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// Copyright 2024, Linaro Limited
// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
// SPDX-License-Identifier: GPL-2.0-or-later
use std::{ffi::CStr, ptr::addr_of};
use qemu_api::{
bindings::{module_call_init, module_init_type, qdev_prop_bool},
c_str,
cell::{self, BqlCell},
declare_properties, define_property,
prelude::*,
qdev::{DeviceImpl, DeviceState, Property, ResettablePhasesImpl},
qom::{ObjectImpl, ParentField},
sysbus::SysBusDevice,
vmstate::VMStateDescription,
zeroable::Zeroable,
};
mod vmstate_tests;
// Test that macros can compile.
pub static VMSTATE: VMStateDescription = VMStateDescription {
name: c_str!("name").as_ptr(),
unmigratable: true,
..Zeroable::ZERO
};
#[derive(qemu_api_macros::offsets)]
#[repr(C)]
#[derive(qemu_api_macros::Object)]
pub struct DummyState {
parent: ParentField<DeviceState>,
migrate_clock: bool,
}
qom_isa!(DummyState: Object, DeviceState);
pub struct DummyClass {
parent_class: <DeviceState as ObjectType>::Class,
}
impl DummyClass {
pub fn class_init<T: DeviceImpl>(self: &mut DummyClass) {
self.parent_class.class_init::<T>();
}
}
declare_properties! {
DUMMY_PROPERTIES,
define_property!(
c_str!("migrate-clk"),
DummyState,
migrate_clock,
unsafe { &qdev_prop_bool },
bool
),
}
unsafe impl ObjectType for DummyState {
type Class = DummyClass;
const TYPE_NAME: &'static CStr = c_str!("dummy");
}
impl ObjectImpl for DummyState {
type ParentType = DeviceState;
const ABSTRACT: bool = false;
const CLASS_INIT: fn(&mut DummyClass) = DummyClass::class_init::<Self>;
}
impl ResettablePhasesImpl for DummyState {}
impl DeviceImpl for DummyState {
fn properties() -> &'static [Property] {
&DUMMY_PROPERTIES
}
fn vmsd() -> Option<&'static VMStateDescription> {
Some(&VMSTATE)
}
}
#[derive(qemu_api_macros::offsets)]
#[repr(C)]
#[derive(qemu_api_macros::Object)]
pub struct DummyChildState {
parent: ParentField<DummyState>,
}
qom_isa!(DummyChildState: Object, DeviceState, DummyState);
pub struct DummyChildClass {
parent_class: <DummyState as ObjectType>::Class,
}
unsafe impl ObjectType for DummyChildState {
type Class = DummyChildClass;
const TYPE_NAME: &'static CStr = c_str!("dummy_child");
}
impl ObjectImpl for DummyChildState {
type ParentType = DummyState;
const ABSTRACT: bool = false;
const CLASS_INIT: fn(&mut DummyChildClass) = DummyChildClass::class_init::<Self>;
}
impl ResettablePhasesImpl for DummyChildState {}
impl DeviceImpl for DummyChildState {}
impl DummyChildClass {
pub fn class_init<T: DeviceImpl>(self: &mut DummyChildClass) {
self.parent_class.class_init::<T>();
}
}
fn init_qom() {
static ONCE: BqlCell<bool> = BqlCell::new(false);
cell::bql_start_test();
if !ONCE.get() {
unsafe {
module_call_init(module_init_type::MODULE_INIT_QOM);
}
ONCE.set(true);
}
}
#[test]
/// Create and immediately drop an instance.
fn test_object_new() {
init_qom();
drop(DummyState::new());
drop(DummyChildState::new());
}
#[test]
#[allow(clippy::redundant_clone)]
/// Create, clone and then drop an instance.
fn test_clone() {
init_qom();
let p = DummyState::new();
assert_eq!(p.clone().typename(), "dummy");
drop(p);
}
#[test]
/// Try invoking a method on an object.
fn test_typename() {
init_qom();
let p = DummyState::new();
assert_eq!(p.typename(), "dummy");
}
// a note on all "cast" tests: usually, especially for downcasts the desired
// class would be placed on the right, for example:
//
// let sbd_ref = p.dynamic_cast::<SysBusDevice>();
//
// Here I am doing the opposite to check that the resulting type is correct.
#[test]
#[allow(clippy::shadow_unrelated)]
/// Test casts on shared references.
fn test_cast() {
init_qom();
let p = DummyState::new();
let p_ptr: *mut DummyState = p.as_mut_ptr();
let p_ref: &mut DummyState = unsafe { &mut *p_ptr };
let obj_ref: &Object = p_ref.upcast();
assert_eq!(addr_of!(*obj_ref), p_ptr.cast());
let sbd_ref: Option<&SysBusDevice> = obj_ref.dynamic_cast();
assert!(sbd_ref.is_none());
let dev_ref: Option<&DeviceState> = obj_ref.downcast();
assert_eq!(addr_of!(*dev_ref.unwrap()), p_ptr.cast());
// SAFETY: the cast is wrong, but the value is only used for comparison
unsafe {
let sbd_ref: &SysBusDevice = obj_ref.unsafe_cast();
assert_eq!(addr_of!(*sbd_ref), p_ptr.cast());
}
}
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