glibc/sysdeps/unix/sysv/linux/posix_fadvise64.c

/* Copyright (C) 2003-2015 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, see
   <http://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <fcntl.h>
#include <sysdep.h>

int __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise);
int __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise);

/* Advice the system about the expected behaviour of the application with
   respect to the file associated with FD.  */

int
__posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise)
{
  INTERNAL_SYSCALL_DECL (err);
  int ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd,
			      __LONG_LONG_PAIR ((long) (offset >> 32),
						(long) offset),
			      __LONG_LONG_PAIR ((long) (len >> 32),
						(long) len),
			      advise);
  if (!INTERNAL_SYSCALL_ERROR_P (ret, err))
    return 0;
  return INTERNAL_SYSCALL_ERRNO (ret, err);
}

#include <shlib-compat.h>

#if SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3)

int
attribute_compat_text_section
__posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise)
{
  return __posix_fadvise64_l64 (fd, offset, len, advise);
}

versioned_symbol (libc, __posix_fadvise64_l64, posix_fadvise64, GLIBC_2_3_3);
compat_symbol (libc, __posix_fadvise64_l32, posix_fadvise64, GLIBC_2_2);
#else
strong_alias (__posix_fadvise64_l64, posix_fadvise64);
#endif