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* misc/Makefile (routines): Add preadv, preadv64, pwritev, pwritev64.

Browse Source 
* misc/Versions: Export preadv, preadv64, pwritev, pwritev64 for
	GLIBC_2.10.
	* misc/sys/uio.h: Declare preadv, preadv64, pwritev, pwritev64.
	* sysdeps/unix/sysv/linux/kernel-features.h: Add entries for preadv
	and pwritev.
	* misc/preadv.c: New file.
	* misc/preadv64.c: New file.
	* misc/pwritev.c: New file.
	* misc/pwritev64.c: New file.
	* sysdeps/posx/preadv.c: New file.
	* sysdeps/posx/preadv64.c: New file.
	* sysdeps/posx/pwritev.c: New file.
	* sysdeps/posx/pwritev64.c: New file.
	* sysdeps/unix/sysv/linux/preadv.c: New file.
	* sysdeps/unix/sysv/linux/preadv64.c: New file.
	* sysdeps/unix/sysv/linux/pwritev.c: New file.
	* sysdeps/unix/sysv/linux/pwritev64.c: New file.
	* sysdeps/unix/sysv/linux/wordsize-64/preadv64.c: New file.
	* sysdeps/unix/sysv/linux/wordsize-64/pwritev64.c: New file.
This commit is contained in:
Ulrich Drepper 2009-04-03 19:57:16 +00:00
parent 7166c77ad0
commit e109c6124f
20 changed files with 708 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
ChangeLog
View File

@ -1,5 +1,26 @@
2009-04-03 Ulrich Drepper <drepper@redhat.com>
* misc/Makefile (routines): Add preadv, preadv64, pwritev, pwritev64.
* misc/Versions: Export preadv, preadv64, pwritev, pwritev64 for
GLIBC_2.10.
* misc/sys/uio.h: Declare preadv, preadv64, pwritev, pwritev64.
* sysdeps/unix/sysv/linux/kernel-features.h: Add entries for preadv
and pwritev.
* misc/preadv.c: New file.
* misc/preadv64.c: New file.
* misc/pwritev.c: New file.
* misc/pwritev64.c: New file.
* sysdeps/posx/preadv.c: New file.
* sysdeps/posx/preadv64.c: New file.
* sysdeps/posx/pwritev.c: New file.
* sysdeps/posx/pwritev64.c: New file.
* sysdeps/unix/sysv/linux/preadv.c: New file.
* sysdeps/unix/sysv/linux/preadv64.c: New file.
* sysdeps/unix/sysv/linux/pwritev.c: New file.
* sysdeps/unix/sysv/linux/pwritev64.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/preadv64.c: New file.
* sysdeps/unix/sysv/linux/wordsize-64/pwritev64.c: New file.
* sysdeps/unix/sysv/linux/readv.c (__libc_readv): Fix calling of
compatibility code.
* sysdeps/unix/sysv/linux/writev.c (__libc_writev): Likewise.

13
NEWS
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@ -1,4 +1,4 @@
GNU C Library NEWS -- history of user-visible changes. 2009-3-14
GNU C Library NEWS -- history of user-visible changes. 2009-4-3
Copyright (C) 1992-2008, 2009 Free Software Foundation, Inc.
See the end for copying conditions.
@ -7,7 +7,11 @@ using `glibc' in the "product" field.
Version 2.10
* New interfaces: preadv, preadv64, pwritev, pwritev64
Implemented by Ulrich Drepper.
* New Linux interfaces: accept4, fallocate, fallocate64.
Implemented by Ulrich Drepper.
* Correct declarations of string function when used in C++ code. This
could lead to compile error for invalid C++ code.
@ -24,6 +28,13 @@ Version 2.10
* Support for selecting between multiple function definitions at runtime
using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
* The libcrypt library can now use the hash function implementations in
NSS. Implemented by Ulrich Drepper.
* The malloc implementation can be compiled to be less memory efficient
but higher performing in multi-threaded programs.
Implemented by Ulrich Drepper.
* New locale: nan_TW@latin

