| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* msync -- Synchronize mapped memory to external storage. Mach version. |
| 2 | Copyright (C) 2002-2015 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 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. |
| 9 | |
| 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. |
| 14 | |
| 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 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <sys/types.h> |
| 20 | #include <sys/mman.h> |
| 21 | #include <errno.h> |
| 22 | #include <mach.h> |
| 23 | |
| 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>. */ |
| 26 | |
| 27 | #ifndef VM_SYNC_SYNCHRONOUS |
| 28 | # include <misc/msync.c> |
| 29 | #else |
| 30 | |
| 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. */ |
| 34 | |
| 35 | int |
| 36 | msync (__ptr_t addr, size_t len, int flags) |
| 37 | { |
| 38 | vm_sync_t sync_flags = 0; |
| 39 | kern_return_t err; |
| 40 | |
| 41 | if (flags & MS_SYNC) |
| 42 | sync_flags |= VM_SYNC_SYNCHRONOUS; |
| 43 | if (flags & MS_ASYNC) |
| 44 | sync_flags |= VM_SYNC_ASYNCHRONOUS; |
| 45 | if (flags & MS_INVALIDATE) |
| 46 | sync_flags |= VM_SYNC_INVALIDATE; |
| 47 | |
| 48 | if (err = __vm_msync (__mach_task_self (), |
| 49 | (vm_address_t) addr, (vm_size_t) len, sync_flags)) |
| 50 | { |
| 51 | errno = err; |
| 52 | return -1; |
| 53 | } |
| 54 | return 0; |
| 55 | } |
| 56 | #endif |