diff options
Diffstat (limited to 'REORG.TODO/sysdeps/mach/msync.c')
-rw-r--r-- | REORG.TODO/sysdeps/mach/msync.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/mach/msync.c b/REORG.TODO/sysdeps/mach/msync.c new file mode 100644 index 0000000000..f84553269e --- /dev/null +++ b/REORG.TODO/sysdeps/mach/msync.c @@ -0,0 +1,56 @@ +/* msync -- Synchronize mapped memory to external storage. Mach version. + Copyright (C) 2002-2017 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 |