1 /* $NetBSD: uio.h,v 1.34 2006/03/01 12:38:32 yamt 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 _EFI_SIZE_T_ 47 typedef _EFI_SIZE_T_ size_t; 48 #undef _EFI_SIZE_T_ 49 #undef _BSD_SIZE_T_ 50 #endif 51 52 #ifdef _BSD_SSIZE_T_ 53 typedef _BSD_SSIZE_T_ ssize_t; 54 #undef _BSD_SSIZE_T_ 55 #endif 56 57 struct iovec { 58 void *iov_base; /* Base address. */ 59 size_t iov_len; /* Length. */ 60 }; 61 62 #if defined(_NETBSD_SOURCE) 63 #include <sys/ansi.h> 64 65 #ifndef off_t 66 typedef __off_t off_t; /* file offset */ 67 #define off_t __off_t 68 #endif 69 70 enum uio_rw { UIO_READ, UIO_WRITE }; 71 72 /* Segment flag values. */ 73 enum uio_seg { 74 UIO_USERSPACE, /* from user data space */ 75 UIO_SYSSPACE /* from system space */ 76 }; 77 78 #ifdef __UIO_EXPOSE 79 80 struct uio { 81 struct iovec *uio_iov; /* pointer to array of iovecs */ 82 int uio_iovcnt; /* number of iovecs in array */ 83 off_t uio_offset; /* offset into file this uio corresponds to */ 84 size_t uio_resid; /* residual i/o count */ 85 enum uio_rw uio_rw; /* see above */ 86 struct vmspace *uio_vmspace; 87 }; 88 #define UIO_SETUP_SYSSPACE(uio) uio_setup_sysspace(uio) 89 90 #endif /* __UIO_EXPOSE */ 91 92 /* 93 * Limits 94 */ 95 /* Deprecated: use IOV_MAX from <limits.h> instead. */ 96 #define UIO_MAXIOV 1024 /* max 1K of iov's */ 97 #endif /* _NETBSD_SOURCE */ 98 99 #ifdef _KERNEL 100 #include <sys/mallocvar.h> 101 102 MALLOC_DECLARE(M_IOV); 103 104 #define UIO_SMALLIOV 8 /* 8 on stack, else malloc */ 105 106 void uio_setup_sysspace(struct uio *); 107 #endif 108 109 #ifndef _KERNEL 110 #include <sys/EfiCdefs.h> 111 112 __BEGIN_DECLS 113 #if defined(_NETBSD_SOURCE) 114 ssize_t preadv(int, const struct iovec *, int, off_t); 115 ssize_t pwritev(int, const struct iovec *, int, off_t); 116 #endif /* _NETBSD_SOURCE */ 117 ssize_t readv(int, const struct iovec *, int); 118 ssize_t writev(int, const struct iovec *, int); 119 __END_DECLS 120 #else 121 int ureadc(int, struct uio *); 122 #endif /* !_KERNEL */ 123 124 #endif /* !_SYS_UIO_H_ */ 125
