1 /* 2 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 3 * 4 * SPDX-License-Identifier: MPL-2.0 5 * 6 * This Source Code Form is subject to the terms of the Mozilla Public 7 * License, v. 2.0. If a copy of the MPL was not distributed with this 8 * file, you can obtain one at https://mozilla.org/MPL/2.0/. 9 * 10 * See the COPYRIGHT file distributed with this work for additional 11 * information regarding copyright ownership. 12 */ 13 14 #ifndef ISC_ONCE_H 15 #define ISC_ONCE_H 1 16 17 #include <isc/lang.h> 18 #include <isc/result.h> 19 20 ISC_LANG_BEGINDECLS 21 22 typedef struct { 23 int status; 24 int counter; 25 } isc_once_t; 26 27 #define ISC_ONCE_INIT_NEEDED 0 28 #define ISC_ONCE_INIT_DONE 1 29 30 #define ISC_ONCE_INIT \ 31 { \ 32 ISC_ONCE_INIT_NEEDED, 1 \ 33 } 34 35 isc_result_t 36 isc_once_do(isc_once_t *controller, void (*function)(void)); 37 38 ISC_LANG_ENDDECLS 39 40 #endif /* ISC_ONCE_H */ 41