[RFC 08/13] rust/qdev: add the macro to define bit property

[Zhao Liu <zhao1.liu@intel.com>]

HPET device (Rust device) needs to define the bit type property.

Add a variant of define_property macro to define bit type property.

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
---
 rust/qemu-api/src/qdev.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/rust/qemu-api/src/qdev.rs b/rust/qemu-api/src/qdev.rs
index 5e6580b6f261..66810803ec9d 100644
--- a/rust/qemu-api/src/qdev.rs
+++ b/rust/qemu-api/src/qdev.rs
@@ -103,6 +103,18 @@ fn class_init(dc: &mut DeviceClass) {
 
 #[macro_export]
 macro_rules! define_property {
+    ($name:expr, $state:ty, $field:ident, $prop:expr, $type:expr, bit = $bitnr:expr, default = $defval:expr$(,)*) => {
+        $crate::bindings::Property {
+            // use associated function syntax for type checking
+            name: ::std::ffi::CStr::as_ptr($name),
+            info: $prop,
+            offset: $crate::offset_of!($state, $field) as isize,
+            bitnr: $bitnr,
+            set_default: true,
+            defval: $crate::bindings::Property__bindgen_ty_1 { u: $defval as u64 },
+            ..$crate::zeroable::Zeroable::ZERO
+        }
+    };
     ($name:expr, $state:ty, $field:ident, $prop:expr, $type:expr, default = $defval:expr$(,)*) => {
         $crate::bindings::Property {
             // use associated function syntax for type checking
-- 
2.34.1