Function wasmtime_externref_data

crates/c-api/src/externref.rs:33–44

(
    cx: WasmtimeStoreContextMut<'_>,
    externref: Option<&wasmtime_externref_t>,
)

#[unsafe(no_mangle)]
pub unsafe extern "C" fn wasmtime_externref_data(
    cx: WasmtimeStoreContextMut<'_>,
    externref: Option<&wasmtime_externref_t>,
) -> *mut c_void {
    externref
        .and_then(|e| e.as_wasmtime())
        .and_then(|e| {
            let data = e.data(cx).ok()??;
            Some(data.downcast_ref::<crate::ForeignData>().unwrap().data)
        })
        .unwrap_or(core::ptr::null_mut())
}