Classes

Atomic is a class that allows for atomic loading and storing of objects.atomic

var ai = Atomic<Int>(15)
ai += 10
print(ai) // prints 25

There are a number of helper aliases for common types such as IntA, StringA, BoolA

var ai = IntA(15)
ai += 10
print(ai) // prints 25

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public class Atomic<T> : CustomStringConvertible

A Mutex is a mutual exclusion lock.

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public class Mutex

Cond implements a condition variable, a rendezvous point for an operation waiting for or announcing the occurrence of an event.

Each Cond has an associated Mutex, which must be held when changing the condition and when calling the wait method.

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public class Cond

Once is an object that will perform exactly one action.

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public class Once

A WaitGroup waits for a collection of operations to finish. The main operation calls ‘add’ to set the number of operation to wait for. Then each of the operations runs and calls ‘done’ when finished. At the same time, 'wait’ can be used to block until all operations have finished.

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public class WaitGroup

Channels are the pipes that connect concurrent operations. You can send values into channels from one operation and receive those values into another operation.

var messages = Chan<String>()
dispatch {
    messages <- "ping"
}
if let msg := <-messages {
    println(msg)
}

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public class Chan<T> : SequenceType