2
misc/Makefile
View File

@ -34,7 +34,7 @@ headers := sys/uio.h bits/uio.h sys/ioctl.h bits/ioctls.h bits/ioctl-types.h \
bits/syslog.h bits/syslog-ldbl.h bits/syslog-path.h bits/error.h
routines := brk sbrk sstk ioctl \
readv writev \
readv writev preadv preadv64 pwritev pwritev64 \
setreuid setregid \
seteuid setegid \
getpagesize \

3
misc/Versions
View File

@ -137,4 +137,7 @@ libc {
GLIBC_2.7 {
mkostemp; mkostemp64;
}
GLIBC_2.10 {
preadv; preadv64; pwritev; pwritev64;
}
}

41
misc/preadv.c Normal file
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@ -0,0 +1,41 @@
/* 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 <unistd.h>
#include <sys/uio.h>
/* Read data from file descriptor FD at the given position OFFSET
without change the file pointer, and put the result in the buffers
described by VECTOR, which is a vector of COUNT 'struct iovec's.
The buffers are filled in the order specified. Operates just like
'read' (see <unistd.h>) except that data are put in VECTOR instead
of a contiguous buffer. */
ssize_t
preadv (fd, vector, count, offset)
int fd;
const struct iovec *vector;
int count;
off_t offset;
{
__set_errno (ENOSYS);
return -1;
}
stub_warning (preadv)
#include <stub-tag.h>

41
misc/preadv64.c Normal file
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@ -0,0 +1,41 @@
/* 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 <unistd.h>
#include <sys/uio.h>
/* Read data from file descriptor FD at the given position OFFSET
without change the file pointer, and put the result in the buffers
described by VECTOR, which is a vector of COUNT 'struct iovec's.
The buffers are filled in the order specified. Operates just like
'read' (see <unistd.h>) except that data are put in VECTOR instead
of a contiguous buffer. */
ssize_t
preadv64 (fd, vector, count, offset)
int fd;
const struct iovec *vector;
int count;
off64_t offset;
{
__set_errno (ENOSYS);
return -1;
}
stub_warning (preadv64)
#include <stub-tag.h>

41
misc/pwritev.c Normal file
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@ -0,0 +1,41 @@
/* 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 <unistd.h>
#include <sys/uio.h>
/* Write data pointed by the buffers described by VECTOR, which is a
vector of COUNT 'struct iovec's, to file descriptor FD at the given
position OFFSET without change the file pointer. The data is
written in the order specified. Operates just like 'write' (see
<unistd.h>) except that the data are taken from VECTOR instead of a
contiguous buffer. */
ssize_t
pwritev (fd, vector, count, offset)
int fd;
const struct iovec *vector;
int count;
off_t offset;
{
__set_errno (ENOSYS);
return -1;
}
stub_warning (pwritev)
#include <stub-tag.h>

41
misc/pwritev64.c Normal file
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@ -0,0 +1,41 @@
/* 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 <unistd.h>
#include <sys/uio.h>
/* Write data pointed by the buffers described by VECTOR, which is a
vector of COUNT 'struct iovec's, to file descriptor FD at the given
position OFFSET without change the file pointer. The data is
written in the order specified. Operates just like 'write' (see
<unistd.h>) except that the data are taken from VECTOR instead of a
contiguous buffer. */
ssize_t
pwritev64 (fd, vector, count, offset)
int fd;
const struct iovec *vector;
int count;
off64_t offset;
{
__set_errno (ENOSYS);
return -1;
}
stub_warning (pwritev64)
#include <stub-tag.h>

