javax.realtime
Class MemoryParameters

java.lang.Object
  javax.realtime.MemoryParameters

public class MemoryParameters

extends java.lang.Object

Memory parameters can be given on the constructor of RealTimeThread and AsynchEventHandler. These can be used both for the purposes of admission control by the scheduler and for the purposes of pacing the garbage collector to satisfy all of the thread allocation rates.

When a reference to a MemoryParameters object is given as a parameter to a constructor, the MemoryParameters object becomes bound to the object being created. Changes to the values in the MemoryParameters object affect the constructed object. If given to more than one constructor, then changes to the values in the MemoryParameters object affect all of the associated objects. Note that this is a one-many relationship and not a many-to-many.

Caution: This class is explicitly unsafe in multithreaded situations when it is being changed. No synchronization is done. It is assumed that users of this class who are mutating instances will be doing their own synchronization at a higher level.

Field Summary

static long

NO_MAX

Constructor Summary

MemoryParameters(long maxMemoryArea, long maxImmortal)

MemoryParameters(long maxMemoryArea, long maxImmortal, long allocationRate)

Method Summary

long	getAllocationRate()
long	getMaxImmortal()
long	getMaxMemoryArea()
void	setAllocationRate(long allocationRate)
boolean	setMaxImmortalIfFeasible(long maxImmortal)
boolean	setMaxMemoryAreaIfFeasible(long maxMemoryArea)

Methods inherited from class java.lang.Object

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

Field Detail

NO_MAX

public static final long NO_MAX

See Also:

Constant Field Values

Constructor Detail

MemoryParameters

public MemoryParameters(long maxMemoryArea,
                        long maxImmortal)
                 throws java.lang.IllegalArgumentException

Parameters:

maxMemoryArea -

maxImmortal -

Throws:

java.lang.IllegalArgumentException

MemoryParameters

public MemoryParameters(long maxMemoryArea,
                        long maxImmortal,
                        long allocationRate)
                 throws java.lang.IllegalArgumentException

Parameters:

maxMemoryArea -

maxImmortal -

allocationRate -

Throws:

java.lang.IllegalArgumentException

Method Detail

getAllocationRate

public long getAllocationRate()

Returns:

the allocation rate

getMaxImmortal

public long getMaxImmortal()

Returns:

the maximum immortal area size

getMaxMemoryArea

public long getMaxMemoryArea()

Returns:

the maximum memory area size

setAllocationRate

public void setAllocationRate(long allocationRate)

Parameters:

allocationRate -

setMaxImmortalIfFeasible

public boolean setMaxImmortalIfFeasible(long maxImmortal)

Parameters:

maxImmortal -

Returns:

true if the resulting system is feasible

setMaxMemoryAreaIfFeasible

public boolean setMaxMemoryAreaIfFeasible(long maxMemoryArea)

Parameters:

maxMemoryArea -

Returns:

true if the resulting system is feasible