sl@0: /*-
sl@0:  * Copyright (c) 1982, 1986, 1993, 1994
sl@0:  *	The Regents of the University of California.  All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 4. Neither the name of the University nor the names of its contributors
sl@0:  *    may be used to endorse or promote products derived from this software
sl@0:  *    without specific prior written permission.
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  * © * Portions Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
sl@0:  *	@(#)uio.h	8.5 (Berkeley) 2/22/94
sl@0:  * $FreeBSD: src/sys/sys/uio.h,v 1.39 2005/07/07 18:17:55 jhb Exp $
sl@0:  */
sl@0: 
sl@0: #ifndef _SYS_UIO_H_
sl@0: #define	_SYS_UIO_H_
sl@0: 
sl@0: #include <sys/cdefs.h>
sl@0: #include <sys/_types.h>
sl@0: #include <sys/_iovec.h>
sl@0: 
sl@0: #ifndef _SSIZE_T_DECLARED
sl@0: typedef	__ssize_t	ssize_t;
sl@0: #define	_SSIZE_T_DECLARED
sl@0: #endif
sl@0: 
sl@0: #ifndef _OFF_T_DECLARED
sl@0: typedef	__off_t	off_t;
sl@0: #define	_OFF_T_DECLARED
sl@0: #endif
sl@0: 
sl@0: #if __BSD_VISIBLE
sl@0: enum	uio_rw { UIO_READ, UIO_WRITE };
sl@0: 
sl@0: /* Segment flag values. */
sl@0: enum uio_seg {
sl@0: 	UIO_USERSPACE,		/* from user data space */
sl@0: 	UIO_SYSSPACE,		/* from system space */
sl@0: 	UIO_NOCOPY		/* don't copy, already in object */
sl@0: };
sl@0: #endif
sl@0: 
sl@0: #ifdef _KERNEL
sl@0: 
sl@0: struct uio {
sl@0: 	struct	iovec *uio_iov;
sl@0: 	int	uio_iovcnt;
sl@0: 	off_t	uio_offset;
sl@0: 	int	uio_resid;
sl@0: 	enum	uio_seg uio_segflg;
sl@0: 	enum	uio_rw uio_rw;
sl@0: 	struct	thread *uio_td;
sl@0: };
sl@0: 
sl@0: /*
sl@0:  * Limits
sl@0:  *
sl@0:  * N.B.: UIO_MAXIOV must be no less than IOV_MAX from <sys/syslimits.h>
sl@0:  * which in turn must be no less than _XOPEN_IOV_MAX from <limits.h>.  If
sl@0:  * we ever make this tunable (probably pointless), then IOV_MAX should be
sl@0:  * removed from <sys/syslimits.h> and applications would be expected to use
sl@0:  * sysconf(3) to find out the correct value, or else assume the worst
sl@0:  * (_XOPEN_IOV_MAX).  Perhaps UIO_MAXIOV should be simply defined as
sl@0:  * IOV_MAX.
sl@0:  */
sl@0: #define UIO_MAXIOV	1024		/* max 1K of iov's */
sl@0: 
sl@0: struct vm_object;
sl@0: struct vm_page;
sl@0: 
sl@0: #else /* !_KERNEL */
sl@0: 
sl@0: __BEGIN_DECLS
sl@0: IMPORT_C
sl@0: ssize_t	readv(int, const struct iovec *, int);
sl@0: IMPORT_C
sl@0: ssize_t	writev(int, const struct iovec *, int);
sl@0: __END_DECLS
sl@0: 
sl@0: #endif /* _KERNEL */
sl@0: 
sl@0: #endif /* !_SYS_UIO_H_ */