xref: /openssh-portable/atomicio.h (revision 0a843d9a)
1 /* $OpenBSD: atomicio.h,v 1.12 2018/12/27 03:25:25 djm Exp $ */
2 
3 /*
4  * Copyright (c) 2006 Damien Miller.  All rights reserved.
5  * Copyright (c) 1995,1999 Theo de Raadt.  All rights reserved.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #ifndef _ATOMICIO_H
30 #define _ATOMICIO_H
31 
32 struct iovec;
33 
34 /*
35  * Ensure all of data on socket comes through. f==read || f==vwrite
36  */
37 size_t
38 atomicio6(ssize_t (*f) (int, void *, size_t), int fd, void *_s, size_t n,
39     int (*cb)(void *, size_t), void *);
40 size_t	atomicio(ssize_t (*)(int, void *, size_t), int, void *, size_t);
41 
42 #define vwrite (ssize_t (*)(int, void *, size_t))write
43 
44 /*
45  * ensure all of data on socket comes through. f==readv || f==writev
46  */
47 size_t
48 atomiciov6(ssize_t (*f) (int, const struct iovec *, int), int fd,
49     const struct iovec *_iov, int iovcnt, int (*cb)(void *, size_t), void *);
50 size_t	atomiciov(ssize_t (*)(int, const struct iovec *, int),
51     int, const struct iovec *, int);
52 
53 #endif /* _ATOMICIO_H */
54