Can the fluid world protected by a arc mutex be shared between threads? about salva

[LoganDark]

LiquidWorld is not Sync, so you should not share it between threads at all. Only one thread may own and interact with the LiquidWorld. Using unsafe to bypass this behavior is, well, unsafe.

[anlumo]

Sharing between threads is done using the Send trait, not Sync. It's not Send either though.

[LoganDark]

Sharing between threads is done using the Send trait, not Sync. It's not Send either though.

Actually, sharing between threads is done by Sending a shared reference:

A type is Sync if it is safe to share between threads (T is Sync if and only if &T is Send).

If LiquidWorld was Send, you would be able to transfer it between threads, but not use it from multiple threads simultaneously.

[anlumo]

True, not at the same time, but you could wrap it in an Arc<Mutex<LiquidWorld>> and use it sequentially from multiple threads.

[LoganDark]

True, not at the same time, but you could wrap it in an Arc<Mutex<LiquidWorld>> and use it sequentially from multiple threads.

That's true, because Arc is Send and Mutex is Sync, emulating the exact same behavior mentioned above.