mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-24 19:51:11 +00:00
78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/* 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
|