|
111
|
1 /* GNU Objective C Runtime 'fast enumeration' implementation
|
|
145
|
2 Copyright (C) 2010-2020 Free Software Foundation, Inc.
|
|
111
|
3 Contributed by Nicola Pero <nicola.pero@meta-innovation.com>
|
|
|
4
|
|
|
5 This file is part of GCC.
|
|
|
6
|
|
|
7 GCC is free software; you can redistribute it and/or modify it under the
|
|
|
8 terms of the GNU General Public License as published by the Free Software
|
|
|
9 Foundation; either version 3, or (at your option) any later version.
|
|
|
10
|
|
|
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
|
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
|
13 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
|
|
14 details.
|
|
|
15
|
|
|
16 Under Section 7 of GPL version 3, you are granted additional
|
|
|
17 permissions described in the GCC Runtime Library Exception, version
|
|
|
18 3.1, as published by the Free Software Foundation.
|
|
|
19
|
|
|
20 You should have received a copy of the GNU General Public License and
|
|
|
21 a copy of the GCC Runtime Library Exception along with this program;
|
|
|
22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
|
23 <http://www.gnu.org/licenses/>. */
|
|
|
24
|
|
|
25 /* This file implements objc_enumeration_mutation() and
|
|
|
26 objc_set_enumeration_mutation_handler(), the two functions required
|
|
|
27 to handle mutations during a fast enumeration. */
|
|
|
28 #include "objc-private/common.h"
|
|
|
29 #include "objc-private/error.h" /* For _objc_abort() */
|
|
|
30 #include "objc/runtime.h" /* For objc_enumerationMutation() and objc_set_enumeration_mutation_handler() */
|
|
|
31
|
|
|
32 /* The enumeration mutation handler currently in use. */
|
|
|
33 static void (*__objc_enumeration_mutation_handler)(id) = NULL;
|
|
|
34
|
|
|
35 void
|
|
|
36 objc_setEnumerationMutationHandler (void (*handler)(id))
|
|
|
37 {
|
|
|
38 __objc_enumeration_mutation_handler = handler;
|
|
|
39 }
|
|
|
40
|
|
|
41 void
|
|
|
42 objc_enumerationMutation (id collection)
|
|
|
43 {
|
|
|
44 if (__objc_enumeration_mutation_handler != NULL)
|
|
|
45 (*__objc_enumeration_mutation_handler) (collection);
|
|
|
46
|
|
|
47 /* We always abort if we get here; there is no point in going on as
|
|
|
48 the next iteration in the fast enumeration would probably go
|
|
|
49 deeply wrong. */
|
|
|
50 _objc_abort ("Collection %p mutated during fast enumeration", collection);
|
|
|
51 }
|
