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/* Copyright (C) 1996-1997, 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#if !defined _SYS_UIO_H && !defined _FCNTL_H
# error "Never include <bits/uio.h> directly; use <sys/uio.h> instead."
#endif
#ifndef _BITS_UIO_H
#define _BITS_UIO_H 1
#include <sys/types.h>
/* `struct iovec' -- Structure describing a section of memory. */
struct iovec
{
/* Starting address. */
__ptr_t iov_base;
/* Length in bytes. */
size_t iov_len;
};
/* Maximum number of 'struct iovec's that can be passed to a readv() or
writev() system call. For larger arrays of 'struct iovec', the libc
uses a single read() or write() call to guarantee atomicity. */
#define UIO_MAXIOV 1024
#ifdef __USE_MISC
enum uio_rw { UIO_READ, UIO_WRITE };
/* Segment flag values. */
enum uio_seg {
UIO_USERSPACE, /* from user data space */
UIO_SYSSPACE, /* from system space */
UIO_NOCOPY /* don't copy, already in object */
};
#endif
#endif
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