memman.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.
 *
 * 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 SWORD1_MEMMAN_H
#define SWORD1_MEMMAN_H

#include "common/scummsys.h"

namespace Sword1 {

struct MemHandle {
    void *data;
    uint32 size;
    uint32 refCount;
    uint16 cond;
    MemHandle *next, *prev;
};
// mem conditions:
#define MEM_FREED       0
#define MEM_CAN_FREE    1
#define MEM_DONT_FREE   2

#define MAX_ALLOC (6*1024*1024) // max amount of mem we want to alloc().

class MemMan {
public:
    MemMan();
    ~MemMan();
    void alloc(MemHandle *bsMem, uint32 pSize, uint16 pCond = MEM_DONT_FREE);
    void setCondition(MemHandle *bsMem, uint16 pCond);
    void freeNow(MemHandle *bsMem);
    void initHandle(MemHandle *bsMem);
    void flush();
private:
    void addToFreeList(MemHandle *bsMem);
    void removeFromFreeList(MemHandle *bsMem);
    void checkMemoryUsage();
    uint32 _alloced;  //currently allocated memory
    MemHandle *_memListFree;
    MemHandle *_memListFreeEnd;
};

} // End of namespace Sword1

#endif //MEMMAN_H