sysdeps/unix/sysv/linux/powerpc/powerpc32/posix_fadvise64.c

   1 /* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <fcntl.h>
  20 #include <sysdep.h>
  21 #include <kernel-features.h>
  22
  23 int __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise);
  24 int __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise);
  25
  26 /* Advice the system about the expected behaviour of the application with
  27    respect to the file associated with FD.  */
  28
  29 int
  30 __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise)
  31 {
  32 #ifdef __NR_fadvise64_64
  33   INTERNAL_SYSCALL_DECL (err);
  34   int ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd, advise,
  35                               __LONG_LONG_PAIR ((long)(offset >> 32), (long)offset),
  36                               __LONG_LONG_PAIR ((long)(len >> 32), (long)len));
  37   if (!INTERNAL_SYSCALL_ERROR_P (ret, err))
  38     return 0;
  39 # ifndef __ASSUME_FADVISE64_64_SYSCALL
  40   if (INTERNAL_SYSCALL_ERRNO (ret, err) != ENOSYS)
  41 # endif
  42    return INTERNAL_SYSCALL_ERRNO (ret, err);
  43 #endif
  44 #ifndef __ASSUME_FADVISE64_64_SYSCALL
  45 # ifdef __NR_fadvise64
  46   if (len != (off_t) len)
  47     return EOVERFLOW;
  48
  49   INTERNAL_SYSCALL_DECL (err2);
  50   int ret2 = INTERNAL_SYSCALL (fadvise64, err2, 6, fd, 0,
  51                                __LONG_LONG_PAIR ((long)(offset >> 32), (long)offset),
  52                                (off_t) len, advise);
  53   if (!INTERNAL_SYSCALL_ERROR_P (ret2, err2))
  54     return 0;
  55   return INTERNAL_SYSCALL_ERRNO (ret2, err2);
  56 # else
  57   return ENOSYS;
  58 # endif
  59 #endif
  60 }
  61
  62 #include <shlib-compat.h>
  63
  64 #if SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3)
  65
  66 int
  67 attribute_compat_text_section
  68 __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise)
  69 {
  70   return __posix_fadvise64_l64 (fd, offset, len, advise);
  71 }
  72
  73 versioned_symbol (libc, __posix_fadvise64_l64, posix_fadvise64, GLIBC_2_3_3);
  74 compat_symbol (libc, __posix_fadvise64_l32, posix_fadvise64, GLIBC_2_2);
  75 #else
  76 strong_alias (__posix_fadvise64_l64, posix_fadvise64);
  77 #endif