memory-manager.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 ELF_MEMORY_MANAGER_H
#define ELF_MEMORY_MANAGER_H

#include "common/scummsys.h"

#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER)

#include "common/singleton.h"
#include "common/list.h"
#include "common/mutex.h"

#define ELFMemMan       ELFMemoryManager::instance()

class ELFMemoryManager : public Common::Singleton<ELFMemoryManager> {
public:
    void trackPlugin(bool value);
    void trackAlloc(uint32 align, uint32 size);

    void allocateHeap();

    void *pluginAllocate(uint32 size);
    void *pluginAllocate(uint32 align, uint32 size);
    void pluginDeallocate(void *ptr);

private:
   friend class Common::Singleton<ELFMemoryManager>;

    ELFMemoryManager();
    ~ELFMemoryManager();

    void *allocateOnHeap(uint32 align, uint32 size);
    void deallocateFromHeap(void *ptr);

    struct Allocation {
        byte *start;
        uint32 size;
        byte *end() { return start + size; }
        Allocation(byte *a, uint32 b) : start(a), size(b) {}
    };

    // heap
    void *_heap;
    uint32 _heapAlign;          // alignment of the heap
    uint32 _heapSize;           // size of the heap

    // tracking allocations
    bool _trackAllocs;      // whether we are currently tracking
    uint32 _measuredSize;
    uint32 _measuredAlign;

    // real allocations
    Common::List<Allocation> _allocList;
    uint32 _bytesAllocated;
};

#endif /* defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) */

#endif /* ELF_MEMORY_MANAGER_H */