+++ /dev/null
-package Analysis.TaskStateAnalysis;
-import Analysis.TaskStateAnalysis.*;
-import IR.*;
-import IR.Tree.*;
-import IR.Flat.*;
-import java.util.*;
-import java.io.*;
-import Util.GraphNode;
-
-/** This class is used to hold the flag states that a class in the Bristlecone
- * program can exist in, during runtime.
- */
-public class FlagState extends GraphNode {
- public static final int ONETAG=1;
- public static final int NOTAGS=0;
- public static final int MULTITAGS=-1;
-
- private int uid;
- private static int nodeid=0;
-
- private final HashSet flagstate;
- private final ClassDescriptor cd;
- private final Hashtable<TagDescriptor,Integer> tags;
- private boolean issourcenode;
- private Vector tasks;
-
- private boolean marked=false;
-
-
- /** Class constructor
- * Creates a new flagstate with all flags set to false.
- * @param cd ClassDescriptor
- */
- public FlagState(ClassDescriptor cd) {
- this.flagstate=new HashSet();
- this.cd=cd;
- this.tags=new Hashtable<TagDescriptor,Integer>();
- this.uid=FlagState.nodeid++;
- this.issourcenode=false;
- }
-
- /** Class constructor
- * Creates a new flagstate with flags set according to the HashSet.
- * If the flag exists in the hashset, it's set to true else set to false.
- * @param cd ClassDescriptor
- * @param flagstate a <CODE>HashSet</CODE> containing FlagDescriptors
- */
- private FlagState(HashSet flagstate, ClassDescriptor cd,Hashtable<TagDescriptor,Integer> tags) {
- this.flagstate=flagstate;
- this.cd=cd;
- this.tags=tags;
- this.uid=FlagState.nodeid++;
- this.issourcenode=false;
-
- }
-
- public int getuid() {
- return uid;
- }
-
- public boolean isMarked() {
- return marked;
- }
-
- public void doUnmarking() {
- marked = false;
- }
-
- public void doMarking() {
- marked = true;
- }
-
- /** Accessor method
- * @param fd FlagDescriptor
- * @return true if the flagstate contains fd else false.
- */
- public boolean get(FlagDescriptor fd) {
- return flagstate.contains(fd);
- }
-
- /** Checks if the flagstate is a source node.
- * @return true if the flagstate is a sourcenode(i.e. Is the product of an allocation site).
- */
-
- public boolean isSourceNode(){
- return issourcenode;
- }
-
- /** Sets the flagstate as a source node.
- */
- public void setAsSourceNode(){
- if(!issourcenode){
- issourcenode=true;
- this.tasks=new Vector();
- }
- }
-
- public void addAllocatingTask(TaskDescriptor task){
- tasks.add(task);
- }
-
- public Vector getAllocatingTasks(){
- return tasks;
- }
-
-
- public String toString() {
- return cd.toString()+getTextLabel();
- }
-
- /** @return Iterator over the flags in the flagstate.
