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/* 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); }
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