LCOM1920-T02G10

/*        $NetBSD: uio.h,v 1.36 2011/07/27 13:20:07 uebayasi Exp $        */

/*

 * Copyright (c) 1982, 1986, 1993, 1994

 *        The Regents of the University of California.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *

 *        @(#)uio.h        8.5 (Berkeley) 2/22/94

 */

#ifndef _SYS_UIO_H_

#define        _SYS_UIO_H_

#ifdef _KERNEL

#ifndef __UIO_EXPOSE

#define __UIO_EXPOSE

#endif

#endif

#include <machine/ansi.h>

#include <sys/featuretest.h>

#ifdef        _BSD_SIZE_T_

typedef        _BSD_SIZE_T_        size_t;

#undef        _BSD_SIZE_T_

#endif

#ifdef        _BSD_SSIZE_T_

typedef        _BSD_SSIZE_T_        ssize_t;

#undef        _BSD_SSIZE_T_

#endif

struct iovec {

        void        *iov_base;        /* Base address. */

        size_t         iov_len;        /* Length. */

};

#if defined(_NETBSD_SOURCE)

#include <sys/ansi.h>

#ifndef        off_t

typedef        __off_t                off_t;        /* file offset */

#define        off_t                __off_t

#endif

enum        uio_rw { UIO_READ, UIO_WRITE };

/* Segment flag values. */

enum uio_seg {

        UIO_USERSPACE,                /* from user data space */

        UIO_SYSSPACE                /* from system space */

};

#ifdef __UIO_EXPOSE

struct vmspace;

struct uio {

        struct        iovec *uio_iov;        /* pointer to array of iovecs */

        int        uio_iovcnt;        /* number of iovecs in array */

        off_t        uio_offset;        /* offset into file this uio corresponds to */

        size_t        uio_resid;        /* residual i/o count */

        enum        uio_rw uio_rw;        /* see above */

        struct        vmspace *uio_vmspace;

};

#define        UIO_SETUP_SYSSPACE(uio)        uio_setup_sysspace(uio)

#endif /* __UIO_EXPOSE */

/*

 * Limits

 */

/* Deprecated: use IOV_MAX from <limits.h> instead. */

#define UIO_MAXIOV        1024                /* max 1K of iov's */

#endif /* _NETBSD_SOURCE */

#ifdef _KERNEL

/* 8 on stack, more will be dynamically allocated. */

#define UIO_SMALLIOV        8

void uio_setup_sysspace(struct uio *);

#endif

#ifndef        _KERNEL

#include <sys/cdefs.h>

__BEGIN_DECLS

#if defined(_NETBSD_SOURCE)

ssize_t preadv(int, const struct iovec *, int, off_t);

ssize_t pwritev(int, const struct iovec *, int, off_t);

#endif /* _NETBSD_SOURCE */

ssize_t        readv(int, const struct iovec *, int);

ssize_t        writev(int, const struct iovec *, int);

__END_DECLS

#else

int ureadc(int, struct uio *);

#endif /* !_KERNEL */

#endif /* !_SYS_UIO_H_ */