edu.syr.pcpratts.rootbeer.runtime.Serializer.java Source code

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Here is the source code for edu.syr.pcpratts.rootbeer.runtime.Serializer.java

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/*
 * This file is part of Rootbeer.
 * 
 * Rootbeer is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * Rootbeer 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with Rootbeer.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */

package edu.syr.pcpratts.rootbeer.runtime;

import edu.syr.pcpratts.rootbeer.runtime.memory.Memory;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.IdentityHashMap;
import java.util.Map;
import java.util.TreeMap;
import org.apache.commons.collections.map.IdentityMap;

public abstract class Serializer {

    public Memory mMem;
    public Memory mTextureMem;

    private static final Map<Object, Long> mWriteToGpuCache;
    private static final Map<Long, Object> mReadFromGpuCache;

    private ReadOnlyAnalyzer m_Analyzer;

    static {
        mWriteToGpuCache = new IdentityMap();
        mReadFromGpuCache = new HashMap<Long, Object>();
    }

    public Serializer(Memory mem, Memory texture_mem) {
        mMem = mem;
        mTextureMem = texture_mem;
        mReadFromGpuCache.clear();
        mWriteToGpuCache.clear();
    }

    public void setAnalyzer(ReadOnlyAnalyzer analyzer) {
        m_Analyzer = analyzer;
    }

    public void writeStaticsToHeap() {
        doWriteStaticsToHeap();
    }

    public long writeToHeap(Object o) {
        return writeToHeap(o, true);
    }

    private class WriteCacheResult {
        public long m_Ref;
        public boolean m_NeedToWrite;

        public WriteCacheResult(long ref, boolean need_to_write) {
            m_Ref = ref;
            m_NeedToWrite = need_to_write;
        }
    }

    private WriteCacheResult checkWriteCache(Object o, int size, boolean read_only) {
        synchronized (mWriteToGpuCache) {
            if (mWriteToGpuCache.containsKey(o)) {
                long ref = mWriteToGpuCache.get(o);
                return new WriteCacheResult(ref, false);
            }
            Memory mem;
            if (read_only) {
                mem = mTextureMem;
            } else {
                mem = mMem;
            }
            long ref = mem.mallocWithSize(size);
            mWriteToGpuCache.put(o, ref);
            return new WriteCacheResult(ref, true);
        }
    }

    public long writeToHeap(Object o, boolean write_data) {
        if (o == null)
            return -1;
        int size = doGetSize(o);
        boolean read_only = false;
        WriteCacheResult result;
        result = checkWriteCache(o, size, read_only);
        if (result.m_NeedToWrite == false)
            return result.m_Ref;
        doWriteToHeap(o, write_data, result.m_Ref, read_only);
        return result.m_Ref;
    }

    protected Object checkCache(long address, Object item) {
        synchronized (mReadFromGpuCache) {
            if (mReadFromGpuCache.containsKey(address)) {
                return mReadFromGpuCache.get(address);
            } else {
                mReadFromGpuCache.put(address, item);
                return item;
            }
        }
    }

    public Object readFromHeap(Object o, boolean read_data, long address) {
        synchronized (mReadFromGpuCache) {
            if (mReadFromGpuCache.containsKey(address)) {
                Object ret = mReadFromGpuCache.get(address);
                return ret;
            }
        }
        long null_ptr_check = address >> 4;
        if (null_ptr_check == -1) {
            return null;
        }
        Object ret = doReadFromHeap(o, read_data, address);
        return checkCache(address, ret);
    }

    public void readStaticsFromHeap() {
        doReadStaticsFromHeap();
    }

    public Object readField(Object base, String name) {
        Class cls = base.getClass();
        while (true) {
            try {
                Field f = cls.getDeclaredField(name);
                f.setAccessible(true);
                return f.get(base);
            } catch (Exception ex) {
                cls = cls.getSuperclass();
            }
        }
    }

    public Object readStaticField(Class cls, String name) {
        while (true) {
            try {
                Field f = cls.getDeclaredField(name);
                f.setAccessible(true);
                Object ret = f.get(null);
                return ret;
            } catch (Exception ex) {
                cls = cls.getSuperclass();
            }
        }
    }

    public void writeField(Object base, String name, Object value) {
        Class cls = base.getClass();
        while (true) {
            try {
                Field f = cls.getDeclaredField(name);
                f.setAccessible(true);
                f.set(base, value);
                return;
            } catch (Exception ex) {
                cls = cls.getSuperclass();
            }
        }
    }

    public void writeStaticField(Class cls, String name, Object value) {
        while (true) {
            try {
                Field f = cls.getDeclaredField(name);
                f.setAccessible(true);
                f.set(null, value);
                return;
            } catch (Exception ex) {
                cls = cls.getSuperclass();
            }
        }
    }

    public abstract void doWriteToHeap(Object o, boolean write_data, long ref, boolean read_only);

    public abstract void doWriteStaticsToHeap();

    public abstract Object doReadFromHeap(Object o, boolean read_data, long ref);

    public abstract void doReadStaticsFromHeap();

    public abstract int doGetSize(Object o);
}