X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firhooks.c;h=e5b6bcf9a2dabffdf5c3198443524238191d9157;hb=7719bf6a7bd442f4763731d56d856cb082156877;hp=0341f7de8d0ae26eb8cc15a1e5d284ae170991f6;hpb=5acca50aee7818fe32a6c0476579b6b568a11b20;p=libfirm

diff --git a/ir/ir/irhooks.c b/ir/ir/irhooks.c
index 0341f7de8..e5b6bcf9a 100644
--- a/ir/ir/irhooks.c
+++ b/ir/ir/irhooks.c
@@ -1,34 +1,39 @@
 /*
- * 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"
 
-#ifdef FIRM_ENABLE_HOOKS
-
 /* 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;
 
@@ -36,8 +41,21 @@ void register_hook(hook_type_t hook, hook_entry_t *entry) {
   hooks[hook] = entry;
 }
 
-#else
+/* unregister a hook */
+void unregister_hook(hook_type_t hook, hook_entry_t *entry)
+{
+  hook_entry_t *p;
 
-void register_hook(hook_type_t hook, hook_entry_t *entry) {}
+  if (hooks[hook] == entry) {
+    hooks[hook] = entry->next;
+    entry->next = NULL;
+    return;
+  }
 
-#endif /* FIRM_ENABLE_HOOKS */
+  for (p = hooks[hook]; p && p->next != entry; p = p->next);
+
+  if (p) {
+    p->next     = entry->next;
+    entry->next = NULL;
+  }
+}