Function import_ensure_initialized

crates/vm/src/import.rs:158–175

If `__spec__._initializing` is true, wait for the module to finish initializing by calling `_lock_unlock_module`.

(
    module: &PyObjectRef,
    name: &str,
    vm: &VirtualMachine,
)

/// If `__spec__._initializing` is true, wait for the module to finish
/// initializing by calling `_lock_unlock_module`.
fn import_ensure_initialized(
    module: &PyObjectRef,
    name: &str,
    vm: &VirtualMachine,
) -> PyResult<()> {
    let initializing = match vm.get_attribute_opt(module.clone(), vm.ctx.intern_str("__spec__"))? {
        Some(spec) => match vm.get_attribute_opt(spec, vm.ctx.intern_str("_initializing"))? {
            Some(v) => v.try_to_bool(vm)?,
            None => false,
        },
        None => false,
    };
    if initializing {
        let lock_unlock = vm.importlib.get_attr("_lock_unlock_module", vm)?;
        lock_unlock.call((vm.ctx.new_utf8_str(name),), vm)?;
    }
    Ok(())
}

pub fn import_code_obj(
    vm: &VirtualMachine,