83
misc/sys/uio.h
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@ -1,4 +1,4 @@
/* Copyright (C) 1991, 92, 96, 97, 98, 99, 2003 Free Software Foundation, Inc.
/* Copyright (C) 1991,1992,1996-1999,2003,2009 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
@ -30,24 +30,93 @@ __BEGIN_DECLS
/* Read data from file descriptor FD, and put the result in the
buffers described by IOVEC, which is a vector of COUNT `struct iovec's.
buffers described by IOVEC, which is a vector of COUNT 'struct iovec's.
The buffers are filled in the order specified.
Operates just like `read' (see <unistd.h>) except that data are
Operates just like 'read' (see <unistd.h>) except that data are
put in IOVEC instead of a contiguous buffer.
This function is a cancellation point and therefore not marked with
__THROW. */
extern ssize_t readv (int __fd, __const struct iovec *__iovec, int __count);
extern ssize_t readv (int __fd, __const struct iovec *__iovec, int __count)
__wur;
/* Write data pointed by the buffers described by IOVEC, which
is a vector of COUNT `struct iovec's, to file descriptor FD.
is a vector of COUNT 'struct iovec's, to file descriptor FD.
The data is written in the order specified.
Operates just like `write' (see <unistd.h>) except that the data
Operates just like 'write' (see <unistd.h>) except that the data
are taken from IOVEC instead of a contiguous buffer.
This function is a cancellation point and therefore not marked with
__THROW. */
extern ssize_t writev (int __fd, __const struct iovec *__iovec, int __count);
extern ssize_t writev (int __fd, __const struct iovec *__iovec, int __count)
__wur;
#ifdef __USE_BSD
# ifndef __USE_FILE_OFFSET64
/* Read data from file descriptor FD at the given position OFFSET
without change the file pointer, and put the result in the buffers
described by IOVEC, which is a vector of COUNT 'struct iovec's.
The buffers are filled in the order specified. Operates just like
'read' (see <unistd.h>) except that data are put in IOVEC instead
of a contiguous buffer.
This function is a cancellation point and therefore not marked with
__THROW. */
extern ssize_t preadv (int __fd, __const struct iovec *__iovec, int __count,
__off_t __offset) __wur;
/* Write data pointed by the buffers described by IOVEC, which is a
vector of COUNT 'struct iovec's, to file descriptor FD at the given
position OFFSET without change the file pointer. The data is
written in the order specified. Operates just like 'write' (see
<unistd.h>) except that the data are taken from IOVEC instead of a
contiguous buffer.
This function is a cancellation point and therefore not marked with
__THROW. */
extern ssize_t pwritev (int __fd, __const struct iovec *__iovec, int __count,
__off_t __offset) __wur;
# else
# ifdef __REDIRECT
extern ssize_t __REDIRECT (preadv, (int __fd, __const struct iovec *__iovec,
int __count, __off_t __offset),
preadv64) __wur;
extern ssize_t __REDIRECT (pwritev, (int __fd, __const struct iovec *__iovec,
int __count, __off_t __offset),
pwritev64) __wur;
# else
# define preadv preadv64
# define pwritev pwritev64
# endif
# endif
# ifdef __USE_LARGEFILE64
/* Read data from file descriptor FD at the given position OFFSET
without change the file pointer, and put the result in the buffers
described by IOVEC, which is a vector of COUNT 'struct iovec's.
The buffers are filled in the order specified. Operates just like
'read' (see <unistd.h>) except that data are put in IOVEC instead
of a contiguous buffer.
This function is a cancellation point and therefore not marked with
__THROW. */
extern ssize_t preadv64 (int __fd, __const struct iovec *__iovec, int __count,
__off64_t __offset) __wur;
/* Write data pointed by the buffers described by IOVEC, which is a
vector of COUNT 'struct iovec's, to file descriptor FD at the given
position OFFSET without change the file pointer. The data is
written in the order specified. Operates just like 'write' (see
<unistd.h>) except that the data are taken from IOVEC instead of a
contiguous buffer.
This function is a cancellation point and therefore not marked with
__THROW. */
extern ssize_t pwritev64 (int __fd, __const struct iovec *__iovec, int __count,
__off64_t __offset) __wur;
# endif
#endif /* Use BSD */
__END_DECLS

