Hi Ondřej,

> I have two questions:
> 
> 1. I've tried to help TSAN by replacing the custom atomics with __atomic gcc
>    primitives - that seems to work pretty well.  Note that using C11 stdatomics
>    is frankly not possible here because it would require wrapping everything into
>    _Atomic().

I'm using the attached patch which does much the same.

Ciao, Duncan.