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rust: qdev: expose inherited methods to subclasses of SysBusDevice

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The ObjectDeref trait now provides all the magic that is required to fake
inheritance.  Replace the "impl SysBusDevice" block of qemu_api::sysbus
with a trait, so that sysbus_init_irq() can be invoked as "self.init_irq()"
without any intermediate upcast.

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2024-11-29 10:46:44 +01:00
parent 809c703a60
commit 559a779c6a
4 changed files with 14 additions and 14 deletions
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3
rust/qemu-api/src/irq.rs
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@ -24,8 +24,7 @@ use crate::{
///
/// Interrupts are implemented as a pointer to the interrupt "sink", which has
/// type [`IRQState`]. A device exposes its source as a QOM link property using
/// a function such as
/// [`SysBusDevice::init_irq`](crate::sysbus::SysBusDevice::init_irq), and
/// a function such as [`SysBusDeviceMethods::init_irq`], and
/// initially leaves the pointer to a NULL value, representing an unconnected
/// interrupt. To connect it, whoever creates the device fills the pointer with
/// the sink's `IRQState *`, for example using `sysbus_connect_irq`. Because