Annotation of sys/sys/uio.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: uio.h,v 1.13 2005/12/13 00:35:23 millert Exp $ */
2: /* $NetBSD: uio.h,v 1.12 1996/02/09 18:25:45 christos Exp $ */
3:
4: /*
5: * Copyright (c) 1982, 1986, 1993, 1994
6: * The Regents of the University of California. 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: * 3. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: *
32: * @(#)uio.h 8.5 (Berkeley) 2/22/94
33: */
34:
35: #ifndef _SYS_UIO_H_
36: #define _SYS_UIO_H_
37:
38: struct iovec {
39: void *iov_base; /* Base address. */
40: size_t iov_len; /* Length. */
41: };
42:
43: enum uio_rw { UIO_READ, UIO_WRITE };
44:
45: /* Segment flag values. */
46: enum uio_seg {
47: UIO_USERSPACE, /* from user data space */
48: UIO_SYSSPACE /* from system space */
49: };
50:
51: #ifdef _KERNEL
52: struct uio {
53: struct iovec *uio_iov; /* pointer to array of iovecs */
54: int uio_iovcnt; /* number of iovecs in array */
55: off_t uio_offset; /* offset into file this uio corresponds to */
56: size_t uio_resid; /* residual i/o count */
57: enum uio_seg uio_segflg; /* see above */
58: enum uio_rw uio_rw; /* see above */
59: struct proc *uio_procp;/* associated process or NULL */
60: };
61:
62: /*
63: * Limits
64: */
65: #define UIO_SMALLIOV 8 /* 8 on stack, else malloc */
66: #endif /* _KERNEL */
67:
68: #define UIO_MAXIOV 1024 /* Deprecated, use IOV_MAX instead */
69:
70: #ifndef _KERNEL
71: #include <sys/cdefs.h>
72:
73: __BEGIN_DECLS
74: #if __BSD_VISIBLE
75: ssize_t preadv(int, const struct iovec *, int, off_t);
76: ssize_t pwritev(int, const struct iovec *, int, off_t);
77: #endif /* __BSD_VISIBLE */
78: ssize_t readv(int, const struct iovec *, int);
79: ssize_t writev(int, const struct iovec *, int);
80: __END_DECLS
81: #else
82: int ureadc(int c, struct uio *);
83:
84: int dofilereadv(struct proc *, int, struct file *,
85: const struct iovec *, int, off_t *, register_t *);
86: int dofilewritev(struct proc *, int, struct file *,
87: const struct iovec *, int, off_t *, register_t *);
88:
89: #endif /* !_KERNEL */
90:
91: #endif /* !_SYS_UIO_H_ */
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