1 /* $NetBSD: once.h,v 1.4 2014/12/10 04:38:01 christos Exp $ */ 2 3 /* 4 * Copyright (C) 2004, 2007 Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (C) 1999-2001 Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /* Id: once.h,v 1.9 2007/06/19 23:47:20 tbox Exp */ 21 22 #ifndef ISC_ONCE_H 23 #define ISC_ONCE_H 1 24 25 #include <isc/lang.h> 26 #include <isc/result.h> 27 28 ISC_LANG_BEGINDECLS 29 30 typedef struct { 31 int status; 32 int counter; 33 } isc_once_t; 34 35 #define ISC_ONCE_INIT_NEEDED 0 36 #define ISC_ONCE_INIT_DONE 1 37 38 #define ISC_ONCE_INIT { ISC_ONCE_INIT_NEEDED, 1 } 39 40 isc_result_t 41 isc_once_do(isc_once_t *controller, void(*function)(void)); 42 43 ISC_LANG_ENDDECLS 44 45 #endif /* ISC_ONCE_H */ 46