1*e4b17023SJohn Marino /* GNU Objective C Runtime 'fast enumeration' implementation 2*e4b17023SJohn Marino Copyright (C) 2010 Free Software Foundation, Inc. 3*e4b17023SJohn Marino Contributed by Nicola Pero <nicola.pero@meta-innovation.com> 4*e4b17023SJohn Marino 5*e4b17023SJohn Marino This file is part of GCC. 6*e4b17023SJohn Marino 7*e4b17023SJohn Marino GCC is free software; you can redistribute it and/or modify it under the 8*e4b17023SJohn Marino terms of the GNU General Public License as published by the Free Software 9*e4b17023SJohn Marino Foundation; either version 3, or (at your option) any later version. 10*e4b17023SJohn Marino 11*e4b17023SJohn Marino GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12*e4b17023SJohn Marino WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 13*e4b17023SJohn Marino FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 14*e4b17023SJohn Marino details. 15*e4b17023SJohn Marino 16*e4b17023SJohn Marino Under Section 7 of GPL version 3, you are granted additional 17*e4b17023SJohn Marino permissions described in the GCC Runtime Library Exception, version 18*e4b17023SJohn Marino 3.1, as published by the Free Software Foundation. 19*e4b17023SJohn Marino 20*e4b17023SJohn Marino You should have received a copy of the GNU General Public License and 21*e4b17023SJohn Marino a copy of the GCC Runtime Library Exception along with this program; 22*e4b17023SJohn Marino see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23*e4b17023SJohn Marino <http://www.gnu.org/licenses/>. */ 24*e4b17023SJohn Marino 25*e4b17023SJohn Marino /* This file implements objc_enumeration_mutation() and 26*e4b17023SJohn Marino objc_set_enumeration_mutation_handler(), the two functions required 27*e4b17023SJohn Marino to handle mutations during a fast enumeration. */ 28*e4b17023SJohn Marino #include "objc-private/common.h" 29*e4b17023SJohn Marino #include "objc-private/error.h" /* For _objc_abort() */ 30*e4b17023SJohn Marino #include "objc/runtime.h" /* For objc_enumerationMutation() and objc_set_enumeration_mutation_handler() */ 31*e4b17023SJohn Marino 32*e4b17023SJohn Marino /* The enumeration mutation handler currently in use. */ 33*e4b17023SJohn Marino static void (*__objc_enumeration_mutation_handler)(id) = NULL; 34*e4b17023SJohn Marino 35*e4b17023SJohn Marino void objc_setEnumerationMutationHandler(void (* handler)(id))36*e4b17023SJohn Marinoobjc_setEnumerationMutationHandler (void (*handler)(id)) 37*e4b17023SJohn Marino { 38*e4b17023SJohn Marino __objc_enumeration_mutation_handler = handler; 39*e4b17023SJohn Marino } 40*e4b17023SJohn Marino 41*e4b17023SJohn Marino void objc_enumerationMutation(id collection)42*e4b17023SJohn Marinoobjc_enumerationMutation (id collection) 43*e4b17023SJohn Marino { 44*e4b17023SJohn Marino if (__objc_enumeration_mutation_handler != NULL) 45*e4b17023SJohn Marino (*__objc_enumeration_mutation_handler) (collection); 46*e4b17023SJohn Marino 47*e4b17023SJohn Marino /* We always abort if we get here; there is no point in going on as 48*e4b17023SJohn Marino the next iteration in the fast enumeration would probably go 49*e4b17023SJohn Marino deeply wrong. */ 50*e4b17023SJohn Marino _objc_abort ("Collection %p mutated during fast enumeration", collection); 51*e4b17023SJohn Marino } 52