1258945Sroberto/*
2258945Sroberto * Copyright (C) 2004, 2007  Internet Systems Consortium, Inc. ("ISC")
3258945Sroberto * Copyright (C) 1999-2001  Internet Software Consortium.
4258945Sroberto *
5258945Sroberto * Permission to use, copy, modify, and/or distribute this software for any
6258945Sroberto * purpose with or without fee is hereby granted, provided that the above
7258945Sroberto * copyright notice and this permission notice appear in all copies.
8258945Sroberto *
9258945Sroberto * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10258945Sroberto * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11258945Sroberto * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12258945Sroberto * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13258945Sroberto * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14258945Sroberto * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15258945Sroberto * PERFORMANCE OF THIS SOFTWARE.
16258945Sroberto */
17258945Sroberto
18258945Sroberto/* $Id: once.h,v 1.9 2007/06/19 23:47:20 tbox Exp $ */
19258945Sroberto
20258945Sroberto#ifndef ISC_ONCE_H
21258945Sroberto#define ISC_ONCE_H 1
22258945Sroberto
23258945Sroberto#include <isc/lang.h>
24258945Sroberto#include <isc/result.h>
25258945Sroberto
26258945SrobertoISC_LANG_BEGINDECLS
27258945Sroberto
28258945Srobertotypedef struct {
29258945Sroberto	int status;
30258945Sroberto	LONG counter;
31258945Sroberto} isc_once_t;
32258945Sroberto
33258945Sroberto#define ISC_ONCE_INIT_NEEDED 0
34258945Sroberto#define ISC_ONCE_INIT_DONE 1
35258945Sroberto
36258945Sroberto#define ISC_ONCE_INIT { ISC_ONCE_INIT_NEEDED, 1 }
37258945Sroberto
38258945Srobertoisc_result_t
39258945Srobertoisc_once_do(isc_once_t *controller, void(*function)(void));
40258945Sroberto
41258945SrobertoISC_LANG_ENDDECLS
42258945Sroberto
43258945Sroberto#endif /* ISC_ONCE_H */
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