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https://github.com/Motorhead1991/qemu.git
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7bd8e3ef63
Define a separate trait for fields that also applies to classes that are defined by C code. This makes it possible to add metadata to core classes, which has multiple uses: - it makes it possible to access the parent struct's TYPE_* for types that are defined in Rust code, and to avoid repeating it in every subclass - implementors of ObjectType will be allowed to implement the IsA<> trait and therefore to perform typesafe casts from one class to another. - in the future, an ObjectType could be created with Foo::new() in a type-safe manner, without having to pass a TYPE_* constant. Reviewed-by: Zhao Liu <zhao1.liu@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
71 lines
1.9 KiB
Rust
71 lines
1.9 KiB
Rust
// Copyright 2024, Linaro Limited
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// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
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// SPDX-License-Identifier: GPL-2.0-or-later
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use std::ffi::CStr;
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use qemu_api::{
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bindings::*, c_str, declare_properties, define_property, definitions::ObjectImpl,
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device_class::DeviceImpl, impl_device_class, prelude::*, zeroable::Zeroable,
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};
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#[test]
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fn test_device_decl_macros() {
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// Test that macros can compile.
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pub static VMSTATE: VMStateDescription = VMStateDescription {
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name: c_str!("name").as_ptr(),
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unmigratable: true,
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..Zeroable::ZERO
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};
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#[derive(qemu_api_macros::offsets)]
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#[repr(C)]
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#[derive(qemu_api_macros::Object)]
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pub struct DummyState {
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pub _parent: DeviceState,
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pub migrate_clock: bool,
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}
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#[repr(C)]
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pub struct DummyClass {
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pub _parent: DeviceClass,
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}
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declare_properties! {
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DUMMY_PROPERTIES,
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define_property!(
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c_str!("migrate-clk"),
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DummyState,
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migrate_clock,
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unsafe { &qdev_prop_bool },
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bool
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),
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}
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unsafe impl ObjectType for DummyState {
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type Class = DummyClass;
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const TYPE_NAME: &'static CStr = c_str!("dummy");
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}
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impl ObjectImpl for DummyState {
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const PARENT_TYPE_NAME: Option<&'static CStr> =
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Some(<DeviceState as ObjectType>::TYPE_NAME);
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const ABSTRACT: bool = false;
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}
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impl DeviceImpl for DummyState {
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fn properties() -> &'static [Property] {
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&DUMMY_PROPERTIES
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}
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fn vmsd() -> Option<&'static VMStateDescription> {
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Some(&VMSTATE)
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}
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}
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impl_device_class!(DummyState);
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unsafe {
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module_call_init(module_init_type::MODULE_INIT_QOM);
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object_unref(object_new(DummyState::TYPE_NAME.as_ptr()).cast());
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}
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}
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