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| author | Christian Schrefl <chrisi.schrefl@gmail.com> | 2025-04-21 22:18:06 +0000 |
|---|---|---|
| committer | Benno Lossin <benno.lossin@proton.me> | 2025-05-01 18:13:56 +0200 |
| commit | b862aac8fd46601fa20226c9f5d6c6d308678b4d (patch) | |
| tree | 583de3eec0aa42ea5664e823dd961afd53e4f850 | |
| parent | 2f7c73825f8f435ebdfb2cfa3b01cfa2b1c79041 (diff) | |
rust: pin-init: Implement `Wrapper` for `UnsafePinned` behind feature flag.
Add the `unsafe-pinned` feature which gates the `Wrapper`
implementation of the `core::pin::UnsafePinned` struct.
For now this is just a cargo feature, but once `core::pin::UnsafePinned`
is stable a config flag can be added to allow the usage of this
implementation in the linux kernel.
Signed-off-by: Christian Schrefl <chrisi.schrefl@gmail.com>
Link: https://github.com/Rust-for-Linux/pin-init/pull/37/commits/99cb1934425357e780ea5b0628f66633123847b8
[ Fixed commit authorship. - Benno ]
Signed-off-by: Benno Lossin <benno.lossin@proton.me>
| -rw-r--r-- | rust/pin-init/src/lib.rs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/rust/pin-init/src/lib.rs b/rust/pin-init/src/lib.rs index 467ccc8bd616..745cf534d239 100644 --- a/rust/pin-init/src/lib.rs +++ b/rust/pin-init/src/lib.rs @@ -269,6 +269,10 @@ #![forbid(missing_docs, unsafe_op_in_unsafe_fn)] #![cfg_attr(not(feature = "std"), no_std)] #![cfg_attr(feature = "alloc", feature(allocator_api))] +#![cfg_attr( + all(feature = "unsafe-pinned", CONFIG_RUSTC_HAS_UNSAFE_PINNED), + feature(unsafe_pinned) +)] use core::{ cell::UnsafeCell, @@ -1557,3 +1561,11 @@ impl<T> Wrapper<T> for MaybeUninit<T> { unsafe { cast_pin_init(value_init) } } } + +#[cfg(all(feature = "unsafe-pinned", CONFIG_RUSTC_HAS_UNSAFE_PINNED))] +impl<T> Wrapper<T> for core::pin::UnsafePinned<T> { + fn pin_init<E>(init: impl PinInit<T, E>) -> impl PinInit<Self, E> { + // SAFETY: `UnsafePinned<T>` has a compatible layout to `T`. + unsafe { cast_pin_init(init) } + } +} |