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