Re: Is comparison of shared data thread-safe?

[bauss via Digitalmars-d-learn]

On Thursday, 16 March 2023 at 12:32:34 UTC, Nick Treleaven wrote:
With -preview=nosharedaccess, I get:
    int y = 2;
    shared int x = y; // OK

    assert(x == 2); // no error
    y = x; // error

So for the assignment to y, reading x is an error and 
atomicLoad should be used instead. But is it an oversight that 
reading x in the assert is not an error?

I have also found this in a unittest in core.atomic:

        shared(size_t) i;

        atomicOp!"+="(i, cast(size_t) 1);
        assert(i == 1);

Is the assert somehow thread-safe?

I think it __should__ be fine since `i` cannot be in a state 
where it gets modified and read at the same time.