glib/gdatasetprivate.h

   1 /* GLIB - Library of useful routines for C programming
   2  * gdataset-private.h: Internal macros for accessing dataset values
   3  * Copyright (C) 2005  Red Hat
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 /*
  20  * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
  21  * file for a list of people on the GLib Team.  See the ChangeLog
  22  * files for a list of changes.  These files are distributed with
  23  * GLib at ftp://ftp.gtk.org/pub/gtk/.
  24  */
  25
  26 #ifndef __G_DATASETPRIVATE_H__
  27 #define __G_DATASETPRIVATE_H__
  28
  29 #include <gatomic.h>
  30
  31 G_BEGIN_DECLS
  32
  33 /* GET_FLAGS is implemented via atomic pointer access, to allow memory
  34  * barriers to take effect without acquiring the global dataset mutex.
  35  */
  36 #define G_DATALIST_GET_FLAGS(datalist)                          \
  37   ((gsize) g_atomic_pointer_get (datalist) & G_DATALIST_FLAGS_MASK)
  38
  39
  40 G_END_DECLS
  41
  42 #endif /* __G_DATASETPRIVATE_H__ */