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rust/qemu-api: Use device_class_set_props_n

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This means we can update declare_properties to drop the
zero terminator at the end of the array as well.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Lei Yang <leiyang@redhat.com>
Link: https://lore.kernel.org/r/20241218134251.4724-18-richard.henderson@linaro.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Richard Henderson 2024-12-18 07:42:44 -06:00 • committed by Paolo Bonzini
parent 662cede910
commit 5f99764869
1 changed files with 6 additions and 5 deletions
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11
rust/qemu-api/src/device_class.rs
View file

@ -7,7 +7,6 @@ use std::{ffi::CStr, os::raw::c_void};
use crate::{
bindings::{self, DeviceClass, DeviceState, Error, ObjectClass, Property, VMStateDescription},
prelude::*,
zeroable::Zeroable,
};
/// Trait providing the contents of [`DeviceClass`].
@ -31,7 +30,7 @@ pub trait DeviceImpl {
/// device. Not a `const` because referencing statics in constants
/// is unstable until Rust 1.83.0.
fn properties() -> &'static [Property] {
&[Zeroable::ZERO; 1]
&[]
}
/// A `VMStateDescription` providing the migration format for the device
@ -87,7 +86,10 @@ pub unsafe extern "C" fn rust_device_class_init<T: DeviceImpl>(
if let Some(vmsd) = <T as DeviceImpl>::vmsd() {
dc.vmsd = vmsd;
}
bindings::device_class_set_props(dc, <T as DeviceImpl>::properties().as_ptr());
let prop = <T as DeviceImpl>::properties();
if !prop.is_empty() {
bindings::device_class_set_props_n(dc, prop.as_ptr(), prop.len());
}
}
}
@ -134,7 +136,7 @@ macro_rules! define_property {
macro_rules! declare_properties {
($ident:ident, $($prop:expr),*$(,)*) => {
pub static $ident: [$crate::bindings::Property; {
let mut len = 1;
let mut len = 0;
$({
_ = stringify!($prop);
len += 1;
@ -142,7 +144,6 @@ macro_rules! declare_properties {
len
}] = [
$($prop),*,
$crate::zeroable::Zeroable::ZERO,
];
};
}