124 lines
3.5 KiB
C
124 lines
3.5 KiB
C
/* $NetBSD: uio.h,v 1.36 2011/07/27 13:20:07 uebayasi Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)uio.h 8.5 (Berkeley) 2/22/94
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*/
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#ifndef _SYS_UIO_H_
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#define _SYS_UIO_H_
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#ifdef _KERNEL
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#ifndef __UIO_EXPOSE
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#define __UIO_EXPOSE
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#endif
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#endif
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#include <machine/ansi.h>
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#include <sys/featuretest.h>
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#ifdef _BSD_SIZE_T_
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typedef _BSD_SIZE_T_ size_t;
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#undef _BSD_SIZE_T_
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#endif
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#ifdef _BSD_SSIZE_T_
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typedef _BSD_SSIZE_T_ ssize_t;
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#undef _BSD_SSIZE_T_
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#endif
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struct iovec {
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void *iov_base; /* Base address. */
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size_t iov_len; /* Length. */
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};
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#if defined(_NETBSD_SOURCE)
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#include <sys/ansi.h>
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#ifndef off_t
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typedef __off_t off_t; /* file offset */
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#define off_t __off_t
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#endif
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enum uio_rw { UIO_READ, UIO_WRITE };
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/* Segment flag values. */
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enum uio_seg {
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UIO_USERSPACE, /* from user data space */
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UIO_SYSSPACE /* from system space */
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};
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#ifdef __UIO_EXPOSE
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struct vmspace;
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struct uio {
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struct iovec *uio_iov; /* pointer to array of iovecs */
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int uio_iovcnt; /* number of iovecs in array */
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off_t uio_offset; /* offset into file this uio corresponds to */
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size_t uio_resid; /* residual i/o count */
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enum uio_rw uio_rw; /* see above */
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struct vmspace *uio_vmspace;
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};
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#define UIO_SETUP_SYSSPACE(uio) uio_setup_sysspace(uio)
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#endif /* __UIO_EXPOSE */
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/*
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* Limits
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*/
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/* Deprecated: use IOV_MAX from <limits.h> instead. */
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#define UIO_MAXIOV 1024 /* max 1K of iov's */
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#endif /* _NETBSD_SOURCE */
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#ifdef _KERNEL
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/* 8 on stack, more will be dynamically allocated. */
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#define UIO_SMALLIOV 8
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void uio_setup_sysspace(struct uio *);
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#endif
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#ifndef _KERNEL
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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#if defined(_NETBSD_SOURCE)
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ssize_t preadv(int, const struct iovec *, int, off_t);
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ssize_t pwritev(int, const struct iovec *, int, off_t);
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#endif /* _NETBSD_SOURCE */
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ssize_t readv(int, const struct iovec *, int);
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ssize_t writev(int, const struct iovec *, int);
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__END_DECLS
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#else
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int ureadc(int, struct uio *);
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#endif /* !_KERNEL */
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#endif /* !_SYS_UIO_H_ */
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