[PATCH v2 03/14] rust: sync: add `Arc::as_ptr`

From: Andreas Hindborg
Date: Tue Sep 17 2024 - 18:32:18 EST


Add a method to get a pointer to the data contained in an `Arc`.

Signed-off-by: Andreas Hindborg <a.hindborg@xxxxxxxxxx>
---
rust/kernel/sync/arc.rs | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/rust/kernel/sync/arc.rs b/rust/kernel/sync/arc.rs
index 3673496c2363..a57ea3e2b44c 100644
--- a/rust/kernel/sync/arc.rs
+++ b/rust/kernel/sync/arc.rs
@@ -258,6 +258,14 @@ pub fn into_raw(self) -> *const T {
unsafe { core::ptr::addr_of!((*ptr).data) }
}

+ /// Return a raw pointer to the data in this arc.
+ pub fn as_ptr(&self) -> *const T {
+ let ptr = self.ptr.as_ptr();
+ // SAFETY: As we derive the pointer from a reference above, the pointer
+ // must be valid.
+ unsafe { core::ptr::addr_of!((*ptr).data) }
+ }
+
/// Recreates an [`Arc`] instance previously deconstructed via [`Arc::into_raw`].
///
/// # Safety
--
2.46.0