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Diffstat (limited to 'cpukit/libnetworking/sys/uio.h')
| -rw-r--r-- | cpukit/libnetworking/sys/uio.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/cpukit/libnetworking/sys/uio.h b/cpukit/libnetworking/sys/uio.h new file mode 100644 index 0000000000..6b12a91260 --- /dev/null +++ b/cpukit/libnetworking/sys/uio.h @@ -0,0 +1,102 @@ +/* + * Copyright (c) 1982, 1986, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)uio.h 8.5 (Berkeley) 2/22/94 + * $FreeBSD: src/sys/sys/uio.h,v 1.40 2006/11/29 19:08:45 alfred Exp $ + */ + +/* + * $Id$ + */ + +#ifndef _SYS_UIO_H_ +#define _SYS_UIO_H_ + +#include <rtems/bsd/sys/cdefs.h> +#include <sys/types.h> + +/* + * POSIX compliant iovec definition + */ +struct iovec { + void *iov_base; /* pointer to data to be written */ + size_t iov_len; /* length of this data block */ +}; + +#if __BSD_VISIBLE +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 + +#ifdef _KERNEL + +struct uio { + struct iovec *uio_iov; /* scatter/gather list */ + int uio_iovcnt; /* length of scatter/gather list */ + off_t uio_offset; /* offset in target object */ + ssize_t uio_resid; /* remaining bytes to process */ + enum uio_seg uio_segflg; /* address space */ + enum uio_rw uio_rw; /* operation */ +#if !defined(__rtems__) + struct thread *uio_td; /* owner */ +#else + struct proc *uio_procp; +#endif /* !__rtems__ */ +}; + +/* + * Limits + * + * N.B.: UIO_MAXIOV must be no less than IOV_MAX from <sys/syslimits.h> + * which in turn must be no less than _XOPEN_IOV_MAX from <limits.h>. If + * we ever make this tunable (probably pointless), then IOV_MAX should be + * removed from <sys/syslimits.h> and applications would be expected to use + * sysconf(3) to find out the correct value, or else assume the worst + * (_XOPEN_IOV_MAX). Perhaps UIO_MAXIOV should be simply defined as + * IOV_MAX. + */ +#define UIO_MAXIOV 1024 /* max 1K of iov's */ + +int uiomove(void *cp, int n, struct uio *uio); + +#else /* !_KERNEL */ + +__BEGIN_DECLS +ssize_t readv(int, const struct iovec *, int); +ssize_t writev(int, const struct iovec *, int); +__END_DECLS + +#endif /* _KERNEL */ + +#endif /* !_SYS_UIO_H_ */ |