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compiler/rustc_data_structures/src/sync.rs: delete MappedLockGuard

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It seems it is left-over after some refactoring
This commit is contained in:
Askar Safin 2025-02-11 08:14:00 +03:00
parent 25b6761c9e
commit c9c7b44510
2 changed files with 2 additions and 4 deletions
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5
compiler/rustc_data_structures/src/sync.rs
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@ -112,9 +112,8 @@ pub use std::sync::{OnceLock, Weak};
pub use mode::{is_dyn_thread_safe, set_dyn_thread_safe_mode};
pub use parking_lot::{
MappedMutexGuard as MappedLockGuard, MappedRwLockReadGuard as MappedReadGuard,
MappedRwLockWriteGuard as MappedWriteGuard, RwLockReadGuard as ReadGuard,
RwLockWriteGuard as WriteGuard,
MappedRwLockReadGuard as MappedReadGuard, MappedRwLockWriteGuard as MappedWriteGuard,
RwLockReadGuard as ReadGuard, RwLockWriteGuard as WriteGuard,
};
#[cfg(not(target_has_atomic = "64"))]
pub use portable_atomic::AtomicU64;

1
src/doc/rustc-dev-guide/src/parallel-rustc.md
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@ -58,7 +58,6 @@ are implemented differently depending on whether `parallel-compiler` is true.
| WriteGuard | parking_lot::RwLockWriteGuard | std::cell::RefMut |
| MappedWriteGuard | parking_lot::MappedRwLockWriteGuard | std::cell::RefMut |
| LockGuard | parking_lot::MutexGuard | std::cell::RefMut |
| MappedLockGuard | parking_lot::MappedMutexGuard | std::cell::RefMut |
- These thread-safe data structures are interspersed during compilation which
can cause lock contention resulting in degraded performance as the number of