virtual memory alloctordlg.cpp

window核心编程_code源程序

// Virtual memory alloctorDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Virtual memory alloctor.h"
#include "Virtual memory alloctorDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CVirtualmemoryalloctorDlg dialog

CVirtualmemoryalloctorDlg::CVirtualmemoryalloctorDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CVirtualmemoryalloctorDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CVirtualmemoryalloctorDlg)
	m_Index = 0;
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CVirtualmemoryalloctorDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CVirtualmemoryalloctorDlg)
	DDX_Text(pDX, IDC_INDEX, m_Index);
	DDV_MinMaxInt(pDX, m_Index, 0, 49);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CVirtualmemoryalloctorDlg, CDialog)
	//{{AFX_MSG_MAP(CVirtualmemoryalloctorDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_RESERVE, OnReserve)
	ON_BN_CLICKED(IDC_USE, OnUse)
	ON_BN_CLICKED(IDC_CLEAR, OnClear)
	ON_BN_CLICKED(IDC_COLLECT, OnCollect)
	ON_EN_CHANGE(IDC_INDEX, OnChangeIndex)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CVirtualmemoryalloctorDlg message handlers

BOOL CVirtualmemoryalloctorDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	
	
	SYSTEM_INFO si;
	::GetSystemInfo(&si);
	m_pageSize=si.dwPageSize;
	m_pSomeData=NULL;
	CString str;
	str.Format("%dKB",si.dwPageSize/1024);
	SetDlgItemText(IDC_PAGESIZE,str);
	GetDlgItem(IDC_USE)->EnableWindow(FALSE);
	GetDlgItem(IDC_CLEAR)->EnableWindow(FALSE);
	GetDlgItem(IDC_COLLECT)->EnableWindow(FALSE);
	GetDlgItem(IDC_INDEX)->EnableWindow(FALSE);
    GetDlgItem(IDC_Map)->GetWindowRect(&m_rect);
	GetDlgItem(IDC_Map)->ShowWindow(SW_HIDE);
   MapWindowPoints(this,(LPPOINT)&m_rect,2);
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CVirtualmemoryalloctorDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CVirtualmemoryalloctorDlg::OnPaint() 
{

	 PAINTSTRUCT ps;
	BeginPaint(&ps);
	UINT MaxPageNum=MAX_SOMEDATA*sizeof(SOMEDATA)/m_pageSize;
	UINT PageWidth;
	PageWidth=(m_rect.right-m_rect.left)/MaxPageNum;
	if(m_pSomeData==NULL)
	{
	  Rectangle(ps.hdc,m_rect.left,m_rect.top,m_rect.left+MaxPageNum*PageWidth,m_rect.bottom);
	}
	else
	{
	 for(UINT i=0;i<MaxPageNum;i++)
	{
		UINT nIndex=i*m_pageSize/sizeof(SOMEDATA);
		UINT nIndexLast=nIndex+m_pageSize/sizeof(SOMEDATA);
		for(;nIndex<nIndexLast;nIndex++)
		{     MEMORY_BASIC_INFORMATION mbi;
			::VirtualQuery(&m_pSomeData[nIndex],&mbi,sizeof(mbi));
				int brush=0;
			switch(mbi.State)
			{
			case MEM_FREE:     brush=WHITE_BRUSH; break;
            case MEM_RESERVE:  brush=GRAY_BRUSH; break;
			case MEM_COMMIT:  brush=BLACK_BRUSH; break;
			}
		  SelectObject(ps.hdc,GetStockObject(brush));
		  Rectangle(ps.hdc,i*PageWidth+m_rect.left,m_rect.top,(i+1)*PageWidth+m_rect.left,m_rect.bottom);
		 
		}
		}
	}
	EndPaint(&ps);
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}


  
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CVirtualmemoryalloctorDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CVirtualmemoryalloctorDlg::OnReserve() 
{
	
   	m_pSomeData=(PSOMEDATA)VirtualAlloc(NULL,MAX_SOMEDATA*sizeof(SOMEDATA),MEM_RESERVE,PAGE_READWRITE);
    	GetDlgItem(IDC_USE)->EnableWindow(TRUE);
	GetDlgItem(IDC_COLLECT)->EnableWindow(TRUE);
	GetDlgItem(IDC_INDEX)->EnableWindow(TRUE);
    InvalidateRect(m_rect,FALSE);
}

void CVirtualmemoryalloctorDlg::OnUse() 
{
	::VirtualAlloc(&m_pSomeData[m_Index],sizeof(SOMEDATA),MEM_COMMIT,PAGE_READWRITE);
	m_pSomeData[m_Index].ifInUse=TRUE;
    GetDlgItem(IDC_USE)->EnableWindow(FALSE);
	GetDlgItem(IDC_CLEAR)->EnableWindow(TRUE);
	InvalidateRect(&m_rect,FALSE);
	
}

void CVirtualmemoryalloctorDlg::OnClear() 
{
  UpdateData();
  m_pSomeData[m_Index].ifInUse=FALSE;
  GetDlgItem(IDC_USE)->EnableWindow(TRUE);
  GetDlgItem(IDC_CLEAR)->EnableWindow(FALSE);
	
}

void CVirtualmemoryalloctorDlg::OnCollect() 
{
	UINT MaxPageNum=MAX_SOMEDATA*sizeof(SOMEDATA)/m_pageSize;
	BOOL free=FALSE;
	 for(UINT i=0;i<MaxPageNum;i++)
	{
		UINT nIndex=i*m_pageSize/sizeof(SOMEDATA);
		UINT nIndexLast=nIndex+m_pageSize/sizeof(SOMEDATA);
		for(;nIndex<nIndexLast;nIndex++)
		{     MEMORY_BASIC_INFORMATION mbi;
			::VirtualQuery(&m_pSomeData[nIndex],&mbi,sizeof(mbi));
			if(mbi.State==MEM_COMMIT)
			{  
			   free=(m_pSomeData[nIndex].ifInUse==TRUE);       
			}	
		}

         if(free)
		 {
			 break;
		 }
		 else
		 {
			 ::VirtualFree(&m_pSomeData[nIndexLast-1],sizeof(SOMEDATA),MEM_DECOMMIT);
		 }
		}
        InvalidateRect(&m_rect,FALSE);
	}	


void CVirtualmemoryalloctorDlg::OnChangeIndex() 
{
	// TODO: If this is a RICHEDIT control, the control will not
	// send this notification unless you override the CDialog::OnInitDialog()
	// function and call CRichEditCtrl().SetEventMask()
	// with the ENM_CHANGE flag ORed into the mask.
	
	// TODO: Add your control notification handler code here
    UpdateData();
	if(m_pSomeData!=NULL)
	{ 
         MEMORY_BASIC_INFORMATION mbi;
			::VirtualQuery(&m_pSomeData[m_Index],&mbi,sizeof(mbi));
		if(mbi.State==MEM_COMMIT)
		{
	    GetDlgItem(IDC_USE)->EnableWindow(m_pSomeData[m_Index].ifInUse);
	  GetDlgItem(IDC_CLEAR)->EnableWindow(TRUE);
		}
	else
	{
      GetDlgItem(IDC_USE)->EnableWindow(TRUE);
	  GetDlgItem(IDC_CLEAR)->EnableWindow(FALSE);
	}
}
}