memory.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * Additional copyright for this file:
 * Copyright (C) 1994-1998 Revolution Software Ltd.
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef SWORD2_MEMORY_H
#define SWORD2_MEMORY_H

enum {
    MAX_MEMORY_BLOCKS = 999
};

namespace Sword2 {

struct MemBlock {
    int16 id;
    int16 uid;
    byte *ptr;
    uint32 size;
};

class MemoryManager {
private:
    MemBlock *_memBlocks;
    MemBlock **_memBlockIndex;
    int16 _numBlocks;

    uint32 _totAlloc;

    int16 *_idStack;
    int16 _idStackPtr;

    int16 findExactPointerInIndex(byte *ptr);
    int16 findPointerInIndex(byte *ptr);
    int16 findInsertionPointInIndex(byte *ptr);

public:
    MemoryManager();
    ~MemoryManager();

    int16 getNumBlocks() { return _numBlocks; }
    uint32 getTotAlloc() { return _totAlloc; }
    MemBlock *getMemBlocks() { return _memBlocks; }

    int32 encodePtr(byte *ptr);
    byte *decodePtr(int32 n);

    byte *memAlloc(uint32 size, int16 uid);
    void memFree(byte *ptr);
};

} // End of namespace Sword2

#endif