Wrap CRUBIT_THREAD_SAFE types in UnsafeCell#746
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For types annotated with CRUBIT_THREAD_SAFE, replace the normal Rust struct fields with a single opaque UnsafeCell<[MaybeUninit<u8>; SIZE]> body. This enables interior mutability, allowing non-const C++ methods to be called through shared references. This also prevents standard Rust `#[derive(Copy, Clone)]` generation, and forces an explicit alignment override since the opaque byte array body has alignment 1. PiperOrigin-RevId: 911579009
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Wrap CRUBIT_THREAD_SAFE types in UnsafeCell
For types annotated with CRUBIT_THREAD_SAFE, replace the normal Rust struct
fields with a single opaque UnsafeCell<[MaybeUninit; SIZE]> body.
This enables interior mutability, allowing non-const C++ methods to be
called through shared references.
This also prevents standard Rust
#[derive(Copy, Clone)]generation,and forces an explicit alignment override since the opaque byte array body
has alignment 1.