Packages

class AtomicBarrier extends AnyRef

An atomic barrier is similar to a countdown latch, except that the content is a state transition system with semantic meaning instead of a simple counter.

It is designed with a single writer ("unblocker") thread and a single reader ("waiter") thread in mind. It is concurrency safe with more writers and readers, but using more is likely to cause race conditions for legal transitions. That is to say, trying to perform an otherwise legal transition twice is illegal and may occur if there is more than one unblocker or waiter thread. Having additional passive state observers that only call load() is never an issue.

Legal transitions are: - BLOCKED -> UNBLOCKED - BLOCKED -> REQUESTED - REQUESTED -> UNBLOCKED - UNBLOCKED -> PASSED

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Instance Constructors

  1. new AtomicBarrier()

Value Members

  1. final def !=(arg0: Any): Boolean
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  2. final def ##: Int
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  3. final def ==(arg0: Any): Boolean
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  4. final def asInstanceOf[T0]: T0
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  5. def clone(): AnyRef
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    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  6. final def eq(arg0: AnyRef): Boolean
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  7. def equals(arg0: AnyRef): Boolean
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  8. def finalize(): Unit
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    @throws(classOf[java.lang.Throwable])
  9. final def getClass(): Class[_ <: AnyRef]
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    @native()
  10. def hashCode(): Int
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    @native()
  11. final def isInstanceOf[T0]: Boolean
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  12. def load(): State

    Get the current state.

  13. final def ne(arg0: AnyRef): Boolean
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  14. final def notify(): Unit
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    @native()
  15. final def notifyAll(): Unit
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    @native()
  16. final def synchronized[T0](arg0: => T0): T0
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  17. def toString(): String
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  18. def unblock(): Unit

    Transition to the Unblocked state.

  19. final def wait(): Unit
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    @throws(classOf[java.lang.InterruptedException])
  20. final def wait(arg0: Long, arg1: Int): Unit
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    @throws(classOf[java.lang.InterruptedException])
  21. final def wait(arg0: Long): Unit
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    @throws(classOf[java.lang.InterruptedException]) @native()
  22. def waitToPass(): Unit

    Wait until this barrier can be passed and then mark it as Passed.

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