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

Class SynchronizedInt

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected int value_  

    • Constructor Summary

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

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int add​(int amount)
      Add amount to value (i.e., set value += amount)
      int and​(int b)
      Set value to value & b.
      boolean commit​(int assumedValue, int newValue)
      Set value to newValue only if it is currently assumedValue.
      int compareTo​(int other)  
      int compareTo​(SynchronizedInt other)  
      int compareTo​(java.lang.Object other)  
      int complement()
      Set the value to its complement
      int decrement()
      Decrement the value.
      int divide​(int factor)
      Divide value by factor (i.e., set value /= factor)
      boolean equals​(java.lang.Object other)  
      int get()
      Return the current value
      int hashCode()  
      int increment()
      Increment the value.
      int multiply​(int factor)
      Multiply value by factor (i.e., set value *= factor)
      int negate()
      Set the value to the negative of its old value
      int or​(int b)
      Set value to value | b.
      int set​(int newValue)
      Set to newValue.
      int subtract​(int amount)
      Subtract amount from value (i.e., set value -= amount)
      int swap​(SynchronizedInt other)
      Atomically swap values with another SynchronizedInt.
      java.lang.String toString()  
      int xor​(int b)
      Set value to value ^ b.

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • value_

        protected int value_

    • Constructor Detail

      • SynchronizedInt

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

      • SynchronizedInt

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

    • Method Detail

      • get

        public final int get()
        Return the current value

      • set

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

      • commit

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

      • swap

        public int swap​(SynchronizedInt other)
        Atomically swap values with another SynchronizedInt. Uses identityHashCode to avoid deadlock when two SynchronizedInts 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

      • increment

        public int increment()
        Increment the value.
        Returns:
        the new value

      • decrement

        public int decrement()
        Decrement the value.
        Returns:
        the new value

      • add

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

      • subtract

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

      • multiply

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

      • divide

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

      • negate

        public int negate()
        Set the value to the negative of its old value
        Returns:
        the new value

      • complement

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

      • and

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

      • or

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

      • xor

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

      • compareTo

        public int compareTo​(int 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