Messages in this thread Patch in this message | | | Date | Fri, 31 Mar 2023 21:52:46 +0000 | From | y86-dev@protonma ... | Subject | [PATCH v4 05/15] rust: types: add `Opaque::raw_get` |
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From: Benno Lossin <y86-dev@protonmail.com>
This function mirrors `UnsafeCell::raw_get`. It avoids creating a reference and allows solely using raw pointers. The `pin-init` API will be using this, since uninitialized memory requires raw pointers.
Signed-off-by: Benno Lossin <y86-dev@protonmail.com> Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Andreas Hindborg <a.hindborg@samsung.com> Reviewed-by: Alice Ryhl <aliceryhl@google.com> --- rust/kernel/types.rs | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/rust/kernel/types.rs b/rust/kernel/types.rs index 9d0fdbc55843..ff2b2fac951d 100644 --- a/rust/kernel/types.rs +++ b/rust/kernel/types.rs @@ -238,6 +238,14 @@ impl<T> Opaque<T> { pub fn get(&self) -> *mut T { UnsafeCell::raw_get(self.0.as_ptr()) } + + /// Gets the value behind `this`. + /// + /// This function is useful to get access to the value without creating intermediate + /// references. + pub const fn raw_get(this: *const Self) -> *mut T { + UnsafeCell::raw_get(this.cast::<UnsafeCell<T>>()) + } }
/// A sum type that always holds either a value of type `L` or `R`. -- 2.39.2
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