Package EDU.oswego.cs.dl.util.concurrent

Class SynchronizedDouble

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected double value_  

    • Constructor Summary

      Constructors 
      Constructor Description
      SynchronizedDouble​(double initialValue)
      Make a new SynchronizedDouble with the given initial value, and using its own internal lock.
      SynchronizedDouble​(double initialValue, java.lang.Object lock)
      Make a new SynchronizedDouble with the given initial value, and using the supplied lock.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      double add​(double amount)
      Add amount to value (i.e., set value += amount)
      boolean commit​(double assumedValue, double newValue)
      Set value to newValue only if it is currently assumedValue.
      int compareTo​(double other)  
      int compareTo​(SynchronizedDouble other)  
      int compareTo​(java.lang.Object other)  
      double divide​(double factor)
      Divide value by factor (i.e., set value /= factor)
      boolean equals​(java.lang.Object other)  
      double get()
      Return the current value
      int hashCode()  
      double multiply​(double factor)
      Multiply value by factor (i.e., set value *= factor)
      double set​(double newValue)
      Set to newValue.
      double subtract​(double amount)
      Subtract amount from value (i.e., set value -= amount)
      double swap​(SynchronizedDouble other)
      Atomically swap values with another SynchronizedDouble.
      java.lang.String toString()  

      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait

    • Field Detail

      • value_

        protected double value_

    • Constructor Detail

      • SynchronizedDouble

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

      • SynchronizedDouble

        public SynchronizedDouble​(double initialValue,
                          java.lang.Object lock)
        Make a new SynchronizedDouble with the given initial value, and using the supplied lock.

    • Method Detail

      • get

        public final double get()
        Return the current value

      • set

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

      • commit

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

      • swap

        public double swap​(SynchronizedDouble other)
        Atomically swap values with another SynchronizedDouble. Uses identityHashCode to avoid deadlock when two SynchronizedDoubles 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

      • add

        public double add​(double amount)
        Add amount to value (i.e., set value += amount)
        Returns:
        the new value

      • subtract

        public double subtract​(double amount)
        Subtract amount from value (i.e., set value -= amount)
        Returns:
        the new value

      • multiply

        public double multiply​(double factor)
        Multiply value by factor (i.e., set value *= factor)
        Returns:
        the new value

      • divide

        public double divide​(double factor)
        Divide value by factor (i.e., set value /= factor)
        Returns:
        the new value

      • compareTo

        public int compareTo​(double other)

      • compareTo

        public int compareTo​(java.lang.Object other)
        Specified by:
        compareTo in interface java.lang.Comparable

      • equals

        public boolean equals​(java.lang.Object other)
        Overrides:
        equals in class java.lang.Object

      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class java.lang.Object

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object