if (CreateIoCompletionPort(f->hFile, wd->iocp, 0, 0) == NULL) {
log_err("windowsaio: failed to create io completion port\n");
if (CreateIoCompletionPort(f->hFile, wd->iocp, 0, 0) == NULL) {
log_err("windowsaio: failed to create io completion port\n");