Re: [PATCH v5 06/15] rust: add pin-init API core

Alice Ryhl
2023-04-03T17:57:21Z

On 4/3/23 17:45, Benno Lossin wrote:
> This API is used to facilitate safe pinned initialization of structs. It
> replaces cumbersome `unsafe` manual initialization with elegant safe macro
> invocations.
>
> Due to the size of this change it has been split into six commits:
> 1. This commit introducing the basic public interface: traits and
> functions to represent and create initializers.
> 2. Adds the `#[pin_data]`, `pin_init!`, `try_pin_init!`, `init!` and
> `try_init!` macros along with their internal types.
> 3. Adds the `InPlaceInit` trait that allows using an initializer to create
> an object inside of a `Box<T>` and other smart pointers.
> 4. Adds the `PinnedDrop` trait and adds macro support for it in
> the `#[pin_data]` macro.
> 5. Adds the `stack_pin_init!` macro allowing to pin-initialize a struct on
> the stack.
> 6. Adds the `Zeroable` trait and `init::zeroed` function to initialize
> types that have `0x00` in all bytes as a valid bit pattern.
>
> Co-developed-by: Gary Guo <gary@garyguo.net>
> Signed-off-by: Gary Guo <gary@garyguo.net>
> Signed-off-by: Benno Lossin <y86-dev@protonmail.com>
> Cc: Andreas Hindborg <a.hindborg@samsung.com>
> Cc: Alice Ryhl <aliceryhl@google.com>
> Cc: Wedson Almeida Filho <wedsonaf@gmail.com>

Reviewed-by: Alice Ryhl <aliceryhl@google.com>