The Store is not Send nor Sync.

[Berrysoft]

wasmi is a great drop-in replacement for wasmtime in most cases. However, the type Store is not Send nor Sync, which is the biggest difference. Store is used everywhere, and in my use case, Send and Sync are needed. Although I can unsafe impl myself, it would be better to look into the code and find out why they are not implemented.

[Robbepop]

Thank you for pointing that out! Since we try to mirror the Wasmtime API as good as we can we want our Store to be Send and Sync. We should look into how we can do that most efficiently.

[Robbepop]

May I ask what you are using wasmi for? :)

[Berrysoft]

I'm not currently using wasmi (mainly because of the WASI things). However I'd like to try it, because it is an intepreter instead of JIT, which means it could support more platforms.

I'm using WASM for a plugin system in a framework. There are some async and multithreading affairs. It would be good if wasmi supports multithreading by making the types Send and Sync.

[Robbepop]

I just created a PR that makes Store Send and Sync and also adds a test that asserts that Store remains Send and Sync in the future. :)
Fortunately the fix was simpler than I initially feared.