/*
- * 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"
-#endif
-#include "irhooks.h"
+#include <assert.h>
-#ifdef FIRM_ENABLE_HOOKS
+#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) {
+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) {
+void unregister_hook(hook_type_t hook, hook_entry_t *entry)
+{
hook_entry_t *p;
if (hooks[hook] == entry) {
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;
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 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;
-}