glibc/sysdeps/unix/sysv/linux/pwritev.c
Ulrich Drepper 7f8a28efb5 * sysdeps/unix/sysv/linux/preadv.c: The kernel API changed. Adjust.
* sysdeps/unix/sysv/linux/pwritev.c: Likewise.

2009-04-23  Jakub Jelinek  <jakub@redhat.com>

	* sysdeps/posix/pwritev.c (PWRITEV): Fix up comment.  Copy
	data from vector to temporary buffer and call PWRITEV after it
	instead of vice versa.
	* sysdeps/posix/preadv.c: Fix up comment.
	* misc/preadv.c: Likewise.
	* misc/preadv64.c: Likewise.
	* misc/pwritev.c: Likewise.
	* misc/pwritev64.c: Likewise.
	* misc/sys/uio.h (preadv, pwritev, preadv64, pwritev64): Likewise.

2009-04-23  Ulrich Drepper  <drepper@redhat.com>
2009-04-23 22:52:24 +00:00

96 lines
2.5 KiB
C

/* Copyright (C) 2009 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. */
#include <errno.h>
#include <stddef.h>
#include <sys/param.h>
#if __WORDSIZE == 64 && !defined PWRITEV
/* Hide the pwritev64 declaration. */
# define pwritev64 __redirect_pwritev64
#endif
#include <sys/uio.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
#include <kernel-features.h>
#ifndef PWRITEV
# define PWRITEV pwritev
# define PWRITEV_REPLACEMENT __atomic_pwritev_replacement
# define PWRITE __pwrite
# define OFF_T off_t
#endif
#define LO_HI_LONG(val) \
(off_t) val, \
(off_t) ((((uint64_t) (val)) >> (sizeof (long) * 4)) >> (sizeof (long) * 4))
#ifndef __ASSUME_PWRITEV
static ssize_t PWRITEV_REPLACEMENT (int, __const struct iovec *,
int, OFF_T) internal_function;
#endif
ssize_t
PWRITEV (fd, vector, count, offset)
int fd;
const struct iovec *vector;
int count;
OFF_T offset;
{
#ifdef __NR_pwritev
ssize_t result;
if (SINGLE_THREAD_P)
result = INLINE_SYSCALL (pwritev, 5, fd, vector, count,
LO_HI_LONG (offset));
else
{
int oldtype = LIBC_CANCEL_ASYNC ();
result = INLINE_SYSCALL (pwritev, 5, fd, vector, count,
LO_HI_LONG (offset));
LIBC_CANCEL_RESET (oldtype);
}
# ifdef __ASSUME_PWRITEV
return result;
# endif
#endif
#ifndef __ASSUME_PWRITEV
# ifdef __NR_pwritev
if (result >= 0 || errno != ENOSYS)
return result;
# endif
return PWRITEV_REPLACEMENT (fd, vector, count, offset);
#endif
}
#if __WORDSIZE == 64 && defined pwritev64
# undef pwritev64
strong_alias (pwritev, pwritev64)
#endif
#ifndef __ASSUME_PWRITEV
# undef PWRITEV
# define PWRITEV static internal_function PWRITEV_REPLACEMENT
# include <sysdeps/posix/pwritev.c>
#endif