Packages

  • package root
    Definition Classes
    root
  • package io

    This is the documentation for the ThreadCSO Library.

    This is the documentation for the ThreadCSO Library. Notable packages include:

    Definition Classes
    root
  • package threadcso

    The standard threadCSO API.

    The standard threadCSO API. Most modules using CSO will need only the declaration:

    import io.threadcso._

    The present version of the ThreadCSO library API is 1.2Rr (for some number r)

    The revision number (Rr) will change if bugs are corrected but the code remains consistent with the previous API. Its minor version number will change if there is a correction to the code that breaks consistency with the previous API. Its major version will change if there is a substantial change in the semantics of an important CSO construct.

    August 2017: changes 1.1 => 1.2

    • renaming of very many internal classes and packages
    • basic channel implementations are more efficient, in some case much more so
    • alternation reliability improved
    • debugger registration of alternations is no longer needed
    • home-grown semaphores can specify which component they are part of: this makes interpreting a stack backtrace very much easier
    • there is a flexible logging system that is compatible with the debugger

    April 2016: changes 1.0 => 1.1

    • Extended rendezvous read operator is now ?? (was ?)
    • Extended rendezvous read event notation is now =??=> (was =?=>>)
    • The notation inport ? f is now equivalent to f(inport?()) This makes for a tidier layout when the function f is an explicit functional expression.

    Feb 1 2017: changes 1.1R1 => 1.1R2

    • Removed dependencies on deprecated Java->Scala functions: replaced with .asJava
    @author Bernard Sufrin, Oxford
    $Revision: 286 $
    $Date: 2017-11-18 17:41:30 +0000 (Sat, 18 Nov 2017) $
    Definition Classes
    io
  • package semaphore
    Definition Classes
    threadcso
  • package jdk
    Definition Classes
    semaphore
  • BooleanSemaphore
  • CountingSemaphore
  • FastFlag
  • Flag
  • Latch
  • Semaphore

class Flag extends Semaphore

A synchronization object that supports a single thread waiting until some other thread enables it to proceed. Functionally equivalent to (but considerably more efficient than) a BooleanSemaphore(false) that can be released once.

Linear Supertypes
Semaphore, AnyRef, Any
Ordering
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Inherited
  1. Flag
  2. Semaphore
  3. AnyRef
  4. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new Flag(name: String = null)

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. def acquire(): Unit

    Causes the current thread to wait until the flag is available.

    Causes the current thread to wait until the flag is available. It is an error to invoke acquire or tryAcquire more than once on an unavailable flag.

    Definition Classes
    FlagSemaphore
  5. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  6. def cancel(): Unit

    Interrupt a stalled acquiring thread

    Interrupt a stalled acquiring thread

    Definition Classes
    FlagSemaphore
  7. def cancelled(): Boolean

    True if the most recent semaphore acquisition was cancelled

    True if the most recent semaphore acquisition was cancelled

    Definition Classes
    FlagSemaphore
  8. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  9. def down(): Unit

    same as acquire

    same as acquire

    Definition Classes
    Semaphore
    Annotations
    @inline()
  10. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  11. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  12. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  13. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
  14. def getWaiting: Seq[Thread]

    Return an (approximate) list of the threads waiting to acquire a token from this semaphore.

    Return an (approximate) list of the threads waiting to acquire a token from this semaphore. Intended for use only by diagnostic components.

    Definition Classes
    Semaphore
  15. def hashCode(): Int
    Definition Classes
    AnyRef → Any
  16. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  17. var name: String
  18. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  19. final def notify(): Unit
    Definition Classes
    AnyRef
  20. final def notifyAll(): Unit
    Definition Classes
    AnyRef
  21. def release(): Unit

    Raise the flag; permitting an acquireing process to proceed.

    Raise the flag; permitting an acquireing process to proceed. It is an error for a Flag that has already been released to be released again.

    Definition Classes
    FlagSemaphore
  22. def remaining(): Int

    Approximation to the number of acquires that could now succeed without having to wait.

    Approximation to the number of acquires that could now succeed without having to wait. Intended for use only by diagnostic components.

    Definition Classes
    Semaphore
  23. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  24. def toString(): String
    Definition Classes
    Flag → AnyRef → Any
  25. def tryAcquire(timeoutNS: Long): Boolean

    Causes the current thread to wait until the flag is released (returning true) or until the specified timeout has elapsed (returning false).

    Causes the current thread to wait until the flag is released (returning true) or until the specified timeout has elapsed (returning false). It is an error to invoke acquire or tryAcquire more than once on an unavaliable flag.

    Definition Classes
    FlagSemaphore
  26. def up(): Unit

    same as release

    same as release

    Definition Classes
    Semaphore
    Annotations
    @inline()
  27. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  28. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  29. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from Semaphore

Inherited from AnyRef

Inherited from Any

Ungrouped