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

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * posix_fadvise64() 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 <features.h>
  12 #include <unistd.h>
  13 #include <errno.h>
  14 #include <endian.h>
  15 #include <stdint.h>
  16 #include <sys/types.h>
  17 #include <sys/syscall.h>
  18 #include <fcntl.h>
  19
  20 #ifdef __UCLIBC_HAS_LFS__
  21
  22 int posix_fadvise64 (int fd, __off64_t offset, __off64_t len, int advice)
  23 {
  24 #ifdef __NR_fadvise64_64
  25         INTERNAL_SYSCALL_DECL (err);
  26         int ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd, advice,
  27                                                                 __LONG_LONG_PAIR ((long) (offset >> 32),
  28                                                                                                   (long) offset),
  29                                                                 __LONG_LONG_PAIR ((long) (len >> 32),
  30                                                                                                   (long) len));
  31         if (!INTERNAL_SYSCALL_ERROR_P (ret, err))
  32                 return 0;
  33         return INTERNAL_SYSCALL_ERRNO (ret, err);
  34 #else
  35         return ENOSYS;
  36 #endif
  37 }
  38
  39 #endif /* __UCLIBC_HAS_LFS__ */