|
Packit |
6c4009 |
/* Copyright (C) 2007-2018 Free Software Foundation, Inc.
|
|
Packit |
6c4009 |
This file is part of the GNU C Library.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is free software; you can redistribute it and/or
|
|
Packit |
6c4009 |
modify it under the terms of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License as published by the Free Software Foundation; either
|
|
Packit |
6c4009 |
version 2.1 of the License, or (at your option) any later version.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
The GNU C Library is distributed in the hope that it will be useful,
|
|
Packit |
6c4009 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
6c4009 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
6c4009 |
Lesser General Public License for more details.
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
You should have received a copy of the GNU Lesser General Public
|
|
Packit |
6c4009 |
License along with the GNU C Library; if not, see
|
|
Packit |
6c4009 |
<http://www.gnu.org/licenses/>. */
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
#include <sysdep.h>
|
|
Packit |
6c4009 |
#include <sys/mman.h>
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
int
|
|
Packit |
6c4009 |
posix_madvise (void *addr, size_t len, int advice)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
/* We have one problem: the kernel's MADV_DONTNEED does not
|
|
Packit |
6c4009 |
correspond to POSIX's POSIX_MADV_DONTNEED. The former simply
|
|
Packit |
6c4009 |
discards changes made to the memory without writing it back to
|
|
Packit |
6c4009 |
disk, if this would be necessary. The POSIX behavior does not
|
|
Packit |
6c4009 |
allow this. There is no functionality mapping the POSIX behavior
|
|
Packit |
6c4009 |
so far so we ignore that advice for now. */
|
|
Packit |
6c4009 |
if (advice == POSIX_MADV_DONTNEED)
|
|
Packit |
6c4009 |
return 0;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
INTERNAL_SYSCALL_DECL (err);
|
|
Packit |
6c4009 |
int result = INTERNAL_SYSCALL (madvise, err, 3, addr, len, advice);
|
|
Packit |
6c4009 |
return INTERNAL_SYSCALL_ERRNO (result, err);
|
|
Packit |
6c4009 |
}
|