Trait wasmtime_runtime::GcHeapObject

source · 
pub unsafe trait GcHeapObject: Send + Sync {
    // Required method
    fn is(header: &VMGcHeader) -> bool;
}
Expand description

A trait implemented by all objects allocated inside a GC heap.

§Safety

All implementations must:

  • Be repr(C) or repr(transparent)

  • Begin with a VMGcHeader as their first field

  • Not have Drop implementations (aka, std::mem::needs_drop::<Self>() should return false).

  • Be memory safe to transmute to from an arbitrary byte sequence (that is, it is okay if some bit patterns are invalid with regards to correctness, so long as these invalid bit patterns cannot lead to memory unsafety).

Required Methods§

source

fn is(header: &VMGcHeader) -> bool

Check whether the GC object with the given header is an instance of Self.

Object Safety§

This trait is not object safe.

Implementors§