mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 13:30:06 +00:00
74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
/* Copyright (C) 1997-2013 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
|
|
|
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/>. */
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <endian.h>
|
|
#include <unistd.h>
|
|
|
|
#include <sysdep-cancel.h>
|
|
#include <sys/syscall.h>
|
|
|
|
#include <kernel-features.h>
|
|
|
|
#ifdef __NR_pwrite64 /* Newer kernels renamed but it's the same. */
|
|
# ifdef __NR_pwrite
|
|
# error "__NR_pwrite and __NR_pwrite64 both defined???"
|
|
# endif
|
|
# define __NR_pwrite __NR_pwrite64
|
|
#endif
|
|
|
|
|
|
static ssize_t
|
|
#ifdef NO_CANCELLATION
|
|
inline __attribute ((always_inline))
|
|
#endif
|
|
do_pwrite (int fd, const void *buf, size_t count, off_t offset)
|
|
{
|
|
ssize_t result;
|
|
|
|
assert (sizeof (offset) == 4);
|
|
result = INLINE_SYSCALL (pwrite, 5, fd, buf, count,
|
|
__LONG_LONG_PAIR (offset >> 31, offset));
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
ssize_t
|
|
__libc_pwrite (fd, buf, count, offset)
|
|
int fd;
|
|
const void *buf;
|
|
size_t count;
|
|
off_t offset;
|
|
{
|
|
if (SINGLE_THREAD_P)
|
|
return do_pwrite (fd, buf, count, offset);
|
|
|
|
int oldtype = LIBC_CANCEL_ASYNC ();
|
|
|
|
ssize_t result = do_pwrite (fd, buf, count, offset);
|
|
|
|
LIBC_CANCEL_RESET (oldtype);
|
|
|
|
return result;
|
|
}
|
|
|
|
strong_alias (__libc_pwrite, __pwrite)
|
|
weak_alias (__libc_pwrite, pwrite)
|