1 /* msync -- Synchronize mapped memory to external storage. Mach version.
2 Copyright (C) 2002-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
19 #include <sys/types.h>
24 /* Some Mach variants have vm_msync and some don't. Those that have it
25 define the VM_SYNC_* bits when we include <mach/mach_types.h>. */
27 #ifndef VM_SYNC_SYNCHRONOUS
28 # include <misc/msync.c>
31 /* Synchronize the region starting at ADDR and extending LEN bytes with the
32 file it maps. Filesystem operations on a file being mapped are
33 unpredictable before this is done. */
36 msync (void *addr
, size_t len
, int flags
)
38 vm_sync_t sync_flags
= 0;
42 sync_flags
|= VM_SYNC_SYNCHRONOUS
;
44 sync_flags
|= VM_SYNC_ASYNCHRONOUS
;
45 if (flags
& MS_INVALIDATE
)
46 sync_flags
|= VM_SYNC_INVALIDATE
;
48 if (err
= __vm_msync (__mach_task_self (),
49 (vm_address_t
) addr
, (vm_size_t
) len
, sync_flags
))