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- /* Copyright (C) 1996-2016 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, see
- <http://www.gnu.org/licenses/>. */
- #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
- /* Structure for scatter/gather I/O. */
- struct iovec
- {
- void *iov_base; /* Pointer to data. */
- size_t iov_len; /* Length of data. */
- };
- #endif
- #ifdef __USE_GNU
- # if defined _SYS_UIO_H && !defined _BITS_UIO_H_FOR_SYS_UIO_H
- # define _BITS_UIO_H_FOR_SYS_UIO_H 1
- __BEGIN_DECLS
- /* Read from another process' address space. */
- extern ssize_t process_vm_readv (pid_t __pid, const struct iovec *__lvec,
- unsigned long int __liovcnt,
- const struct iovec *__rvec,
- unsigned long int __riovcnt,
- unsigned long int __flags)
- __THROW;
- /* Write to another process' address space. */
- extern ssize_t process_vm_writev (pid_t __pid, const struct iovec *__lvec,
- unsigned long int __liovcnt,
- const struct iovec *__rvec,
- unsigned long int __riovcnt,
- unsigned long int __flags)
- __THROW;
- __END_DECLS
- # endif
- #endif
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