/*
- * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
- *
* This file is part of libFirm.
- *
- * This file may be distributed and/or modified under the terms of the
- * GNU General Public License version 2 as published by the Free Software
- * Foundation and appearing in the file LICENSE.GPL included in the
- * packaging of this file.
- *
- * Licensees holding valid libFirm Professional Edition licenses may use
- * this file in accordance with the libFirm Commercial License.
- * Agreement provided with the Software.
- *
- * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
- * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE.
+ * Copyright (C) 2012 University of Karlsruhe.
*/
/**
* @file
* @brief Generic hooks for various libFirm functions.
* @author Michael Beck
- * @version $Id$
*/
#include "config.h"
+#include <assert.h>
+
#include "irhooks.h"
-/* the hooks */
hook_entry_t *hooks[hook_last];
-/* register a hook */
void register_hook(hook_type_t hook, hook_entry_t *entry)
{
/* check if a hook function is specified. It's a union, so no matter which one */
if (! entry->hook._hook_turn_into_id)
return;
+ /* hook should not be registered yet */
+ assert(entry->next == NULL && hooks[hook] != entry);
+
entry->next = hooks[hook];
hooks[hook] = entry;
}
-/* unregister a hook */
void unregister_hook(hook_type_t hook, hook_entry_t *entry)
{
hook_entry_t *p;
return;
}
- for (p = hooks[hook]; p && p->next != entry; p = p->next);
+ for (p = hooks[hook]; p && p->next != entry; p = p->next) {
+ }
if (p) {
p->next = entry->next;