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/* vi: set sw=4 ts=4: */
/*
* posix_fadvise() for ARM uClibc
* http://www.opengroup.org/onlinepubs/009695399/functions/posix_fadvise.html
*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <sys/syscall.h>
#include <fcntl.h>
#if defined __NR_arm_fadvise64_64
#define HIGH_BITS(x) (sizeof(x) > 4 ? (x) >> 32 : 0)
/* Was named __libc_posix_fadvise for some inexplicable reason.
** google says only uclibc has *__libc*_posix_fadviseXXX,
** so it cannot be compat with anything.
**
** Remove this comment and one at the end after 0.9.31
*/
/* This is for the ARM version of fadvise64_64 which swaps the params
* about to avoid having ABI compat issues
*/
#define __NR___syscall_arm_fadvise64_64 __NR_arm_fadvise64_64
int posix_fadvise(int fd, off_t offset, off_t len, int advise)
{
INTERNAL_SYSCALL_DECL (err);
int ret = INTERNAL_SYSCALL (arm_fadvise64_64, err, 6, fd, advise,
__LONG_LONG_PAIR (HIGH_BITS(offset), (long)offset),
__LONG_LONG_PAIR (HIGH_BITS(len), (long)len));
if (INTERNAL_SYSCALL_ERROR_P (ret, err))
return INTERNAL_SYSCALL_ERRNO (ret, err);
return 0;
}
/* weak_alias(__libc_posix_fadvise, posix_fadvise); */
#elif defined __UCLIBC_HAS_STUBS__
int posix_fadvise(int fd attribute_unused, off_t offset attribute_unused, off_t len attribute_unused, int advice attribute_unused)
{
return ENOSYS;
}
#endif
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