Synchronisation help

[user1234]

On Monday, 1 January 2024 at 15:48:16 UTC, Anonymouse wrote:
> I have a `shared string[int]` AA that I access from two 
> different threads. The function I spawn to start the second 
> thread takes the AA as an argument.
>
> [...]
>
> What is the common solution here? Do I add a module-level 
> `Object thing` and move everything accessing the AA into 
> `synchronized(.thing)` statements? Or maybe add a `shared 
> static` something to `Foo` and synchronise with 
> `synchronize(Foo.thing)`?

Do not use `shared` AA. Use `__gshared` + sync primitives. 
`shared` AA will lead to all sort of bugs:

- https://issues.dlang.org/show_bug.cgi?id=20484#c1
- https://issues.dlang.org/show_bug.cgi?id=17088
- https://issues.dlang.org/show_bug.cgi?id=16597
- etc.