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clarify RW lock's priority gotcha #82596

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bors merged 2 commits into from
Feb 28, 2021
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clarify RW lock's priority gotcha #82596

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d94b4e8
clarify RW lock's priority gotcha
matklad Feb 27, 2021
261c952
Update library/std/src/sync/rwlock.rs
matklad Feb 27, 2021
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4 changes: 3 additions & 1 deletion library/std/src/sync/rwlock.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,9 @@ use crate::sys_common::rwlock as sys;
///
/// The priority policy of the lock is dependent on the underlying operating
/// system's implementation, and this type does not guarantee that any
/// particular policy will be used.
/// particular policy will be used. In particular, a writer which is waiting to
/// acquire the lock in `write` might or might not block future calls to
/// `read`.
///
/// The type parameter `T` represents the data that this lock protects. It is
/// required that `T` satisfies [`Send`] to be shared across threads and
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