Class SynchronizedBoolean

java.lang.Object
EDU.oswego.cs.dl.util.concurrent.SynchronizedVariable
EDU.oswego.cs.dl.util.concurrent.SynchronizedBoolean
All Implemented Interfaces:
Executor, Cloneable, Comparable
Direct Known Subclasses:
WaitableBoolean
public class SynchronizedBoolean extends SynchronizedVariable implements Comparable, Cloneable
A class useful for offloading synch for boolean instance variables.

[ Introduction to this package. ]

  • Field Details

    • value_

      protected boolean value_

  • Constructor Details

    • SynchronizedBoolean

      public SynchronizedBoolean(boolean initialValue)
      Make a new SynchronizedBoolean with the given initial value, and using its own internal lock.

    • SynchronizedBoolean

      public SynchronizedBoolean(boolean initialValue, Object lock)
      Make a new SynchronizedBoolean with the given initial value, and using the supplied lock.

  • Method Details

    • get

      public final boolean get()
      Return the current value

    • set

      public boolean set(boolean newValue)
      Set to newValue.
      Returns:
      the old value

    • commit

      public boolean commit(boolean assumedValue, boolean newValue)
      Set value to newValue only if it is currently assumedValue.
      Returns:
      true if successful

    • swap

      public boolean swap(SynchronizedBoolean other)
      Atomically swap values with another SynchronizedBoolean. Uses identityHashCode to avoid deadlock when two SynchronizedBooleans attempt to simultaneously swap with each other. (Note: Ordering via identyHashCode is not strictly guaranteed by the language specification to return unique, orderable values, but in practice JVMs rely on them being unique.)
      Returns:
      the new value

    • complement

      public boolean complement()
      Set the value to its complement
      Returns:
      the new value

    • and

      public boolean and(boolean b)
      Set value to value & b.
      Returns:
      the new value

    • or

      public boolean or(boolean b)
      Set value to value | b.
      Returns:
      the new value

    • xor

      public boolean xor(boolean b)
      Set value to value ^ b.
      Returns:
      the new value

    • compareTo

      public int compareTo(boolean other)

    • compareTo

      public int compareTo(SynchronizedBoolean other)

    • compareTo

      public int compareTo(Object other)
      Specified by:
      compareTo in interface Comparable

    • equals

      public boolean equals(Object other)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • toString

      public String toString()
      Overrides:
      toString in class Object