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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
 *
 * Copyright (C) 2012,2013 Colin Walters <walters@verbum.org>.
 *
 * 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 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, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifndef __LIBGSYSTEM_GLIB_COMPAT__
#define __LIBGSYSTEM_GLIB_COMPAT__

#include <gio/gio.h>

#if !GLIB_CHECK_VERSION(2,34,0)
static inline void
g_type_ensure (GType type)
{
  if (G_UNLIKELY (type == (GType)-1))
    g_error ("can't happen");
}

#define g_clear_pointer(pp, destroy)	  \
	G_STMT_START { \
		G_STATIC_ASSERT (sizeof *(pp) == sizeof (gpointer)); \
		/* Only one access, please */ \
		gpointer *_pp = (gpointer *) (pp); \
		gpointer _p; \
		/* This assignment is needed to avoid a gcc warning */ \
		GDestroyNotify _destroy = (GDestroyNotify) (destroy); \
	  \
		(void) (0 ? (gpointer) *(pp) : 0); \
		do \
			_p = g_atomic_pointer_get (_pp); \
		while G_UNLIKELY (!g_atomic_pointer_compare_and_exchange (_pp, _p, NULL)); \
	  \
		if (_p) \
			_destroy (_p); \
	} G_STMT_END

#endif

#endif