| //+------------------------------------------------------------------+
|
| //| 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
|
| {
|
| return(m_handle==INVALID_HANDLE);
|
| }
|
| };
|
| //+------------------------------------------------------------------+
|
| //| CDXHandleShared constructor |
|
| //+------------------------------------------------------------------+
|
| CDXHandleShared::CDXHandleShared(void) : m_references(1)
|
| {
|
| }
|
| //+------------------------------------------------------------------+
|
| //| CDXHandleShared destructor |
|
| //+------------------------------------------------------------------+
|
| CDXHandleShared::~CDXHandleShared(void)
|
| {
|
| //--- check reference count for the debuging reason
|
| #ifdef _DEBUG
|
| if(m_references)
|
| {
|
| Alert("CDXHandleShared object was deleted with non-zero references count!");
|
| DebugBreak();
|
| }
|
| #endif
|
| }
|
| //+------------------------------------------------------------------+
|
| //| Add reference to the shared object |
|
| //+------------------------------------------------------------------+
|
| ulong CDXHandleShared::AddRef(void)
|
| {
|
| //--- return new reference count for the debugging reason
|
| return(++m_references);
|
| }
|
| //+------------------------------------------------------------------+
|
| //| Get references count to the shared object |
|
| //+------------------------------------------------------------------+
|
| ulong CDXHandleShared::References(void)
|
| {
|
| //--- return new reference count for the debugging reason
|
| return(m_references);
|
| }
|
| //+------------------------------------------------------------------+
|
| //| Remove reference from the shared object |
|
| //+------------------------------------------------------------------+
|
| ulong CDXHandleShared::Release(void)
|
| {
|
| if(!m_references)
|
| return(0);
|
| //---
|
| m_references--;
|
| //--- delete shared object if there no any references
|
| if(!m_references)
|
| {
|
| delete &this;
|
| return(0);
|
| }
|
| //--- return new reference count for the debugging reason
|
| return(m_references);
|
| }
|
| //+------------------------------------------------------------------+
|
