javax.realtime
Class LTPrivateMemory

java.lang.Object
  javax.realtime.MemoryArea
      javax.realtime.ScopedMemory
          javax.realtime.PrivateScopedMemory
              javax.realtime.LTPrivateMemory

public class LTPrivateMemory

extends PrivateScopedMemory

The LTPrivateMemory provides linear time allocation time. This type of scoped memory allows only one thread at the time to be within it. Thus it can be considered as a thread private memory. If more than one thread try to access it at the same time a run-time exception is thrown.

Author:

Angelo Corsaro

Field Summary

Fields inherited from class javax.realtime.PrivateScopedMemory

owner

Fields inherited from class javax.realtime.ScopedMemory

joinSynchronizer

Fields inherited from class javax.realtime.MemoryArea

logic, parent, sizeInBytes

Constructor Summary

LTPrivateMemory(long size)
Creates a new LTPrivateMemory instance.

LTPrivateMemory(long minSize, long maxSize)
Creates a new LTPrivateMemory instance.

LTPrivateMemory(long size, Runnable logic)
Creates a new LTPrivateMemory instance.

LTPrivateMemory(SizeEstimator size)
Creates a new LTPrivateMemory instance.

LTPrivateMemory(SizeEstimator size, Runnable logic)
Creates a new LTPrivateMemory instance.

Method Summary

protected void	fini()
protected void	init()
long	memoryConsumed() An exact count, in bytes, of the all of the memory currently used by the system for the allocated objects.
long	memoryRemaining() An approximation to the total amount of memory currently available for future allocated objects, measured in bytes.

Methods inherited from class javax.realtime.PrivateScopedMemory

enter, join, join, joinAndEnter, joinAndEnter, joinAndEnter, joinAndEnter, resetOwner, setOwner, toString

Methods inherited from class javax.realtime.ScopedMemory

getMaximumSize, getPortal, getReferenceCount, setPortal

Methods inherited from class javax.realtime.MemoryArea

enter, executeInArea, finalize, getMemoryArea, guardedRun, newArray, newInstance, newInstance, size

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

LTPrivateMemory

public LTPrivateMemory(long minSize,
                       long maxSize)

Creates a new LTPrivateMemory instance.

Parameters:

minSize - a long value representing the minimum size for this memory.

maxSize - a long value representing the max size for this memory area.

LTPrivateMemory

public LTPrivateMemory(long size)

Creates a new LTPrivateMemory instance.

Parameters:

size - The size of MemoryArea to allocate, in bytes. If size is less than or equal to zero an IllegalArgumentException is thrown.

LTPrivateMemory

public LTPrivateMemory(long size,
                       Runnable logic)

Creates a new LTPrivateMemory instance.

Parameters:

size - The size of MemoryArea to allocate, in bytes. If size is less than or equal to zero an IllegalArgumentException is thrown.

logic - -The java.lang.Runnable whose run() method is invoked when any of the variations of enter() which do not take a java.lang.Runnable is called.

LTPrivateMemory

public LTPrivateMemory(SizeEstimator size)

Creates a new LTPrivateMemory instance.

Parameters:

size - A SizeEstimator object which indicates the amount of memory required by this MemoryArea.

LTPrivateMemory

public LTPrivateMemory(SizeEstimator size,
                       Runnable logic)

Creates a new LTPrivateMemory instance.

Parameters:

size - The size of MemoryArea to allocate, in bytes.

logic - The run() method of this object will be called whenever enter() called.

Method Detail

memoryConsumed

public long memoryConsumed()

An exact count, in bytes, of the all of the memory currently used by the system for the allocated objects.

Specified by:

memoryConsumed in class MemoryArea

Returns:

The amount of memory consumed in bytes.

memoryRemaining

public long memoryRemaining()

An approximation to the total amount of memory currently available for future allocated objects, measured in bytes.

Specified by:

memoryRemaining in class MemoryArea

Returns:

The amount of remaining memory in bytes.

init

protected void init()

Specified by:

init in class MemoryArea

fini

protected void fini()

Specified by:

fini in class MemoryArea