/*
- * Project: libFIRM
- * File name: ir/ir/irhooks.c
- * Purpose: Generic hooks for various libFirm functions.
- * Author: Michael Beck
- * Created:
- * CVS-ID: $Id$
- * Copyright: (C) 1998-2005 Universität Karlsruhe
- * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ * 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.
*/
/**
- * @file irhooks.c
- *
- * Generic hooks for various libFirm functions.
- *
- * @author Michael Beck
+ * @file
+ * @brief Generic hooks for various libFirm functions.
+ * @author Michael Beck
+ * @version $Id$
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
/* 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;
hooks[hook] = entry;
}
+/* unregister a hook */
+void unregister_hook(hook_type_t hook, hook_entry_t *entry) {
+ hook_entry_t *p;
+
+ if (hooks[hook] == entry) {
+ hooks[hook] = entry->next;
+ entry->next = NULL;
+ return;
+ }
+
+ for (p = hooks[hook]; p && p->next != entry; p = p->next);
+
+ if (p) {
+ p->next = entry->next;
+ entry->next = NULL;
+ }
+}
+
+
#else
void register_hook(hook_type_t hook, hook_entry_t *entry) {}
+void unregister_hook(hook_type_t hook, hook_entry_t *entry) {}
#endif /* FIRM_ENABLE_HOOKS */
-int init_hooks(void)
-{
- return (int)register_hook;
+int firm_init_hooks(void) {
+ /* this strange code assures that both functions are available
+ in a shared library even if none of them is called.
+ Meanwhile not needed anymore but ... */
+ return (int)register_hook + (int)unregister_hook;
}