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Annotation of XNU/bsd/sys/uio.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
                      3:  *
                      4:  * @APPLE_LICENSE_HEADER_START@
                      5:  * 
                      6:  * The contents of this file constitute Original Code as defined in and
                      7:  * are subject to the Apple Public Source License Version 1.1 (the
                      8:  * "License").  You may not use this file except in compliance with the
                      9:  * License.  Please obtain a copy of the License at
                     10:  * http://www.apple.com/publicsource and read it before using this file.
                     11:  * 
                     12:  * This Original Code and all software distributed under the License are
                     13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
                     14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
                     15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
                     16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
                     17:  * License for the specific language governing rights and limitations
                     18:  * under the License.
                     19:  * 
                     20:  * @APPLE_LICENSE_HEADER_END@
                     21:  */
                     22: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
                     23: /*
                     24:  * Copyright (c) 1982, 1986, 1993, 1994
                     25:  *     The Regents of the University of California.  All rights reserved.
                     26:  *
                     27:  * Redistribution and use in source and binary forms, with or without
                     28:  * modification, are permitted provided that the following conditions
                     29:  * are met:
                     30:  * 1. Redistributions of source code must retain the above copyright
                     31:  *    notice, this list of conditions and the following disclaimer.
                     32:  * 2. Redistributions in binary form must reproduce the above copyright
                     33:  *    notice, this list of conditions and the following disclaimer in the
                     34:  *    documentation and/or other materials provided with the distribution.
                     35:  * 3. All advertising materials mentioning features or use of this software
                     36:  *    must display the following acknowledgement:
                     37:  *     This product includes software developed by the University of
                     38:  *     California, Berkeley and its contributors.
                     39:  * 4. Neither the name of the University nor the names of its contributors
                     40:  *    may be used to endorse or promote products derived from this software
                     41:  *    without specific prior written permission.
                     42:  *
                     43:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     44:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     45:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     46:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     47:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     48:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     49:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     50:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     51:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     52:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     53:  * SUCH DAMAGE.
                     54:  *
                     55:  *     @(#)uio.h       8.5 (Berkeley) 2/22/94
                     56:  */
                     57: 
                     58: #ifndef _SYS_UIO_H_
                     59: #define        _SYS_UIO_H_
                     60: 
                     61: /*
                     62:  * XXX
                     63:  * iov_base should be a void *.
                     64:  */
                     65: struct iovec {
                     66:        char    *iov_base;      /* Base address. */
                     67:        size_t   iov_len;       /* Length. */
                     68: };
                     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_USERISPACE,         /* from user I space */
                     76:        UIO_SYSSPACE            /* from system space */
                     77: };
                     78: 
                     79: #ifdef KERNEL
                     80: struct uio {
                     81:        struct  iovec *uio_iov;
                     82:        int     uio_iovcnt;
                     83:        off_t   uio_offset;
                     84:        int     uio_resid;
                     85:        enum    uio_seg uio_segflg;
                     86:        enum    uio_rw uio_rw;
                     87:        struct  proc *uio_procp;
                     88: };
                     89: 
                     90: /*
                     91:  * Limits
                     92:  */
                     93: #define UIO_MAXIOV     1024            /* max 1K of iov's */
                     94: #define UIO_SMALLIOV   8               /* 8 on stack, else malloc */
                     95: 
                     96: extern int uiomove __P((caddr_t cp, int n, struct uio *uio));
                     97: extern int ureadc __P((int c, struct uio *uio));
                     98: extern int uwritec __P((struct uio *uio));
                     99: 
                    100: #endif /* KERNEL */
                    101: 
                    102: #ifndef        KERNEL
                    103: #include <sys/cdefs.h>
                    104: 
                    105: __BEGIN_DECLS
                    106: ssize_t        readv __P((int, const struct iovec *, int));
                    107: ssize_t        writev __P((int, const struct iovec *, int));
                    108: __END_DECLS
                    109: #endif /* !KERNEL */
                    110: #endif /* !_SYS_UIO_H_ */

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