fileSyncWindows

fn fileSyncWindows(userdata: ?*anyopaque, file: File) File.SyncError!void {
    const t: *Threaded = @ptrCast(@alignCast(userdata));
    _ = t;

    var io_status_block: windows.IO_STATUS_BLOCK = undefined;
    const syscall: Syscall = try .start();
    while (true) {
        switch (windows.ntdll.NtFlushBuffersFile(file.handle, &io_status_block)) {
            .SUCCESS => break syscall.finish(),
            .CANCELLED => {
                try syscall.checkCancel();
                continue;
            },
            .INVALID_HANDLE => unreachable,
            .ACCESS_DENIED => return syscall.fail(error.AccessDenied), // a sync was performed but the system couldn't update the access time
            .UNEXPECTED_NETWORK_ERROR => return syscall.fail(error.InputOutput),
            else => |status| return syscall.unexpectedNtstatus(status),
        }
    }
}