Package EDU.oswego.cs.dl.util.concurrent
Class SynchronizedShort
- java.lang.Object
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- EDU.oswego.cs.dl.util.concurrent.SynchronizedVariable
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- EDU.oswego.cs.dl.util.concurrent.SynchronizedShort
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- All Implemented Interfaces:
Executor
,java.lang.Cloneable
,java.lang.Comparable
- Direct Known Subclasses:
WaitableShort
public class SynchronizedShort extends SynchronizedVariable implements java.lang.Comparable, java.lang.Cloneable
A class useful for offloading synch for short instance variables.
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Field Summary
Fields Modifier and Type Field Description protected short
value_
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Fields inherited from class EDU.oswego.cs.dl.util.concurrent.SynchronizedVariable
lock_
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Constructor Summary
Constructors Constructor Description SynchronizedShort(short initialValue)
Make a new SynchronizedShort with the given initial value, and using its own internal lock.SynchronizedShort(short initialValue, java.lang.Object lock)
Make a new SynchronizedShort with the given initial value, and using the supplied lock.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description short
add(short amount)
Add amount to value (i.e., set value += amount)short
and(short b)
Set value to value & b.boolean
commit(short assumedValue, short newValue)
Set value to newValue only if it is currently assumedValue.int
compareTo(short other)
int
compareTo(SynchronizedShort other)
int
compareTo(java.lang.Object other)
short
complement()
Set the value to its complementshort
decrement()
Decrement the value.short
divide(short factor)
Divide value by factor (i.e., set value /= factor)boolean
equals(java.lang.Object other)
short
get()
Return the current valueint
hashCode()
short
increment()
Increment the value.short
multiply(short factor)
Multiply value by factor (i.e., set value *= factor)short
negate()
Set the value to the negative of its old valueshort
or(short b)
Set value to value | b.short
set(short newValue)
Set to newValue.short
subtract(short amount)
Subtract amount from value (i.e., set value -= amount)short
swap(SynchronizedShort other)
Atomically swap values with another SynchronizedShort.java.lang.String
toString()
short
xor(short b)
Set value to value ^ b.-
Methods inherited from class EDU.oswego.cs.dl.util.concurrent.SynchronizedVariable
execute, getLock
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Constructor Detail
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SynchronizedShort
public SynchronizedShort(short initialValue)
Make a new SynchronizedShort with the given initial value, and using its own internal lock.
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SynchronizedShort
public SynchronizedShort(short initialValue, java.lang.Object lock)
Make a new SynchronizedShort with the given initial value, and using the supplied lock.
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Method Detail
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get
public final short get()
Return the current value
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set
public short set(short newValue)
Set to newValue.- Returns:
- the old value
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commit
public boolean commit(short assumedValue, short newValue)
Set value to newValue only if it is currently assumedValue.- Returns:
- true if successful
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swap
public short swap(SynchronizedShort other)
Atomically swap values with another SynchronizedShort. Uses identityHashCode to avoid deadlock when two SynchronizedShorts 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
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increment
public short increment()
Increment the value.- Returns:
- the new value
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decrement
public short decrement()
Decrement the value.- Returns:
- the new value
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add
public short add(short amount)
Add amount to value (i.e., set value += amount)- Returns:
- the new value
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subtract
public short subtract(short amount)
Subtract amount from value (i.e., set value -= amount)- Returns:
- the new value
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multiply
public short multiply(short factor)
Multiply value by factor (i.e., set value *= factor)- Returns:
- the new value
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divide
public short divide(short factor)
Divide value by factor (i.e., set value /= factor)- Returns:
- the new value
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negate
public short negate()
Set the value to the negative of its old value- Returns:
- the new value
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complement
public short complement()
Set the value to its complement- Returns:
- the new value
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and
public short and(short b)
Set value to value & b.- Returns:
- the new value
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or
public short or(short b)
Set value to value | b.- Returns:
- the new value
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xor
public short xor(short b)
Set value to value ^ b.- Returns:
- the new value
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compareTo
public int compareTo(short other)
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compareTo
public int compareTo(SynchronizedShort other)
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compareTo
public int compareTo(java.lang.Object other)
- Specified by:
compareTo
in interfacejava.lang.Comparable
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equals
public boolean equals(java.lang.Object other)
- Overrides:
equals
in classjava.lang.Object
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hashCode
public int hashCode()
- Overrides:
hashCode
in classjava.lang.Object
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toString
public java.lang.String toString()
- Overrides:
toString
in classjava.lang.Object
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