108
sysdeps/posix/preadv.c Normal file
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@ -0,0 +1,108 @@
/* 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 <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <limits.h>
#include <stdbool.h>
#include <sys/param.h>
#if __WORDSIZE == 64 && !defined PREADV
/* Hide the preadv64 declaration. */
# define preadv64 __redirect_preadv64
#endif
#include <sys/uio.h>
#include <bits/wordsize.h>
#ifndef PREADV
# define PREADV preadv
# define PREAD __pread
# define OFF_T off_t
#endif
static void
ifree (char **ptrp)
{
free (*ptrp);
}
/* Read data from file descriptor FD at the given position OFFSET
without change the file pointer, and put the result in the buffers
described by VECTOR, which is a vector of COUNT 'struct iovec's.
The buffers are filled in the order specified. Operates just like
'read' (see <unistd.h>) except that data are put in VECTOR instead
of a contiguous buffer. */
ssize_t
PREADV (int fd, const struct iovec *vector, int count, OFF_T offset)
{
/* Find the total number of bytes to be read. */
size_t bytes = 0;
for (int i = 0; i < count; ++i)
{
/* Check for ssize_t overflow. */
if (SSIZE_MAX - bytes < vector[i].iov_len)
{
__set_errno (EINVAL);
return -1;
}
bytes += vector[i].iov_len;
}
/* Allocate a temporary buffer to hold the data. We should normally
use alloca since it's faster and does not require synchronization
with other threads. But we cannot if the amount of memory
required is too large. */
char *buffer;
char *malloced_buffer __attribute__ ((__cleanup__ (ifree))) = NULL;
if (__libc_use_alloca (bytes))
buffer = (char *) __alloca (bytes);
else
{
malloced_buffer = buffer = (char *) malloc (bytes);
if (buffer == NULL)
return -1;
}
/* Read the data. */
ssize_t bytes_read = PREAD (fd, buffer, bytes, offset);
if (bytes_read <= 0)
return -1;
/* Copy the data from BUFFER into the memory specified by VECTOR. */
bytes = bytes_read;
for (int i = 0; i < count; ++i)
{
size_t copy = MIN (vector[i].iov_len, bytes);
(void) memcpy ((void *) vector[i].iov_base, (void *) buffer, copy);
buffer += copy;
bytes -= copy;
if (bytes == 0)
break;
}
return bytes_read;
}
#if __WORDSIZE == 64 && defined preadv64
# undef preadv64
strong_alias (preadv, preadv64)
#endif

9
sysdeps/posix/preadv64.c Normal file
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@ -0,0 +1,9 @@
#include <bits/wordsize.h>
#if __WORDSIZE == 32
# define PREADV preadv64
# define PREAD __pread64
# define OFF_T off64_t
# include "preadv.c"
#endif

108
sysdeps/posix/pwritev.c Normal file
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@ -0,0 +1,108 @@
/* 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 <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <limits.h>
#include <stdbool.h>
#include <sys/param.h>
#if __WORDSIZE == 64 && !defined PWRITEV
/* Hide the pwritev64 declaration. */
# define pwritev64 __redirect_pwritev64
#endif
#include <sys/uio.h>
#include <bits/wordsize.h>
#ifndef PWRITEV
# define PWRITEV pwritev
# define PWRITE __pwrite
# define OFF_T off_t
#endif
static void
ifree (char **ptrp)
{
free (*ptrp);
}
/* Read data from file descriptor FD at the given position OFFSET
without change the file pointer, and put the result in the buffers
described by VECTOR, which is a vector of COUNT 'struct iovec's.
The buffers are filled in the order specified. Operates just like
'read' (see <unistd.h>) except that data are put in VECTOR instead
of a contiguous buffer. */
ssize_t
PWRITEV (int fd, const struct iovec *vector, int count, OFF_T offset)
{
/* Find the total number of bytes to be read. */
size_t bytes = 0;
for (int i = 0; i < count; ++i)
{
/* Check for ssize_t overflow. */
if (SSIZE_MAX - bytes < vector[i].iov_len)
{
__set_errno (EINVAL);
return -1;
}
bytes += vector[i].iov_len;
}
/* Allocate a temporary buffer to hold the data. We should normally
use alloca since it's faster and does not require synchronization
with other threads. But we cannot if the amount of memory
required is too large. */
char *buffer;
char *malloced_buffer __attribute__ ((__cleanup__ (ifree))) = NULL;
if (__libc_use_alloca (bytes))
buffer = (char *) __alloca (bytes);
else
{
malloced_buffer = buffer = (char *) malloc (bytes);
if (buffer == NULL)
return -1;
}
/* Read the data. */
ssize_t bytes_read = PWRITE (fd, buffer, bytes, offset);
if (bytes_read <= 0)
return -1;
/* Copy the data from BUFFER into the memory specified by VECTOR. */
bytes = bytes_read;
for (int i = 0; i < count; ++i)
{
size_t copy = MIN (vector[i].iov_len, bytes);
(void) memcpy ((void *) vector[i].iov_base, (void *) buffer, copy);
buffer += copy;
bytes -= copy;
if (bytes == 0)
break;
}
return bytes_read;
}
#if __WORDSIZE == 64 && defined pwritev64
# undef pwritev64
strong_alias (pwritev, pwritev64)
#endif

