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//! Miscellaneous tools for concurrent programming.
//!
//! ## Atomics
//!
//! * [`AtomicCell`], a thread-safe mutable memory location.
//! * [`AtomicConsume`], for reading from primitive atomic types with "consume" ordering.
//!
//! ## Thread synchronization
//!
//! * [`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.
//!
//! [`AtomicCell`]: atomic/struct.AtomicCell.html
//! [`AtomicConsume`]: atomic/trait.AtomicConsume.html
//! [`Parker`]: sync/struct.Parker.html
//! [`ShardedLock`]: sync/struct.ShardedLock.html
//! [`WaitGroup`]: sync/struct.WaitGroup.html
//! [`Backoff`]: struct.Backoff.html
//! [`CachePadded`]: struct.CachePadded.html
//! [`scope`]: thread/fn.scope.html
extern crate cfg_if;
extern crate core;
cfg_if!
pub use CachePadded;
pub use Backoff;
cfg_if!