1 /*
2  * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
3  *
4  * This Source Code Form is subject to the terms of the Mozilla Public
5  * License, v. 2.0. If a copy of the MPL was not distributed with this
6  * file, you can obtain one at https://mozilla.org/MPL/2.0/.
7  *
8  * See the COPYRIGHT file distributed with this work for additional
9  * information regarding copyright ownership.
10  */
11 
12 #ifndef ISC_ONCE_H
13 #define ISC_ONCE_H 1
14 
15 /*! \file */
16 
17 #include <pthread.h>
18 
19 #include <isc/result.h>
20 
21 typedef pthread_once_t isc_once_t;
22 
23 #define ISC_ONCE_INIT PTHREAD_ONCE_INIT
24 
25 /* XXX We could do fancier error handling... */
26 
27 #define isc_once_do(op, f) \
28 	((pthread_once((op), (f)) == 0) ? ISC_R_SUCCESS : ISC_R_UNEXPECTED)
29 
30 #endif /* ISC_ONCE_H */
31