#define SHAREMEMORY_CIRCLE_API
#define SHAREMEMORY_CIRCLE_C_API extern "C" 

#include <string>
//#include"DiosThread.h"
#include "ShareMemory_Client.h"


using namespace std;

#define SMCWaitTimeout 2000
#define ShareMemoryNameLen 16


//typedef struct _ShareMemoryCircleBlock
//{
//	SHRAREMEMBLOCKID g_ID;
//	size_t BlockSize;
//}SMCBLOCK;

class SHAREMEMORY_CIRCLE_API CShareMemory_Circle{
	SMClientID m_SMinfo;
	char m_SMname[ShareMemoryNameLen];
	unsigned char m_ShareMemoryId;
	unsigned long m_BlockSize;
	int m_nMaxLimit;
	void* m_pLog;
	//void CreateLogger();

	unsigned char m_ResetCount;

	unsigned int * m_pBlockSize;
	unsigned int * m_pMainCount;
	unsigned int * m_pMainFirstIdx;
	unsigned int * m_pMainLastIdx;
	unsigned int * m_pMainCurrentIdx;
	bool * m_pMainListEmpty;
	char * m_pClearUseTmpBuff;

	bool SetSMCctrl(int First, int Last, int Current);
	bool GetSMCctrl();
	bool UpdateSMCctrlCrrent(bool IncOrDec);
	bool UpdateSMCctrlPush(bool ForceFlag);
	bool UpdateSMCctrlPop(bool ForceFlag);
	bool SMCBidIsValid(ShareMemoryBlockID &SMCBid);
	bool APILock();
	bool APIUnLock();
	bool BlockLock(unsigned long position);
	bool BlockUnLock(unsigned long position);
	bool ClearFullBlock();
	bool CircleIsFull();

public:
	CShareMemory_Circle();
	~CShareMemory_Circle();

	//static BYTE m_type;
	int Create(const char * path, unsigned long DataSize, unsigned long DataCount, int Authority);
	bool Destroy();
	int Open(const char * path, int Authority);
	int Open(ShareMemoryBlockID &SMCBid, int Authority);
	bool Close();
	ShareMemoryBlockID Push(void* buff, unsigned long size, bool ForceFlag);//Write
	ShareMemoryBlockID Push(ShareMemoryBlockID SMBid, bool ForceFlag);//Write
	ShareMemoryBlockID PushRaw(string imageHead, void* RawData, unsigned long size, bool ForceFlag);//Write Raw and imageHead
	bool Pop(void* & buff, unsigned long& size);//Read
	ShareMemoryBlockID Pop();//Read
	bool PopLast(void* & buff, unsigned long& size);//Read
	ShareMemoryBlockID PopLast();//Read
	bool GetCurrent(void* & buff, unsigned long& size);
	ShareMemoryBlockID GetCurrent();
	bool GetCurrent(void* & buff, unsigned long& size, bool IncOrDec);
	ShareMemoryBlockID GetCurrent(bool IncOrDec);
	bool SetCurrent(int CurrentFlag, ShareMemoryBlockID & CurrentSMBid);
	unsigned long ResetCircle(unsigned long newBlockSize);
	bool Clear();
	bool Seek(UINT64 position);
	unsigned long GetSize();

	unsigned long GetDataCount();//有效数据个数
	unsigned long GetLeftCount();//未读有效数据个数
	unsigned long GetLimitCount();//能保存的最大数据个数

	bool Read(ShareMemoryBlockID &SMCBid, void* buff, unsigned long size);
	bool Write(ShareMemoryBlockID &SMCBid, void* buff, unsigned long size);
	bool Lock();
	bool UnLock();


	static bool SM_Circle_BlockIDVerify(ShareMemoryBlockID &SMCBid);
	bool GetBlockDataAddr(ShareMemoryBlockID &SMCBid, void* & buff, unsigned long& size);//获取到的buff是去除SMCELEMENTHEAD的整块block的首地址，size为去除SMCELEMENTHEAD的整块block大小

};