| /* msync -- Synchronize mapped memory to external storage. Mach version. |
| Copyright (C) 2002-2016 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 (__ptr_t 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 |