Crate crossbeam

Tools for concurrent programming.

Atomics

• AtomicCell, a thread-safe mutable memory location.
• AtomicConsume, for reading from primitive atomic types with “consume” ordering.

Data structures

• deque, work-stealing deques for building task schedulers.
• ArrayQueue, a bounded MPMC queue that allocates a fixed-capacity buffer on construction.
• SegQueue, an unbounded MPMC queue that allocates small buffers, segments, on demand.

Memory management

• epoch, an epoch-based garbage collector.

Thread synchronization

• channel, multi-producer multi-consumer channels for message passing.
• Parker, a thread parking primitive.
• ShardedLock, a sharded reader-writer lock with fast concurrent reads.
• WaitGroup, for synchronizing the beginning or end of some computation.

Utilities

• Backoff, for exponential backoff in spin loops.
• CachePadded, for padding and aligning a value to the length of a cache line.
• scope, for spawning threads that borrow local variables from the stack.

Modules

atomic

Atomic types.

channel

Multi-producer multi-consumer channels for message passing.

deque

Concurrent work-stealing deques.

epoch

Epoch-based memory reclamation.

queue

Concurrent queues.

sync

Thread synchronization primitives.

thread

Threads that can borrow variables from the stack.

utils

Miscellaneous utilities.

Macros

select

Selects from a set of channel operations.

Functions

scope

Creates a new scope for spawning threads.