l4/pkg/uclibc/lib/contrib/uclibc/libc/sysdeps/linux/xtensa/posix_fadvise.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * posix_fadvise() for Xtensa uClibc
   4  *
   5  * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
   6  * Copyright (C) 2007 Tensilica Inc.
   7  *
   8  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
   9  */
  10
  11 #include <sys/syscall.h>
  12 #include <fcntl.h>
  13
  14 int posix_fadvise (int fd, off_t offset, off_t len, int advice)
  15 {
  16 #ifdef __NR_fadvise64_64
  17         INTERNAL_SYSCALL_DECL (err);
  18         int ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd, advice,
  19                                                                 __LONG_LONG_PAIR ((long) (offset >> 31),
  20                                                                                                   (long) offset),
  21                                                                 __LONG_LONG_PAIR ((long) (len >> 31),
  22                                                                                                   (long) len));
  23         if (!INTERNAL_SYSCALL_ERROR_P (ret, err))
  24                 return 0;
  25         return INTERNAL_SYSCALL_ERRNO (ret, err);
  26 #else
  27         return ENOSYS;
  28 #endif
  29 }