is increment on shared ulong atomic operation?

[rsw0x via Digitalmars-d-learn]

On Sunday, 7 February 2016 at 19:27:19 UTC, Charles Hixson wrote:
> If I define a shared ulong variable, is increment an atomic 
> operation?
> E.g.
>
> shared ulong t;
>
> ...
>
> t++;
>
> It seems as if it ought to be, but it could be split into read, 
> increment, store.
>
> I started off defining a shared struct, but that seems silly, 
> as if the operations defined within a shared struct are synced, 
> then the operation on a shared variable should be synced, but 
> "+=" is clearly stated not to be synchronized, so I'm uncertain.

https://dlang.org/phobos/core_atomic.html#.atomicOp