NewYour coding agent can read the release notes before it upgrades.Set up the MCP server →
crates.io · #3828 most downloaded on crates.io
A runtime-agnostic library providing essential synchronization primitives for asynchronous Rust programming.
Last release 1 months ago
13 Aug 2026
Release timing varies
gaps range from 8 days to 4 months
Rarely documented
notes for 9 of 37 stable releases
4 versions withdrawn
withdrawn after publishing
2 years old
41 releases · first in 2024
One column per month.
chore: Release mea version 0.6.7
chore: Release mea version 0.6.7
chore: Release mea version 0.6.6
chore: Release mea version 0.6.6
OwnedMappedMutexGuard from allowing invalid lifetime coercions. (#121)OwnedRwLockReadGuard to be both Send and Sync before the guard can be sent across threads. (#122)Barrier, Latch, WaitGroup, Once, and broadcast::overflow operations. (#125)Once initialization. (#126)WaitGroup panic on counter overflow instead of silently losing track of a handle. (#128)Condvar with standard non-buffered notification semantics by notifying only current waiters and passing a cancelled notify_one wakeup to another current waiter. (#132)oneshot receive does not wait for the sender to make progress. (#138)OnceMap and singleflight::Group entries once no callers remain after a failure, panic, or cancellation. (#142)Semaphore::release panics on overflow. (#144)Clone bounds from singleflight::Group keys and custom hashers used by OnceMap and singleflight::Group. (#142)chore: Release mea version 0.6.5
chore: Release mea version 0.6.5
admission::FairShare to provide a work-conserving admission policy for workloads partitioned by key.chore: Release mea version 0.6.4
chore: Release mea version 0.6.4
shutdown::ShutdownWatch to wait for the shutdown signal without blocking ShutdownSend::await_shutdown.chore: Release mea version 0.6.3
chore: Release mea version 0.6.3
chore: Release mea version 0.6.2
chore: Release mea version 0.6.2
once::OnceMap to run computation only once and store the results in a hash map.singleflight::Group now supports custom hashers for keys.singleflight::Group::forget now accepts any &Q where Q: ?Sized + Hash + Eq and K: Borrow<Q> aligning with standard HashMap's interface.chore: Release mea version 0.6.1
chore: Release mea version 0.6.1
singleflight pattern for deduplicating concurrent requests.chore: Release mea version 0.6.0
chore: Release mea version 0.6.0
[Try](Send|Recv)Error pattern. (#98)broadcast::channel and the related types are moved to one level deeper module broadcast::overflow. (#99)oneshot::Sender and oneshot::Receiver now always implement Debug.chore: Release mea version 0.5.3
chore: Release mea version 0.5.3
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Your coding agent can read these notes before it upgrades. Set up the MCP server →