| 1 | /* $NetBSD: uio.h,v 1.36 2011/07/27 13:20:07 uebayasi Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1982, 1986, 1993, 1994 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. Neither the name of the University nor the names of its contributors |
| 16 | * may be used to endorse or promote products derived from this software |
| 17 | * without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 29 | * SUCH DAMAGE. |
| 30 | * |
| 31 | * @(#)uio.h 8.5 (Berkeley) 2/22/94 |
| 32 | */ |
| 33 | |
| 34 | #ifndef _SYS_UIO_H_ |
| 35 | #define _SYS_UIO_H_ |
| 36 | |
| 37 | #ifdef _KERNEL |
| 38 | #ifndef __UIO_EXPOSE |
| 39 | #define __UIO_EXPOSE |
| 40 | #endif |
| 41 | #endif |
| 42 | |
| 43 | #include <machine/ansi.h> |
| 44 | #include <sys/featuretest.h> |
| 45 | |
| 46 | #ifdef _BSD_SIZE_T_ |
| 47 | typedef _BSD_SIZE_T_ size_t; |
| 48 | #undef _BSD_SIZE_T_ |
| 49 | #endif |
| 50 | |
| 51 | #ifdef _BSD_SSIZE_T_ |
| 52 | typedef _BSD_SSIZE_T_ ssize_t; |
| 53 | #undef _BSD_SSIZE_T_ |
| 54 | #endif |
| 55 | |
| 56 | struct iovec { |
| 57 | void *iov_base; /* Base address. */ |
| 58 | size_t iov_len; /* Length. */ |
| 59 | }; |
| 60 | |
| 61 | #if defined(_NETBSD_SOURCE) |
| 62 | #include <sys/ansi.h> |
| 63 | |
| 64 | #ifndef off_t |
| 65 | typedef __off_t off_t; /* file offset */ |
| 66 | #define off_t __off_t |
| 67 | #endif |
| 68 | |
| 69 | enum uio_rw { UIO_READ, UIO_WRITE }; |
| 70 | |
| 71 | /* Segment flag values. */ |
| 72 | enum uio_seg { |
| 73 | UIO_USERSPACE, /* from user data space */ |
| 74 | UIO_SYSSPACE /* from system space */ |
| 75 | }; |
| 76 | |
| 77 | #ifdef __UIO_EXPOSE |
| 78 | |
| 79 | struct vmspace; |
| 80 | |
| 81 | struct uio { |
| 82 | struct iovec *uio_iov; /* pointer to array of iovecs */ |
| 83 | int uio_iovcnt; /* number of iovecs in array */ |
| 84 | off_t uio_offset; /* offset into file this uio corresponds to */ |
| 85 | size_t uio_resid; /* residual i/o count */ |
| 86 | enum uio_rw uio_rw; /* see above */ |
| 87 | struct vmspace *uio_vmspace; |
| 88 | }; |
| 89 | #define UIO_SETUP_SYSSPACE(uio) uio_setup_sysspace(uio) |
| 90 | |
| 91 | #endif /* __UIO_EXPOSE */ |
| 92 | |
| 93 | /* |
| 94 | * Limits |
| 95 | */ |
| 96 | /* Deprecated: use IOV_MAX from <limits.h> instead. */ |
| 97 | #define UIO_MAXIOV 1024 /* max 1K of iov's */ |
| 98 | #endif /* _NETBSD_SOURCE */ |
| 99 | |
| 100 | #ifdef _KERNEL |
| 101 | |
| 102 | /* 8 on stack, more will be dynamically allocated. */ |
| 103 | #define UIO_SMALLIOV 8 |
| 104 | |
| 105 | void uio_setup_sysspace(struct uio *); |
| 106 | #endif |
| 107 | |
| 108 | #ifndef _KERNEL |
| 109 | #include <sys/cdefs.h> |
| 110 | |
| 111 | __BEGIN_DECLS |
| 112 | #if defined(_NETBSD_SOURCE) |
| 113 | ssize_t preadv(int, const struct iovec *, int, off_t); |
| 114 | ssize_t pwritev(int, const struct iovec *, int, off_t); |
| 115 | #endif /* _NETBSD_SOURCE */ |
| 116 | ssize_t readv(int, const struct iovec *, int); |
| 117 | ssize_t writev(int, const struct iovec *, int); |
| 118 | __END_DECLS |
| 119 | #else |
| 120 | int ureadc(int, struct uio *); |
| 121 | #endif /* !_KERNEL */ |
| 122 | |
| 123 | #endif /* !_SYS_UIO_H_ */ |
| 124 | |