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f05b9d93 NP |
1 | /* GNU Objective C Runtime 'fast enumeration' implementation |
2 | Copyright (C) 2010 Free Software Foundation, Inc. | |
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 | /* | |
26 | This file implements objc_enumeration_mutation() and | |
27 | objc_set_enumeration_mutation_handler(), the two functions required | |
28 | to handle mutations during a fast enumeration. | |
29 | */ | |
cf3822f1 | 30 | #include "objc-private/common.h" |
f05b9d93 | 31 | #include "objc-private/error.h" /* For _objc_abort() */ |
cf3822f1 | 32 | #include "objc/runtime.h" /* For objc_enumerationMutation() and objc_set_enumeration_mutation_handler() */ |
f05b9d93 NP |
33 | |
34 | /* The enumeration mutation handler currently in use. */ | |
35 | static void (*__objc_enumeration_mutation_handler)(id) = NULL; | |
36 | ||
37 | void | |
2461ab4b | 38 | objc_setEnumerationMutationHandler (void (*handler)(id)) |
f05b9d93 NP |
39 | { |
40 | __objc_enumeration_mutation_handler = handler; | |
41 | } | |
42 | ||
43 | void | |
44 | objc_enumerationMutation (id collection) | |
45 | { | |
46 | if (__objc_enumeration_mutation_handler != NULL) | |
47 | (*__objc_enumeration_mutation_handler) (collection); | |
48 | ||
49 | /* We always abort if we get here; there is no point in going on as | |
50 | the next iteration in the fast enumeration would probably go | |
51 | deeply wrong. */ | |
52 | _objc_abort ("Collection %p mutated during fast enumeration", collection); | |
53 | } |