This is about volatile piggyback.
Purpose: I want to reach a lightweight vars visibilty. Consistency of a\_b\_c is not important. I have a bunch of vars and I don't want to make them all volatile.

Is this code threadsafe?

```
class A {
    public int a, b, c;
    volatile int sync;

    public void setup() {
        a = 2;
        b = 3;
        c = 4;
    }

    public void sync() {
        sync++;
    }
}

final static A aaa = new A();

Thread0:
aaa.setup();
end

Thread1:
for(;;) {aaa.sync(); logic with aaa.a, aaa.b, aaa.c}

Thread2:
for(;;) {aaa.sync(); logic with aaa.a, aaa.b, aaa.c}

```