childprocessdlg.cpp

操作系统实验,进程控制实验,Process.exe为父进程执行程序ChildProcess.exe为子进程执行的程序 该程序实现了进程间的消息通信

// ChildProcessDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ChildProcess.h"
#include "ChildProcessDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CChildProcessDlg dialog

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

void CChildProcessDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CChildProcessDlg)
	DDX_Text(pDX, IDC_EDIT1, m_strInfo);
	//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CChildProcessDlg, CDialog)
	//{{AFX_MSG_MAP(CChildProcessDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_COPYDATA()
	ON_BN_CLICKED(IDC_BUTTON1, OnCreateAndReadData)
	ON_BN_CLICKED(IDC_BUTTON2, OnReadFileMapping)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CChildProcessDlg message handlers

/////////////////////////////////////////
BOOL CChildProcessDlg::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
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CChildProcessDlg::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 CChildProcessDlg::OnPaint() 
{
	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 CChildProcessDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
////////////////////////////////////////////
int CDECL CChildProcessDlg::MessageBoxPrintf(TCHAR* szCaption,TCHAR*szFormat,...)
{
	TCHAR szBuffer[1024];
	va_list pArgList;
	va_start(pArgList,szFormat);
	_vsntprintf(szBuffer,sizeof(szBuffer)/sizeof(TCHAR),
		szFormat,pArgList);
	va_end(pArgList);
	return MessageBox(szBuffer,szCaption,0);
	///////////////////////////////
}

BOOL CChildProcessDlg::OnCopyData(CWnd* pWnd, COPYDATASTRUCT* pCopyDataStruct) 
{
	// TODO: Add your message handler code here and/or call default
	m_strInfo=(char*)pCopyDataStruct->lpData;
	UpdateData(FALSE);
	return CDialog::OnCopyData(pWnd, pCopyDataStruct);
}

void CChildProcessDlg::OnCreateAndReadData() 
{
	// TODO: Add your control notification handler code here
	m_strInfo="";
	UpdateData(FALSE);
	unsigned long lBytesRead,lTotalBytes;
	char buff[1024];
	HANDLE PipeHandle;
	Sleep(500);

	if ((PipeHandle = CreateNamedPipe("\\\\.\\PIPE\\child",
		PIPE_ACCESS_DUPLEX, PIPE_TYPE_BYTE | PIPE_READMODE_BYTE,
		10, 1024, 1024, 2000, NULL)) == INVALID_HANDLE_VALUE)
	{
		MessageBoxPrintf("错误报告","CreateNamedPipe failed with error %d\n",
			GetLastError());
	}
 //while(1) 
	//{
		if (ConnectNamedPipe(PipeHandle, NULL) == 0)
		{
			MessageBoxPrintf("错误报告","ConnectNamedPipe failed with error %d\n",
				GetLastError());
			//break;
		}

		// Read data from and echo data to the client until
		// the client is ready to stop
		while(true)
		{
			 ZeroMemory(buff, sizeof(buff));
			 PeekNamedPipe(PipeHandle,buff,1024,&lBytesRead,&lTotalBytes,0);
			 if(lBytesRead)
			 {
				  if(ReadFile(PipeHandle,buff,lBytesRead,&lBytesRead,0)>0)
					m_strInfo=buff;
				  UpdateData(FALSE);
			 }
			 else
			 {
				if (DisconnectNamedPipe(PipeHandle) == 0)
				{
					MessageBoxPrintf("错误报告","DisconnectNamedPipe failed with error %d\n",
						GetLastError());
					
				}
				break;
			 }
		}
		
	///}

	CloseHandle(PipeHandle);
}

void CChildProcessDlg::OnReadFileMapping() 
{
	// TODO: Add your control notification handler code here
	HANDLE hMapping =OpenFileMapping(
		FILE_MAP_ALL_ACCESS,  // access mode
		FALSE,    // inherit flag
		"MYSHARE"      // pointer to name of file-mapping object
		);
	LPSTR lpData=(LPSTR)MapViewOfFile(hMapping,FILE_MAP_ALL_ACCESS,0,0,0);
	if(lpData==NULL)   
	{   
		AfxMessageBox("MapViewOfFile() failed.");
		return;
	}
	m_strInfo=lpData;
	if(!m_strInfo.IsEmpty())
	{
		UpdateData(FALSE);
		UnmapViewOfFile(lpData);  
	}
	else
	{
		MessageBox("读取出错");
	}
 
}