mql5/Include/Canvas/DX/DXHandle.mqh

<EFBFBD><EFBFBD>//+------------------------------------------------------------------+

//|                                                     DXHandle.mqh |

//|                             Copyright 2000-2025, MetaQuotes Ltd. |

//|                                             https://www.mql5.com |

//+------------------------------------------------------------------+

#include "DXObjectBase.mqh"



//+------------------------------------------------------------------+

//| Class CDXHandle                                                  |

//+------------------------------------------------------------------+

class CDXHandle : public CDXObjectBase

  {

protected:

   int               m_handle;         // DX handle



protected:

                     CDXHandle(void);

   virtual          ~CDXHandle(void);



public:

   int               Handle(void) const { return(m_handle); }

  };

//+------------------------------------------------------------------+

//| CDXHandle constructor                                            |

//+------------------------------------------------------------------+

CDXHandle::CDXHandle(void) : m_handle(-1)

  {

  }

//+------------------------------------------------------------------+

//| CDXHandle destructor                                             |

//+------------------------------------------------------------------+

CDXHandle::~CDXHandle(void)

  {

   if(m_handle!=-1)

     {

      DXRelease(m_handle);

      m_handle=-1;

     }

  }

//+------------------------------------------------------------------+

//| Class CDXHandleShared                                            |

//+------------------------------------------------------------------+

class CDXHandleShared : public CDXHandle

  {

protected:

   ulong             m_references;     // reference count to the shared object



protected:

   virtual          ~CDXHandleShared(void);



public:

                     CDXHandleShared(void);



   virtual ulong     AddRef(void);

   virtual ulong     References(void);

   virtual ulong     Release(void);



   bool              operator!(void) const

     {