/*
* $Id$
*
* Copyright (C) 2003-2015 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.vm.classmgr;
import java.io.PrintWriter;
/**
* @author Ewout Prangsma (epr@users.sourceforge.net)
*/
public class VmStaticsAllocator extends VmStaticsBase {
private byte[] types;
private final int[] typeCounter = new int[MAX_TYPE + 1];
private int next;
private transient boolean locked;
/**
* Initialize this instance
*/
public VmStaticsAllocator(int size) {
this.types = new byte[size];
}
/**
* Allocate an entry.
*
* @param type
* @param length
* @return the index of the allocated entry.
*/
final synchronized int alloc(byte type, int length) {
if (locked) {
throw new RuntimeException("Locked");
}
final int idx = next;
types[idx] = type;
typeCounter[type]++;
next += length;
return idx;
}
/**
* Is the entry are the given offset of the given type?
*
* @param index
* @param type
* @return
*/
final void testType(int index, byte type) {
if (types[index] != type) {
throw new IllegalArgumentException("Type error " + types[index]);
}
}
/**
* Get the statics type at a given index
*
* @return int
*/
public final int getType(int index) {
return types[index];
}
final byte[] getTypes() {
return types;
}
final int getLength() {
return next;
}
final int getCapacity() {
return types.length;
}
public final void dumpStatistics(PrintWriter out) {
out.println(" #static int fields " + typeCounter[TYPE_INT]);
out.println(" #static long fields " + typeCounter[TYPE_LONG]);
out.println(" #methods " + typeCounter[TYPE_METHOD_CODE]);
out.println(" #types " + typeCounter[TYPE_CLASS]);
out.println(" table.length " + next);
}
}