/*
* This file is part of the Jikes RVM project (http://jikesrvm.org).
*
* This file is licensed to You under the Eclipse Public License (EPL);
* You may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership.
*/
package org.jikesrvm.compilers.opt.instrsched;
import org.jikesrvm.compilers.opt.ir.Instruction;
import org.jikesrvm.compilers.opt.ir.InstructionEnumeration;
/**
* Instruction priority representation
* Used by the scheduler to enumerate over instructions
*
* @see Scheduler
*/
abstract class Priority implements InstructionEnumeration {
/**
* Resets the enumeration to the first instruction in sequence
*/
public abstract void reset();
/**
* Returns true if there are more instructions, false otherwise
*
* @return true if there are more instructions, false otherwise
*/
public abstract boolean hasMoreElements();
/**
* Returns the next instruction in sequence
*
* @return the next instruction in sequence
*/
public final Instruction nextElement() {
return next();
}
/**
* Returns the next instruction in sequence
*
* @return the next instruction in sequence
*/
public abstract Instruction next();
}