Google

JanosVM v0.6.0 Java API Documentation: Class GCPolicy
JanosVM v0.6.0 Java API

edu.utah.janosvm.resources
Class GCPolicy

java.lang.Object
  |
  +--edu.utah.janosvm.resources.GCPolicy

public class GCPolicy
extends java.lang.Object

Base class for objects that implement a specific policy for the GC.

Author:
Tim Stack, Utah Janos Team

Field Summary
protected  long max
          The maximum amount of memory available to this GC.
 
Constructor Summary
GCPolicy(long max)
          Construct a GCPolicy object with the given values.
 
Method Summary
static GCPolicy currentPolicy()
           
 boolean enable()
          The enable function is called just before the team is finished being initialized, so you have a chance to do something, like start the GC and finalizer threads.
 long initialTrigger()
           
 long newTrigger(long used, long freed)
          This function is called after a GC happened to determine the next time to do a GC.
 boolean startThreads()
           
 java.lang.String toString()
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

max

protected final long max
The maximum amount of memory available to this GC.
Constructor Detail

GCPolicy

public GCPolicy(long max)
Construct a GCPolicy object with the given values.
Parameters:
max - The maximum amount of memory available to the GC.
Method Detail

startThreads

public boolean startThreads()
Returns:
true if the GC was successful in starting all of its threads.

enable

public boolean enable()
The enable function is called just before the team is finished being initialized, so you have a chance to do something, like start the GC and finalizer threads.
Returns:
True if the enable was successful, false otherwise.

initialTrigger

public long initialTrigger()
Returns:
The initial number that should be used when trying to decide whether to do a GC or allocate more memory from the OS.

newTrigger

public long newTrigger(long used,
                       long freed)
This function is called after a GC happened to determine the next time to do a GC. The default is 1 1/3 times the current amount used.
Parameters:
used - The current amount of memory used.
freed - (Bogus at this time I think).
Returns:
The new trigger for the GC.

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object

currentPolicy

public static GCPolicy currentPolicy()
Returns:
The GCPolicy for the current team.

JanosVM v0.6.0 Java API

This documentation is Copyright (C) 2000-2002 The University of Utah. All Rights Reserved. See the documentation license for distribution terms and restrictions.
Documentation, software, and mailing lists for the JanosVM can be found at the Janos Project web page: http://www.cs.utah.edu/flux/janos/
Generated on Mar 17, 2002