#ifndef _TBIGMEMORYMANAGER_
#define _TBIGMEMORYMANAGER_

class Chunkinfo;

#undef DVAPI
#undef DVVAR
#ifdef TSYSTEM_EXPORTS
#define DVAPI DV_EXPORT_API
#define DVVAR DV_EXPORT_VAR
#else
#define DVAPI DV_IMPORT_API
#define DVVAR DV_IMPORT_VAR
#endif

#include "tcommon.h"
#include "tthreadmessage.h"
class TRaster;

class DVAPI TBigMemoryManager
{
	TThread::Mutex m_mutex;
	UCHAR *m_theMemory;
	std::map<UCHAR *, Chunkinfo> m_chunks;
	UCHAR *allocate(UINT &size);

	TUINT32 m_availableMemory, m_allocatedMemory;
	std::map<UCHAR *, Chunkinfo>::iterator shiftBlock(const std::map<UCHAR *, Chunkinfo>::iterator &it, TUINT32 offset);
	TRaster *findRaster(TRaster *ras);
	void checkConsistency();
	UCHAR *remap(TUINT32 RequestedSize);
	void printLog(TUINT32 size);

public:
	TBigMemoryManager();
	~TBigMemoryManager();
	bool init(TUINT32 sizeinKb);
	bool putRaster(TRaster *ras, bool canPutOnDisk = true);
	bool releaseRaster(TRaster *ras);
	void lock(UCHAR *buffer);
	void unlock(UCHAR *buffer);
	UCHAR *getBuffer(UINT size);
	static TBigMemoryManager *instance();
	bool isActive() const { return m_theMemory != 0; }
	//void releaseSubraster(UCHAR *chunk, TRaster*subRas);
	TUINT32 getAvailableMemoryinKb() const
	{
		assert(m_theMemory != 0);
		return m_availableMemory >> 10;
	}
	void getRasterInfo(int &rasterCount, TUINT32 &totRasterMemInKb, int &notCachedRasterCount, TUINT32 &notCachedRasterMemInKb);
#ifdef _DEBUG
	TUINT32 m_totRasterMemInKb;
	void printMap();
#endif
	int getAllocationPeak();
	int getAllocationMean();

	void setRunOutOfContiguousMemoryHandler(void (*callback)(unsigned long size));

private:
	friend class TRaster;
	void (*m_runOutCallback)(unsigned long);
};

#endif