CXTPChartSeriesPoint

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   Hi,
I am facing the following problem related to memory allocation and deallocation:

Xtreme ToolkitPro v15.3.1

I have allocated a number of CXTPChartSeriesPoint instances on the chart using CXTPChartFastLineSeriesStyle.
After processing, I have called the RemoveAll() function for the class CXTPChartSeriesCollection.
I am expecting that the memory allocated earlier will be deallocated and the free space in the user space (the amount of memory available to the process) will recover after calling RemoveAll() function, but it does not.
Eventually, the process runs out of memory.

Could anyone please help me with this issue?

Here my code:
void CFastLineView::AddPoint()
{
	CXTPChartContent* pContent = m_wndChartControl.GetContent();

	CXTPChartSeriesCollection* pCollection = pContent->GetSeries();

	int nCount;

	if (pCollection)
	{
		for (int s = 0; s < pCollection->GetCount(); s++)
		{
			CXTPChartSeries* pSeries = pCollection->GetAt(s);
			if (pSeries)
			{
				int nValue = 50;

				nCount = pSeries->GetPoints()->GetCount();

				if (nCount)
					nValue = (int)pSeries->GetPoints()->GetAt(nCount - 1)->GetValue(0);

				nValue = nValue + (rand() % 20) - 10;

				if (nValue < 0) nValue = 0;
				if (nValue > 100) nValue = 100;

				pSeries->GetPoints()->Add(new CXTPChartSeriesPoint(nCount, nValue));

			}
		}
	}

	CXTPChartDiagram2D* pDiagram = DYNAMIC_DOWNCAST(CXTPChartDiagram2D, 
		m_wndChartControl.GetContent()->GetPanels()->GetAt(0));
	ASSERT (pDiagram);

	if (nCount > 100)
	{
		CXTPChartAxisRange* pRange = pDiagram->GetAxisX()->GetRange();

		BOOL bAutoScroll = pRange->GetViewMaxValue() == pRange->GetMaxValue();

		pRange->SetMaxValue(nCount);

		if (bAutoScroll)
		{
			double delta = pRange->GetViewMaxValue() - pRange->GetViewMinValue();

			pRange->SetViewAutoRange(FALSE);
			pRange->SetViewMaxValue(nCount);
			pRange->SetViewMinValue(nCount - delta);
		}
	}
}

// 1msec Interval
void CFastLineView::OnTimer(UINT_PTR nIDEvent)
{
	for (int i = 0; i < 1000; i++){
		AddPoint();
	}
}

// Collection, point initialization
void CFastLineView::CollectionRemoveAll()
{
	CXTPChartContent* pContent = m_wndChartControl.GetContent();

	CXTPChartSeriesCollection* pCollection = pContent->GetSeries();
	pCollection->RemoveAll();
}

// Event when button is pressed
void CFastLineView::OnButton()
{
	CString str;
	MEMORYSTATUSEX memstat;
	memstat.dwLength = sizeof(memstat);

	if (GlobalMemoryStatusEx(&memstat))
	{
		str.Format("%dMB", memstat.ullAvailVirtual/(1024*1024));
		AfxMessageBox(str);											// Example output: 1000MB
	}	

	CollectionRemoveAll();

	if (GlobalMemoryStatusEx(&memstat))
	{
		str.Format("%dMB", memstat.ullAvailVirtual/(1024*1024));
		AfxMessageBox(str);											// Example output: 1000MB (memory not recovered)
	}	
}

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kunishima Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 17 November 2019 Status: Offline Points: 3	Post Options Post Reply Quote kunishima Report Post Thanks(0) Quote Reply Topic: CXTPChartSeriesPoint Posted: 17 November 2019 at 9:06pm
	Hi, I am facing the following problem related to memory allocation and deallocation: Xtreme ToolkitPro v15.3.1 I have allocated a number of CXTPChartSeriesPoint instances on the chart using CXTPChartFastLineSeriesStyle. After processing, I have called the RemoveAll() function for the class CXTPChartSeriesCollection. I am expecting that the memory allocated earlier will be deallocated and the free space in the user space (the amount of memory available to the process) will recover after calling RemoveAll() function, but it does not. Eventually, the process runs out of memory. Could anyone please help me with this issue? Here my code: void CFastLineView::AddPoint() { CXTPChartContent* pContent = m_wndChartControl.GetContent(); CXTPChartSeriesCollection* pCollection = pContent->GetSeries(); int nCount; if (pCollection) { for (int s = 0; s < pCollection->GetCount(); s++) { CXTPChartSeries* pSeries = pCollection->GetAt(s); if (pSeries) { int nValue = 50; nCount = pSeries->GetPoints()->GetCount(); if (nCount) nValue = (int)pSeries->GetPoints()->GetAt(nCount - 1)->GetValue(0); nValue = nValue + (rand() % 20) - 10; if (nValue < 0) nValue = 0; if (nValue > 100) nValue = 100; pSeries->GetPoints()->Add(new CXTPChartSeriesPoint(nCount, nValue)); } } } CXTPChartDiagram2D* pDiagram = DYNAMIC_DOWNCAST(CXTPChartDiagram2D, m_wndChartControl.GetContent()->GetPanels()->GetAt(0)); ASSERT (pDiagram); if (nCount > 100) { CXTPChartAxisRange* pRange = pDiagram->GetAxisX()->GetRange(); BOOL bAutoScroll = pRange->GetViewMaxValue() == pRange->GetMaxValue(); pRange->SetMaxValue(nCount); if (bAutoScroll) { double delta = pRange->GetViewMaxValue() - pRange->GetViewMinValue(); pRange->SetViewAutoRange(FALSE); pRange->SetViewMaxValue(nCount); pRange->SetViewMinValue(nCount - delta); } } } // 1msec Interval void CFastLineView::OnTimer(UINT_PTR nIDEvent) { for (int i = 0; i < 1000; i++){ AddPoint(); } } // Collection, point initialization void CFastLineView::CollectionRemoveAll() { CXTPChartContent* pContent = m_wndChartControl.GetContent(); CXTPChartSeriesCollection* pCollection = pContent->GetSeries(); pCollection->RemoveAll(); } // Event when button is pressed void CFastLineView::OnButton() { CString str; MEMORYSTATUSEX memstat; memstat.dwLength = sizeof(memstat); if (GlobalMemoryStatusEx(&memstat)) { str.Format("%dMB", memstat.ullAvailVirtual/(10241024)); AfxMessageBox(str); // Example output: 1000MB } CollectionRemoveAll(); if (GlobalMemoryStatusEx(&memstat)) { str.Format("%dMB", memstat.ullAvailVirtual/(10241024)); AfxMessageBox(str); // Example output: 1000MB (memory not recovered) } }

agontarenko Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 25 March 2016 Status: Offline Points: 294	Post Options Post Reply Quote agontarenko Report Post Thanks(2) Quote Reply Posted: 25 November 2019 at 4:01am
	Hello, I've checked 15.3.1 and 19.1 versions and any problem has not found. If I to call GlobalMemoryStatusEx function in OnInitialUpdate up to initialization, I've got about the same result what after CollectionRemoveAll function call. Thus I think CollectionRemoveAll function call has no effect on MEMORYSTATUSEX::ullAvailVirtual. Regards, Artem Gontarenko