- */
-
- public Iterator getFlags() {
- return flagstate.iterator();
- }
-
- public int numFlags(){
- return flagstate.size();
- }
-
- public FlagState[] setTag(TagDescriptor tag){
- HashSet newset1=(HashSet)flagstate.clone();
- Hashtable<TagDescriptor,Integer> newtags1=(Hashtable<TagDescriptor,Integer>)tags.clone();
-
- if (tags.containsKey(tag)){
- //Code could try to remove flag that doesn't exist
-
- switch (tags.get(tag).intValue()){
- case ONETAG:
- newtags1.put(tag,new Integer(MULTITAGS));
- return new FlagState[] {this, new FlagState(newset1, cd, newtags1)};
- case MULTITAGS:
- return new FlagState[] {this};
- default:
- throw new Error();
- }
- } else {
- newtags1.put(tag,new Integer(ONETAG));
- return new FlagState[] {new FlagState(newset1,cd,newtags1)};
- }
- }
-
- public int getTagCount(String tagtype){
- for (Enumeration en=getTags();en.hasMoreElements();){
- TagDescriptor td=(TagDescriptor)en.nextElement();
- if (tagtype.equals(td.getSymbol()))
- return tags.get(td).intValue(); //returns either ONETAG or MULTITAG
- }
- return NOTAGS;
- }
-
- public FlagState[] clearTag(TagDescriptor tag){
- if (tags.containsKey(tag)){
- switch(tags.get(tag).intValue()){
- case ONETAG:
- HashSet newset=(HashSet)flagstate.clone();
- Hashtable<TagDescriptor,Integer> newtags=(Hashtable<TagDescriptor,Integer>)tags.clone();
- newtags.remove(tag);
- return new FlagState[]{new FlagState(newset,cd,newtags)};
-
- case MULTITAGS:
- //two possibilities - count remains 2 or becomes 1
- //2 case
- HashSet newset1=(HashSet)flagstate.clone();
- Hashtable<TagDescriptor,Integer> newtags1=(Hashtable<TagDescriptor,Integer>)tags.clone();
-
- //1 case
- HashSet newset2=(HashSet)flagstate.clone();
- Hashtable<TagDescriptor,Integer> newtags2=(Hashtable<TagDescriptor,Integer>)tags.clone();
- newtags1.put(tag,new Integer(ONETAG));
- return new FlagState[] {new FlagState(newset1, cd, newtags2),
- new FlagState(newset2, cd, newtags2)};
- default:
- throw new Error();
- }
- } else {
- throw new Error("Invalid Operation: Can not clear a tag that doesn't exist.");
- }
- }
-
- /** Creates a string description of the flagstate
- * e.g. a flagstate with five flags could look like 01001
- * @param flags an array of flagdescriptors.
- * @return string representation of the flagstate.
- */
- public String toString(FlagDescriptor[] flags)
- {
- StringBuffer sb = new StringBuffer(flagstate.size());
- for(int i=0;i < flags.length; i++)
- {
- if (get(flags[i]))
- sb.append(1);
- else
- sb.append(0);
- }
-
- return new String(sb);
- }
-
- /** Accessor method
- * @return returns the classdescriptor of the flagstate.
- */
-
- public ClassDescriptor getClassDescriptor(){
- return cd;
- }
-
- /** Sets the status of a specific flag in a flagstate after cloning it.
- * @param fd FlagDescriptor of the flag whose status is being set.
- * @param status boolean value
- * @return the new flagstate with <CODE>fd</CODE> set to <CODE>status</CODE>.
- */
-
- public FlagState setFlag(FlagDescriptor fd, boolean status) {
- HashSet newset=(HashSet) flagstate.clone();
- Hashtable<TagDescriptor,Integer> newtags=(Hashtable<TagDescriptor,Integer>)tags.clone();
- if (status)
- newset.add(fd);
- else if (newset.contains(fd)){
- newset.remove(fd);
- }
-
- return new FlagState(newset, cd, newtags);
- }
-
- /** Tests for equality of two flagstate objects.
- */
-
- public boolean equals(Object o) {
- if (o instanceof FlagState) {
- FlagState fs=(FlagState)o;
- if (fs.cd!=cd)
- return false;
- return (fs.flagstate.equals(flagstate) & fs.tags.equals(tags));
- }
- return false;
- }
-
- public int hashCode() {
- return cd.hashCode()^flagstate.hashCode()^tags.hashCode();
- }
-
- public String getLabel() {
- return "N"+uid;
- }
-
-
-
-
- public String getTextLabel() {
- String label=null;
- for(Iterator it=getFlags();it.hasNext();) {
- FlagDescriptor fd=(FlagDescriptor) it.next();
- if (label==null)
- label=fd.toString();
- else
- label+=", "+fd.toString();
- }
- for (Enumeration en_tags=getTags();en_tags.hasMoreElements();){
- TagDescriptor td=(TagDescriptor)en_tags.nextElement();
- switch (tags.get(td).intValue()){
- case ONETAG:
- if (label==null)
- label=td.toString()+"(1)";
- else
- label+=", "+td.toString()+"(1)";
- break;
- case MULTITAGS:
- if (label==null)
- label=td.toString()+"(n)";
- else
- label+=", "+td.toString()+"(n)";
- break;
- default:
- break;
- }
- }
- if (label==null)
- return " ";
- return label;
- }
-
- public Enumeration getTags(){
- return tags.keys();
- }
-}
projects / IRC.git / blobdiff