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Diffstat (limited to 'src/gsystem-glib-compat.h')
| -rw-r--r-- | src/gsystem-glib-compat.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/gsystem-glib-compat.h b/src/gsystem-glib-compat.h new file mode 100644 index 0000000..6fd59c6 --- /dev/null +++ b/src/gsystem-glib-compat.h @@ -0,0 +1,54 @@ +/* -*- 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 |