mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-20 15:03:30 +08:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/* msync -- Synchronize mapped memory to external storage. Mach version.
|
|
Copyright (C) 2002-2018 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/mman.h>
|
|
#include <errno.h>
|
|
#include <mach.h>
|
|
|
|
/* Some Mach variants have vm_msync and some don't. Those that have it
|
|
define the VM_SYNC_* bits when we include <mach/mach_types.h>. */
|
|
|
|
#ifndef VM_SYNC_SYNCHRONOUS
|
|
# include <misc/msync.c>
|
|
#else
|
|
|
|
/* Synchronize the region starting at ADDR and extending LEN bytes with the
|
|
file it maps. Filesystem operations on a file being mapped are
|
|
unpredictable before this is done. */
|
|
|
|
int
|
|
msync (void *addr, size_t len, int flags)
|
|
{
|
|
vm_sync_t sync_flags = 0;
|
|
kern_return_t err;
|
|
|
|
if (flags & MS_SYNC)
|
|
sync_flags |= VM_SYNC_SYNCHRONOUS;
|
|
if (flags & MS_ASYNC)
|
|
sync_flags |= VM_SYNC_ASYNCHRONOUS;
|
|
if (flags & MS_INVALIDATE)
|
|
sync_flags |= VM_SYNC_INVALIDATE;
|
|
|
|
if (err = __vm_msync (__mach_task_self (),
|
|
(vm_address_t) addr, (vm_size_t) len, sync_flags))
|
|
{
|
|
errno = err;
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|