sam_sp_43dlg.cpp

专题讲座四：内容包括为什么需要多进程或线程 、进程控制、线程控制、进程或线程间同步、进程间通信等。附例程。

// sam_sp_43Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "sam_sp_43.h"
#include "sam_sp_43Dlg.h"

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


UINT WorkerThread( LPVOID pParam )
{
	//接收一个窗口类指针，然后设置窗口标题
	CWnd *pstaTimer=(CWnd*)pParam;
	for(int i=0;i<100;i++)
	{
		//TRACE("thread %d\n",i);
		char szT[100];
		sprintf(szT,"worker thread : %d",i);
		pstaTimer->SetWindowText(szT);
		Sleep(10);
	}
	return 0;   // 返回并退出线程
	//或者调用void AfxEndThread( UINT nExitCode );来退出
}

class CGUIThread:public CWinThread
{
public:
	CGUIThread();
	virtual BOOL InitInstance(void);
	virtual int ExitInstance(void);
};
CGUIThread::CGUIThread()
{
	//设置自动删除
	m_bAutoDelete = TRUE;
}
BOOL CGUIThread::InitInstance(void)
{
	CWnd* pWnd=new CWnd();
	pWnd->CreateEx(0,
			AfxRegisterWndClass( CS_HREDRAW|CS_VREDRAW) ,
			"gui thread window",
			WS_OVERLAPPEDWINDOW|WS_VISIBLE,
			CRect(0,0,100,100),
			NULL,
			0);
	m_pMainWnd=pWnd;
	return (m_pMainWnd!=FALSE);
}
int CGUIThread::ExitInstance(void)
{
	TRACE("gui thread exit\n");

	return CWinThread::ExitInstance();
}

/////////////////////////////////////////////////////////////////////////////
// CSam_sp_43Dlg dialog

CSam_sp_43Dlg::CSam_sp_43Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CSam_sp_43Dlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CSam_sp_43Dlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CSam_sp_43Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CSam_sp_43Dlg)
	DDX_Control(pDX, IDC_TIMER, m_staTimer);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CSam_sp_43Dlg, CDialog)
	//{{AFX_MSG_MAP(CSam_sp_43Dlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_GUI_T, OnGuiT)
	ON_BN_CLICKED(IDC_WORK_T, OnWorkT)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSam_sp_43Dlg message handlers

BOOL CSam_sp_43Dlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// 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
}

// 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 CSam_sp_43Dlg::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 CSam_sp_43Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CSam_sp_43Dlg::OnGuiT() 
{
	CGUIThread *p_thread1=new CGUIThread;
	p_thread1->CreateThread();
	//使用默认参数，由于CGUIThread自动删除，所以不需要保存该指针
}

void CSam_sp_43Dlg::OnWorkT() 
{
	AfxBeginThread(WorkerThread,&m_staTimer);
}