9
sysdeps/posix/pwritev64.c Normal file
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@ -0,0 +1,9 @@
#include <bits/wordsize.h>
#if __WORDSIZE == 32
# define PWRITEV pwritev64
# define PWRITE __pwrite64
# define OFF_T off64_t
# include "pwritev.c"
#endif

7
sysdeps/unix/sysv/linux/kernel-features.h
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@ -529,3 +529,10 @@
#if __LINUX_KERNEL_VERSION >= 0x02061d
# define __ASSUME_FUTEX_CLOCK_REALTIME 1
#endif
/* Support for preadv and pwritev was added in 2.6.30. */
#if __LINUX_KERNEL_VERSION >= 0x02061e \
&& (defined __i386__ || defined __x86_64__)
# define __ASSUME_PREADV 1
# define __ASSUME_PWRITEV 1
#endif

88
sysdeps/unix/sysv/linux/preadv.c Normal file
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@ -0,0 +1,88 @@
/* 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
/* Hide the preadv64 declaration. */
# define preadv64 __redirect_preadv64
#endif
#include <sys/uio.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
#include <kernel-features.h>
#ifndef PREADV
# define PREADV preadv
# define PREADV_REPLACEMENT __atomic_preadv_replacement
# define PREAD __pread
# define OFF_T off_t
#endif
static ssize_t PREADV_REPLACEMENT (int, __const struct iovec *,
int, OFF_T) internal_function;
ssize_t
PREADV (fd, vector, count, offset)
int fd;
const struct iovec *vector;
int count;
OFF_T offset;
{
#ifdef __NR_preadv
ssize_t result;
if (SINGLE_THREAD_P)
result = INLINE_SYSCALL (preadv, 5, fd, vector, count, offset >> 32,
offset & 0xffffffff);
else
{
int oldtype = LIBC_CANCEL_ASYNC ();
result = INLINE_SYSCALL (preadv, 5, fd, vector, count, offset >> 32,
offset & 0xffffffff);
LIBC_CANCEL_RESET (oldtype);
}
# ifdef __ASSUME_PREADV
return result;
# endif
#endif
#ifndef __ASSUME_PREADV
# ifdef __NR_preadv
if (result >= 0 || errno != ENOSYS)
return result;
# endif
return PREADV_REPLACEMENT (fd, vector, count, offset);
#endif
}
#if __WORDSIZE == 64
# undef preadv64
strong_alias (preadv, preadv64)
#endif
#ifndef __ASSUME_PREADV
# undef PREADV
# define PREADV static internal_function PREADV_REPLACEMENT
# include <sysdeps/posix/preadv.c>
#endif

6
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#define PREADV preadv64
#define PREADV_REPLACEMENT __atomic_preadv64_replacement
#define PREAD __pread64
#define OFF_T off64_t
#include "preadv.c"

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/* 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
static ssize_t PWRITEV_REPLACEMENT (int, __const struct iovec *,
int, OFF_T) internal_function;
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, offset >> 32,
offset & 0xffffffff);
else
{
int oldtype = LIBC_CANCEL_ASYNC ();
result = INLINE_SYSCALL (pwritev, 5, fd, vector, count, offset >> 32,
offset & 0xffffffff);
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

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#define PWRITEV pwritev64
#define PWRITEV_REPLACEMENT __atomic_pwritev64_replacement
#define PWRITE __pwrite64
#define OFF_T off64_t
#include "pwritev.c"

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/* Empty since the preadv syscall is equivalent. */

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/* Empty since the pwritev syscall is equivalent. */