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/* $NetBSD: uio.h,v 1.34 2006/03/01 12:38:32 yamt 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 _EFI_SIZE_T_
typedef _EFI_SIZE_T_ size_t;
#undef _EFI_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 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
#include <sys/mallocvar.h>
MALLOC_DECLARE(M_IOV);
#define UIO_SMALLIOV 8 /* 8 on stack, else malloc */
void uio_setup_sysspace(struct uio *);
#endif
#ifndef _KERNEL
#include <sys/EfiCdefs.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_ */
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