trymutex.cpp

Visual C++高级编程及其项目应用开发(含源代码)

// TryMutex.cpp : Defines the class behaviors for the application.
//

#include "stdafx.h"
#include "TryMutex.h"
#include "TryMutexDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CTryMutexApp

BEGIN_MESSAGE_MAP(CTryMutexApp, CWinApp)
	//{{AFX_MSG_MAP(CTryMutexApp)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG
	ON_COMMAND(ID_HELP, CWinApp::OnHelp)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTryMutexApp construction

CTryMutexApp::CTryMutexApp()
{
	// TODO: add construction code here,
	// Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CTryMutexApp object

CTryMutexApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CTryMutexApp initialization

BOOL CTryMutexApp::InitInstance()
{
	CString strClassName = "TryMyMutex";
	CMutex m_Mutex(FALSE, strClassName);
	if(!m_Mutex.Lock(1))
	{
		::AfxMessageBox("已经有一个实例在运行了！");
		return FALSE;
	}
	/*
	m_hMutex = ::OpenMutex(MUTEX_ALL_ACCESS, FALSE, strClassName);
	if(m_hMutex == NULL)
	{
		m_hMutex = ::CreateMutex(NULL, TRUE, strClassName);
	}
	else
	{
		::AfxMessageBox("已经有一个实例在运行了！");
		return FALSE;
	}*/
	AfxEnableControlContainer();

	// Standard initialization
	// If you are not using these features and wish to reduce the size
	//  of your final executable, you should remove from the following
	//  the specific initialization routines you do not need.

#ifdef _AFXDLL
	Enable3dControls();			// Call this when using MFC in a shared DLL
#else
	Enable3dControlsStatic();	// Call this when linking to MFC statically
#endif

	CTryMutexDlg dlg;
	m_pMainWnd = &dlg;
	int nResponse = dlg.DoModal();
	if (nResponse == IDOK)
	{
		// TODO: Place code here to handle when the dialog is
		//  dismissed with OK
	}
	else if (nResponse == IDCANCEL)
	{
		// TODO: Place code here to handle when the dialog is
		//  dismissed with Cancel
	}

	// Since the dialog has been closed, return FALSE so that we exit the
	//  application, rather than start the application's message pump.
	return FALSE;
}

int CTryMutexApp::ExitInstance() 
{
	// TODO: Add your specialized code here and/or call the base class
	/*if(m_hMutex != NULL)
	{
		::ReleaseMutex(m_hMutex);
	}*/
	return CWinApp::ExitInstance();
}