Messages in this thread Patch in this message | | | From | Boqun Feng <> | Subject | [RFC 4/5] rust: sync: impl Debug for {Unique,}Arc | Date | Wed, 1 Feb 2023 15:22:43 -0800 |
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This allows printing macros to print the data and the refcount nubmer of these struct for debugging purposes.
Signed-off-by: Boqun Feng <boqun.feng@gmail.com> --- rust/kernel/sync/arc.rs | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/rust/kernel/sync/arc.rs b/rust/kernel/sync/arc.rs index 4d8de20c996f..f143d8305c36 100644 --- a/rust/kernel/sync/arc.rs +++ b/rust/kernel/sync/arc.rs @@ -474,6 +474,7 @@ impl<T: ?Sized> Deref for ArcBorrow<'_, T> { /// /// # test().unwrap(); /// ``` +#[derive(Debug)] pub struct UniqueArc<T: ?Sized> { inner: Arc<T>, } @@ -545,3 +546,15 @@ impl<T: fmt::Display + ?Sized> fmt::Display for Arc<T> { fmt::Display::fmt(self.deref(), f) } } + +impl<T: fmt::Debug + ?Sized> fmt::Debug for Arc<T> { + /// Formats debug output for [`Arc`]. + /// + /// Refcount is also printed for debugging purpose. + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("Arc") + .field("refcount", &self.get_inner().count()) + .field("data", &self.deref()) + .finish() + } +} -- 2.39.1
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