| /* Copyright (C) 1996, 1997, 2006 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> |
| |
| |
| /* We should normally use the Linux kernel header file to define this |
| type and macros but this calls for trouble because of the header |
| includes other kernel headers. */ |
| |
| /* Size of object which can be written atomically. |
| |
| This macro has different values in different kernel versions. The |
| latest versions of the kernel use 1024 and this is good choice. Since |
| the C library implementation of readv/writev is able to emulate the |
| functionality even if the currently running kernel does not support |
| this large value the readv/writev call will not fail because of this. */ |
| #define UIO_MAXIOV 1024 |
| #define UIO_FASTIOV 8 |
| |
| |
| /* Structure for scatter/gather I/O. */ |
| struct iovec |
| { |
| void *iov_base; /* Pointer to data. */ |
| size_t iov_len; /* Length of data. */ |
| }; |
| |
| #endif |