pub type WasmSize = u32;Expand description
Something like usize for wasm.
Wasm has a memory limit of 4GB so offsets and lengths fit in u32.
When rust compiles to the wasm32-unknown-unknown target, usize will be u32 in
wasm, but the host could interpret usize as either u32 or u64. For that reason
we specify u32 everywhere we need the host and the guest to have a shared agreement
on the size of an offset/length, or the host will not be able to directly
manipulate the guest memory as it needs to.
Wasmer itself uses u32 in the WasmPtr abstraction etc.
@see https://docs.rs/wasmer-runtime/0.17.0/wasmer_runtime/struct.WasmPtr.html