uclibc-ng/libc/sysdeps/linux/mips/posix_fadvise64.c

/* vi: set sw=4 ts=4: */
/*
 * posix_fadvise64() for MIPS 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 <_lfs_64.h>
#include <sys/syscall.h>
#include <bits/wordsize.h>

/* MIPS kernel only has NR_fadvise64 which acts as NR_fadvise64_64 */
#if defined __NR_fadvise64 && __WORDSIZE == 32
# include <fcntl.h>
# include <endian.h>

int posix_fadvise64(int fd, off64_t offset, off64_t len, int advice)
{
	INTERNAL_SYSCALL_DECL(err);
# if _MIPS_SIM == _ABIO32
	int ret = INTERNAL_SYSCALL(fadvise64, err, 7, fd, 0,
				   __LONG_LONG_PAIR ((long) (offset >> 32), (long) offset),
				   __LONG_LONG_PAIR ((long) (len >> 32), (long) len),
				   advice);
# else /* N32 || N64 */
	int ret = INTERNAL_SYSCALL(fadvise64, err, 4, fd, offset, len, advice);
# endif
	if (INTERNAL_SYSCALL_ERROR_P (ret, err))
		return INTERNAL_SYSCALL_ERRNO (ret, err);
	return 0;
}
#endif