Crossbeam: support for concurrent and parallel programming

This crate is an early work in progress. The focus for the moment is concurrency:

Non-blocking data structures. These data structures allow for high performance, highly-concurrent access, much superior to wrapping with a Mutex. Ultimately the goal is to include stacks, queues, deques, bags, sets and maps.
Memory management. Because non-blocking data structures avoid global synchronization, it is not easy to tell when internal data can be safely freed. The mem module provides generic, easy to use, and high-performance APIs for managing memory in these cases.
Synchronization. The standard library provides a few synchronization primitives (locks, semaphores, barriers, etc) but this crate seeks to expand that set to include more advanced/niche primitives, as well as userspace alternatives.
Scoped thread API. Finally, the crate provides a "scoped" thread API, making it possible to spawn threads that share stack data with their parents.

Usage

To use Crossbeam, add this to your Cargo.toml:

[dependencies]
crossbeam = "0.2"

For examples of what Crossbeam is capable of, see the documentation.