| /* Copyright (C) 2007 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <sysdep.h> |
| #include <sys/mman.h> |
| |
| |
| int |
| posix_madvise (void *addr, size_t len, int advice) |
| { |
| /* We have one problem: the kernel's MADV_DONTNEED does not |
| correspond to POSIX's POSIX_MADV_DONTNEED. The former simply |
| discards changes made to the memory without writing it back to |
| disk, if this would be necessary. The POSIX behavior does not |
| allow this. There is no functionality mapping the POSIX behavior |
| so far so we ignore that advice for now. */ |
| if (advice == POSIX_MADV_DONTNEED) |
| return 0; |
| |
| INTERNAL_SYSCALL_DECL (err); |
| int result = INTERNAL_SYSCALL (madvise, err, 3, addr, len, advice); |
| return INTERNAL_SYSCALL_ERRNO (result, err); |
| } |
