h: Internal macros for accessing dataset values
* Copyright (C) 2005 Red Hat
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GLib Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GLib Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GLib at ftp://ftp.gtk.org/pub/gtk/.
*/
#ifndef __G_DATASETPRIVATE_H__
#define __G_DATASETPRIVATE_H__
#include <gatomic.h>
G_BEGIN_DECLS
/* GET_FLAGS is implemented via atomic pointer access, to allow memory
* barriers to take effect without acquiring the global dataset mutex.
*/
#define G_DATALIST_GET_FLAGS(datalist) \
((gsize) g_atomic_pointer_get (datalist) & G_DATALIST_FLAGS_MASK)
#define _G_DATALIST_LOCK_BIT 2
#define g_datalist_lock(datalist) \
G_STMT_START \
{ \
GData **const _datalist = (datalist); \
\
g_pointer_bit_lock ((void **) _datalist, _G_DATALIST_LOCK_BIT); \
} \
G_STMT_END
#define g_datalist_unlock(datalist) \
G_STMT_START \
{ \
GData **const _datalist = (datalist); \
\
g_pointer_bit_unlock ((void **) _datalist, _G_DATALIST_LOCK_BIT); \
} \
G_STMT_END
/*< private >
* GDataListUpdateAtomicFunc:
* @data: (inout) (nullable) (not optional): the existing data corresponding to
* the "key_id" parameter of g_datalist_id_update_atomic(), and return location
* for the new value for it
* @destroy_notify: (inout) (nullable) (not optional): the existing destroy
* notify function for @data, and return location for the destroy notify
* function for the new value for it
* @user_data: user data passed in to [func@GLib.datalist_id_update_atomic]
*
* Callback from [func@GLib.datalist_id_update_atomic].
*
* Since: 2.80
*/
typedef gpointer (*GDataListUpdateAtomicFunc) (gpointer *data,
GDestroyNotify *destroy_notify,
gpointer user_data);
gpointer g_datalist_id_update_atomic (GData **datalist,
GQuark key_id,
gboolean already_locked,
GDataListUpdateAtomicFunc callback,
gpointer user_data);
G_END_DECLS
#endif /* __G_DATASETPRIVATE_H__ */
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