diff options
Diffstat (limited to 'winsup/cygwin/mmap.cc')
| -rw-r--r-- | winsup/cygwin/mmap.cc | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/winsup/cygwin/mmap.cc b/winsup/cygwin/mmap.cc index 0ede7e6ab..da89d9d81 100644 --- a/winsup/cygwin/mmap.cc +++ b/winsup/cygwin/mmap.cc @@ -1664,7 +1664,14 @@ fhandler_disk_file::msync (HANDLE h, caddr_t addr, size_t len, int flags) cygwin list. So retry 99 times and hope we get lucky. */ for (int i = 0; i < retry; i++) if (FlushViewOfFile (addr, len)) - return 0; + { + /* FlushViewOfFile just triggers the action and returns immediately, + so it's equivalent to MS_ASYNC. MS_SYNC requires another call to + FlushFileBuffers. */ + if (flags & MS_SYNC) + FlushFileBuffers (h); + return 0; + } else if (GetLastError () != ERROR_LOCK_VIOLATION) break; else if (i < (retry - 1)) |