l4/pkg/uclibc/lib/contrib/uclibc/libc/sysdeps/linux/common/posix_fadvise64.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * posix_fadvise64() for uClibc
   4  * http://www.opengroup.org/onlinepubs/009695399/functions/posix_fadvise.html
   5  *
   6  * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
   7  *
   8  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
   9  */
  10
  11 #include <_lfs_64.h>
  12 #include <sys/syscall.h>
  13 #include <bits/wordsize.h>
  14
  15 #ifdef __NR_arm_fadvise64_64
  16 # define __NR_fadvise64_64 __NR_arm_fadvise64_64
  17 #endif
  18
  19 #if defined __NR_fadvise64_64 && __WORDSIZE == 32
  20 # include <fcntl.h>
  21 # include <endian.h>
  22
  23 int posix_fadvise64(int fd, off64_t offset, off64_t len, int advice)
  24 {
  25         INTERNAL_SYSCALL_DECL (err);
  26         /* ARM has always been funky. */
  27 # if defined(__UCLIBC_SYSCALL_ALIGN_64BIT__) || defined(__arm__)
  28         int ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd, advice,
  29                         OFF64_HI_LO (offset), OFF64_HI_LO (len));
  30 # else
  31         int ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd,
  32                         OFF64_HI_LO (offset), OFF64_HI_LO (len),
  33                         advice);
  34 # endif
  35         if (INTERNAL_SYSCALL_ERROR_P (ret, err))
  36                 return INTERNAL_SYSCALL_ERRNO (ret, err);
  37         return 0;
  38 }
  39 #endif