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/* 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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#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"
/**
* A 'foolproof' way to prevent memory fragmentation. This class is used to
* serve as a permanent allocation to prevent the process of loading and
* unloading plugins from causing heavy fragmentation.
**/
#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 */
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