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Commit	Line	Data
	1	/*
	2	* Copyright (c) 1982, 1986, 1993, 1994
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*
	33	* @(#)uio.h 8.5 (Berkeley) 2/22/94
	34	* $FreeBSD: src/sys/sys/uio.h,v 1.11.2.1 2001/09/28 16:58:35 dillon Exp $
	35	* $DragonFly: src/sys/sys/uio.h,v 1.3 2003/06/25 03:56:10 dillon Exp $
	36	*/
	37
	38	#ifndef _SYS_UIO_H_
	39	#define _SYS_UIO_H_
	40
	41	/*
	42	* XXX
	43	* iov_base should be a void *.
	44	*/
	45	struct iovec {
	46	char iov_base; / Base address. */
	47	size_t iov_len; /* Length. */
	48	};
	49
	50	enum uio_rw { UIO_READ, UIO_WRITE };
	51
	52	/* Segment flag values. */
	53	enum uio_seg {
	54	UIO_USERSPACE, /* from user data space */
	55	UIO_SYSSPACE, /* from system space */
	56	UIO_USERISPACE, /* from user I space */
	57	UIO_NOCOPY /* don't copy, already in object */
	58	};
	59
	60	#ifdef _KERNEL
	61
	62	/*
	63	* uio_td is primarily used for USERSPACE transfers, but some devices
	64	* like ttys may also use it to get at the process.
	65	*/
	66	struct uio {
	67	struct iovec *uio_iov;
	68	int uio_iovcnt;
	69	off_t uio_offset;
	70	int uio_resid;
	71	enum uio_seg uio_segflg;
	72	enum uio_rw uio_rw;
	73	struct thread *uio_td;
	74	};
	75
	76	/*
	77	* Limits
	78	*/
	79	#define UIO_MAXIOV 1024 /* max 1K of iov's */
	80	#define UIO_SMALLIOV 8 /* 8 on stack, else malloc */
	81
	82	struct vm_object;
	83
	84	void uio_yield __P((void));
	85	int uiomove __P((caddr_t, int, struct uio *));
	86	int uiomoveco __P((caddr_t, int, struct uio , struct vm_object ));
	87	int uioread __P((int, struct uio , struct vm_object , int *));
	88
	89	#else /* !_KERNEL */
	90
	91	#include <sys/cdefs.h>
	92
	93	__BEGIN_DECLS
	94	ssize_t readv __P((int, const struct iovec *, int));
	95	ssize_t writev __P((int, const struct iovec *, int));
	96	__END_DECLS
	97
	98	#endif /* _KERNEL */
	99
	100	#endif /* !_SYS_UIO_H_ */