diff options
Diffstat (limited to 'sysdeps/unix/sysv')
| -rw-r--r-- | sysdeps/unix/sysv/linux/posix_madvise.c | 38 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/syscalls.list | 1 |
2 files changed, 38 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/posix_madvise.c b/sysdeps/unix/sysv/linux/posix_madvise.c new file mode 100644 index 0000000000..d0e476b61e --- /dev/null +++ b/sysdeps/unix/sysv/linux/posix_madvise.c @@ -0,0 +1,38 @@ +/* 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 advise) +{ + /* 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 advise for now. */ + if (advise == POSIX_MADV_DONTNEED) + return 0; + + INTERNAL_SYSCALL_DECL (err); + int result = INTERNAL_SYSCALL (madvise, err, 3, addr, len, advise); + return INTERNAL_SYSCALL_ERRNO (result, err); +} diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list index 5776673733..38103f0c68 100644 --- a/sysdeps/unix/sysv/linux/syscalls.list +++ b/sysdeps/unix/sysv/linux/syscalls.list @@ -32,7 +32,6 @@ ioperm - ioperm i:iii ioperm iopl - iopl i:i iopl klogctl EXTRA syslog i:isi klogctl lchown - lchown i:sii __lchown lchown -posix_madvise - madvise Vi:pii posix_madvise madvise - madvise i:pii madvise mincore - mincore i:anV mincore mlock - mlock i:bn mlock |