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Annotation of sys/sys/uio.h, Revision 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_ */