Commit 3ff6e785 authored by Benno Lossin's avatar Benno Lossin Committed by Miguel Ojeda
Browse files

rust: types: add `Opaque::raw_get` 



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: default avatarBenno Lossin <benno.lossin@proton.me>
Reviewed-by: default avatarGary Guo <gary@garyguo.net>
Reviewed-by: default avatarAndreas Hindborg <a.hindborg@samsung.com>
Reviewed-by: default avatarAlice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20230408122429.1103522-6-y86-dev@protonmail.com


Signed-off-by: default avatarMiguel Ojeda <ojeda@kernel.org>
parent d6dbca35

rust/kernel/types.rs

+8 −0
Original line number Diff line number Diff line
@@ -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`.