Variable modified by different threads.

[Andy Valencia]

On Tuesday, 3 December 2024 at 23:16:00 UTC, Richard (Rikki) 
Andrew Cattermole wrote:
> What owned by a thread means is that a pointer is guaranteed to 
> only be accessible by that thread. I.e. the cpu will segfault 
> if you try to access it from another thread.

My experience is that aside from thread-local module globals, all 
other objects you create can be subsequently cast to shared and 
then sent on to another thread.  It can be accessed on the 
receiving thread as such, or cast back to un-shared and used as 
just another private data structure.

In fact, parts of Phobos will not work with objects having a 
shared attribute.  So you have to be careful about transferring 
ownership for such data structures, and verifying your code path 
guarantees exclusive access before casting it back to unshared.

Andy