michaelpj:

OK, this is supposed to be clear from loggerExampleConcurrently. I’ll see if I can clarify that.

In that example you do the modification inside the fork, so it wasn’t obvious to me whether the modification would be visible if you did it the other way around.

Ah yes, this example needs improving, thanks!

michaelpj:

What’s the use of having thread local state that…

OK, this is supposed to be clear from loggerExampleConcurrently. I’ll see if I can clarify that.

In that example you do the modification inside the fork, so it wasn’t obvious to me whether the modification would be visible if you did it the other way around.

How would the behaviour differ? Do you mean that InheritedThreadLocalIORef could be modified within a thread like an…