core: Add macros for local allocation

This is GCC-specific, but it makes the code significantly
cleaner.

src/libotutil/ot-local-alloc.h

@@ -0,0 +1,44 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
+ *
+ * Copyright (C) 2011 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.
+ *
+ * Author: Colin Walters <walters@verbum.org>
+ */
+
+#ifndef __OSTREE_LOCAL_ALLOC_H__
+#define __OSTREE_LOCAL_ALLOC_H__
+
+#include <gio/gio.h>
+
+G_BEGIN_DECLS
+
+void ot_local_free (void *loc);
+void ot_local_obj_unref (void *loc);
+void ot_local_variant_unref (void *loc);
+void ot_local_ptrarray_unref (void *loc);
+void ot_local_hashtable_unref (void *loc);
+
+#define ot_lfree __attribute__ ((cleanup(ot_local_free)))
+#define ot_lobj __attribute__ ((cleanup(ot_local_obj_unref)))
+#define ot_lvariant __attribute__ ((cleanup(ot_local_variant_unref)))
+#define ot_lptrarray __attribute__ ((cleanup(ot_local_ptrarray_unref)))
+#define ot_lhash __attribute__ ((cleanup(ot_local_hashtable_unref)))
+
+G_END_DECLS
+
+#endif