Re: [PATCH v2 3/8] rust: sync: add `Arc::{from_raw, into_raw}`

Gary Guo
2023-06-01T17:27:18Z

On Thu, 1 Jun 2023 13:49:41 +0000
Alice Ryhl <aliceryhl@google.com> wrote:

> From: Wedson Almeida Filho <walmeida@microsoft.com>
>
> These methods can be used to turn an `Arc` into a raw pointer and back,
> in a way that preserves the metadata for fat pointers.
>
> This is done using the unstable ptr_metadata feature [1]. However, it
> could also be done using the unstable pointer_byte_offsets feature [2],
> which is likely to have a shorter path to stabilization than
> ptr_metadata.
>
> Link: https://github.com/rust-lang/rust/issues/81513 [1]
> Link: https://github.com/rust-lang/rust/issues/96283 [2]
> Signed-off-by: Wedson Almeida Filho <walmeida@microsoft.com>
> Co-developed-by: Alice Ryhl <aliceryhl@google.com>
> Signed-off-by: Alice Ryhl <aliceryhl@google.com>
> Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>

Reviewed-by: Gary Guo <gary@garyguo.net>

> ---
> rust/kernel/lib.rs | 1 +
> rust/kernel/sync/arc.rs | 42 ++++++++++++++++++++++++++++++++++++++++-
> 2 files changed, 42 insertions(+), 1 deletion(-)