From 201ef001dd40fdb11c83f3e47604219c374590ec Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 17 Jan 2025 11:21:26 +0100 Subject: rust: qdev: add clock creation Add a Rust version of qdev_init_clock_in, which can be used in instance_init. There are a couple differences with the C version: - in Rust the object keeps its own reference to the clock (in addition to the one embedded in the NamedClockList), and the reference is dropped automatically by instance_finalize(); this is encoded in the signature of DeviceClassMethods::init_clock_in, which makes the lifetime of the clock independent of that of the object it holds. This goes unnoticed in the C version and is due to the existence of aliases. - also, anything that happens during instance_init uses the pinned_init framework to operate on a partially initialized object, and is done through class methods (i.e. through DeviceClassMethods rather than DeviceMethods) because the device does not exist yet. Therefore, Rust code *must* create clocks from instance_init, which is stricter than C. Reviewed-by: Zhao Liu Signed-off-by: Paolo Bonzini --- rust/qemu-api/src/prelude.rs | 2 ++ 1 file changed, 2 insertions(+) (limited to 'rust/qemu-api/src/prelude.rs') diff --git a/rust/qemu-api/src/prelude.rs b/rust/qemu-api/src/prelude.rs index 3df6a5c21e..87e3ce90f2 100644 --- a/rust/qemu-api/src/prelude.rs +++ b/rust/qemu-api/src/prelude.rs @@ -7,6 +7,8 @@ pub use crate::bitops::IntegerExt; pub use crate::cell::BqlCell; pub use crate::cell::BqlRefCell; +pub use crate::qdev::DeviceMethods; + pub use crate::qom::IsA; pub use crate::qom::Object; pub use crate::qom::ObjectCast; -- cgit 1.4.1