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