2 * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * File name: ir/ir/irhooks.c
23 * Purpose: Generic hooks for various libFirm functions.
24 * Author: Michael Beck
27 * Copyright: (C) 1998-2005 Universität Karlsruhe
33 * Generic hooks for various libFirm functions.
35 * @author Michael Beck
43 #ifdef FIRM_ENABLE_HOOKS
46 hook_entry_t *hooks[hook_last];
49 void register_hook(hook_type_t hook, hook_entry_t *entry) {
50 /* check if a hook function is specified. It's a union, so no matter which one */
51 if (! entry->hook._hook_turn_into_id)
54 entry->next = hooks[hook];
58 /* unregister a hook */
59 void unregister_hook(hook_type_t hook, hook_entry_t *entry) {
62 if (hooks[hook] == entry) {
63 hooks[hook] = entry->next;
68 for (p = hooks[hook]; p && p->next != entry; p = p->next);
71 p->next = entry->next;
79 void register_hook(hook_type_t hook, hook_entry_t *entry) {}
80 void unregister_hook(hook_type_t hook, hook_entry_t *entry) {}
82 #endif /* FIRM_ENABLE_HOOKS */
84 int firm_init_hooks(void) {
85 /* this strange code assures that both functions are available
86 in a shared library even if none of them is called.
87 Meanwhile not needed anymore but ... */
88 return (int)register_hook + (int)unregister_hook;