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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,
os::raw::c_void,
ptr::{addr_of, addr_of_mut},
};
use qemu_api::{
bindings::*,
c_str,
cell::{self, BqlCell},
declare_properties, define_property,
prelude::*,
qdev::{DeviceImpl, DeviceState, Property},
qom::ObjectImpl,
vmstate::VMStateDescription,
zeroable::Zeroable,
};
// 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: DeviceState,
migrate_clock: bool,
}
qom_isa!(DummyState: Object, DeviceState);
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 = <DeviceState as ObjectType>::Class;
const TYPE_NAME: &'static CStr = c_str!("dummy");
}
impl ObjectImpl for DummyState {
type ParentType = DeviceState;
const ABSTRACT: bool = false;
}
impl DeviceImpl for DummyState {
fn properties() -> &'static [Property] {
&DUMMY_PROPERTIES
}
fn vmsd() -> Option<&'static VMStateDescription> {
Some(&VMSTATE)
}
}
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();
unsafe {
object_unref(object_new(DummyState::TYPE_NAME.as_ptr()).cast());
}
}
// 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: *mut DummyState = unsafe { object_new(DummyState::TYPE_NAME.as_ptr()).cast() };
let p_ref: &DummyState = unsafe { &*p };
let obj_ref: &Object = p_ref.upcast();
assert_eq!(addr_of!(*obj_ref), p.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.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.cast());
object_unref(p_ref.as_object_mut_ptr().cast::<c_void>());
}
}
#[test]
#[allow(clippy::shadow_unrelated)]
/// Test casts on mutable references.
fn test_cast_mut() {
init_qom();
let p: *mut DummyState = unsafe { object_new(DummyState::TYPE_NAME.as_ptr()).cast() };
let p_ref: &mut DummyState = unsafe { &mut *p };
let obj_ref: &mut Object = p_ref.upcast_mut();
assert_eq!(addr_of_mut!(*obj_ref), p.cast());
let sbd_ref: Result<&mut SysBusDevice, &mut Object> = obj_ref.dynamic_cast_mut();
let obj_ref = sbd_ref.unwrap_err();
let dev_ref: Result<&mut DeviceState, &mut Object> = obj_ref.downcast_mut();
let dev_ref = dev_ref.unwrap();
assert_eq!(addr_of_mut!(*dev_ref), p.cast());
// SAFETY: the cast is wrong, but the value is only used for comparison
unsafe {
let sbd_ref: &mut SysBusDevice = obj_ref.unsafe_cast_mut();
assert_eq!(addr_of_mut!(*sbd_ref), p.cast());
object_unref(p_ref.as_object_mut_ptr().cast::<c_void>());
}
}
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