private static OpenFlags instance() {
        String arch = System.getProperty("os.arch");
        switch (arch) {
            case "aarch64":
                return new Aarch64OpenFlags();
            default:
                return new DefaultOpenFlags();
        }
    }
Constants for {@link DirectIOLib#oDirectOpen(String, boolean)}.
s3stream/src/main/java/com/automq/stream/thirdparty/moe/cnkirito/kdio/OpenFlags.java