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Annotation of Net2/sys/uio.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1982, 1986 The Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  * 3. All advertising materials mentioning features or use of this software
                     14:  *    must display the following acknowledgement:
                     15:  *     This product includes software developed by the University of
                     16:  *     California, Berkeley and its contributors.
                     17:  * 4. Neither the name of the University nor the names of its contributors
                     18:  *    may be used to endorse or promote products derived from this software
                     19:  *    without specific prior written permission.
                     20:  *
                     21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     31:  * SUCH DAMAGE.
                     32:  *
                     33:  *     @(#)uio.h       7.8 (Berkeley) 4/15/91
                     34:  */
                     35: 
                     36: #ifndef _UIO_H_
                     37: #define        _UIO_H_
                     38: 
                     39: struct iovec {
                     40:        caddr_t iov_base;
                     41:        int     iov_len;
                     42: };
                     43: 
                     44: enum   uio_rw { UIO_READ, UIO_WRITE };
                     45: 
                     46: /*
                     47:  * Segment flag values.
                     48:  */
                     49: enum   uio_seg {
                     50:        UIO_USERSPACE,          /* from user data space */
                     51:        UIO_SYSSPACE,           /* from system space */
                     52:        UIO_USERISPACE          /* from user I space */
                     53: };
                     54: 
                     55: struct uio {
                     56:        struct  iovec *uio_iov;
                     57:        int     uio_iovcnt;
                     58:        off_t   uio_offset;
                     59:        int     uio_resid;
                     60:        enum    uio_seg uio_segflg;
                     61:        enum    uio_rw uio_rw;
                     62:        struct  proc *uio_procp;
                     63: };
                     64: 
                     65:  /*
                     66:   * Limits
                     67:   */
                     68: #define UIO_MAXIOV     1024            /* max 1K of iov's */
                     69: #define UIO_SMALLIOV   8               /* 8 on stack, else malloc */
                     70: 
                     71: #ifndef        KERNEL
                     72: 
                     73: #include <sys/cdefs.h>
                     74: 
                     75: __BEGIN_DECLS
                     76: int    readv __P((int, const struct iovec *, int));
                     77: int    writev __P((int, const struct iovec *, int));
                     78: __END_DECLS
                     79: 
                     80: #endif /* !KERNEL */
                     81: 
                     82: #endif /* !_UIO_H_ */

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