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I haven't used it yet, but apparently Rust's FFI with C (in both directions) is quite good:

That doesn't do IPC though right? When I say IPC, I mean where you have a Rust process and and a C/C++ process running with different privileges. When people say FFI, they mean Rust code and C code running in the same process.

I thought Chromium had a library for this (for multiple C++ processes), but I guess it is sort of ad hoc now?

https://www.chromium.org/developers/design-documents/inter-p...

https://www.chromium.org/Home/chromium-security/education/se...

https://github.com/pcwalton/gaol

This seems like a great start, but it would be far more useful if there was a C/C++ side. I only see Rust examples, which makes me think it is for Rust <-> Rust communication.

Though it's great to see this, because just rewriting in Rust -- while fantastically expensive -- isn't necessarily enough. You need multiple security measures. The grandparent comment was mistaken about this.

In fact, we removed language features in order to gain a zero-cost interop.

Which ones?

Green threads.

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