#ifdef CMD_ANSYNC
class CRingBuffer
{
public:
    CRingBuffer();
    int Init(int nObj, int nObjSize);
    int Fini();

    int Input(void * pObj);
    int Output(void * pObj);

private:
    int m_nObj;
    int m_nObjSize;
    int m_nInput;
    int m_nOutput;
    void * m_pObj;

    CRITICAL_SECTION m_stCS;
    int OPObj(int nAction, void * pObj);
};
#endif