| /* GNU Objective C Runtime 'fast enumeration' implementation |
| Copyright (C) 2010-2022 Free Software Foundation, Inc. |
| Contributed by Nicola Pero <nicola.pero@meta-innovation.com> |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under the |
| terms of the GNU General Public License as published by the Free Software |
| Foundation; either version 3, or (at your option) any later version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
| FOR A PARTICULAR PURPOSE. See the GNU General Public License for more |
| details. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* This file implements objc_enumeration_mutation() and |
| objc_set_enumeration_mutation_handler(), the two functions required |
| to handle mutations during a fast enumeration. */ |
| #include "objc-private/common.h" |
| #include "objc-private/error.h" /* For _objc_abort() */ |
| #include "objc/runtime.h" /* For objc_enumerationMutation() and objc_set_enumeration_mutation_handler() */ |
| |
| /* The enumeration mutation handler currently in use. */ |
| static void (*__objc_enumeration_mutation_handler)(id) = NULL; |
| |
| void |
| objc_setEnumerationMutationHandler (void (*handler)(id)) |
| { |
| __objc_enumeration_mutation_handler = handler; |
| } |
| |
| void |
| objc_enumerationMutation (id collection) |
| { |
| if (__objc_enumeration_mutation_handler != NULL) |
| (*__objc_enumeration_mutation_handler) (collection); |
| |
| /* We always abort if we get here; there is no point in going on as |
| the next iteration in the fast enumeration would probably go |
| deeply wrong. */ |
| _objc_abort ("Collection %p mutated during fast enumeration", collection); |
| } |