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Rollup merge of #153015 - joboet:atomic_alias_generic, r=jhpratt

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core: make atomic primitives type aliases of `Atomic<T>`

Tracking issue: https://github.com/rust-lang/rust/issues/130539

This makes `AtomicI32` and friends type aliases of `Atomic<T>` by encoding their alignment requirements via the use of an internal `Storage` associated type. This is also used to encode that `AtomicBool` store a `u8` internally.

Modulo the `Send`/`Sync` implementations, this PR does not move any trait implementations, methods or associated functions – I'll leave that for another PR.
This commit is contained in:
Jonathan Brouwer
2026-03-02 20:10:34 +01:00
committed by GitHub
parent 4a3d3cb486 e9ca34fe64
commit ef4cff2ea3
27 changed files with 315 additions and 330 deletions
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compiler/rustc_data_structures/src/marker.rs
+8 -3
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@@ -59,11 +59,16 @@ macro_rules! already_send {
// These structures are already `Send`.
already_send!(
[std::backtrace::Backtrace][std::io::Stdout][std::io::Stderr][std::io::Error][std::fs::File][std::panic::Location<'_>]
[rustc_arena::DroplessArena][jobserver_crate::Client][jobserver_crate::HelperThread]
[crate::memmap::Mmap][crate::profiling::SelfProfiler][crate::owned_slice::OwnedSlice]
[std::sync::atomic::AtomicBool][std::sync::atomic::AtomicUsize][std::sync::atomic::AtomicU8]
[std::sync::atomic::AtomicU32][std::backtrace::Backtrace][std::io::Stdout][std::io::Stderr]
[std::io::Error][std::fs::File][std::panic::Location<'_>][rustc_arena::DroplessArena]
[jobserver_crate::Client][jobserver_crate::HelperThread][crate::memmap::Mmap]
[crate::profiling::SelfProfiler][crate::owned_slice::OwnedSlice]
);
#[cfg(target_has_atomic = "64")]
already_send!([std::sync::atomic::AtomicU64]);
macro_rules! impl_dyn_send {
($($($attr: meta)* [$ty: ty where $($generics2: tt)*])*) => {
$(unsafe impl<$($generics2)*> DynSend for $ty {})*