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Multi platform plug-in development made easy!

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7 Mar 20065 min read 100.5K   1.9K   63  
How to use and develop plug-ins for multiple platforms.
// MfcThreadPluginTestDlg.cpp : Implementierungsdatei
//

#include "stdafx.h"
#include "MfcThreadPluginTest.h"
#include "MfcThreadPluginTestDlg.h"

#include "spl.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

#define WM_THREAD_MESSAGE	(WM_USER+1)
#define WM_THREAD_ENDS		(WM_USER+2)

// CMfcThreadPluginTestDlg Dialogfeld

slcPluginServer pluginServer;
slcPluginInfo   pluginInfo;

volatile bool bThreadRun = false;
char szBuf[ MAX_PATH ] = { 0 };

int iThread = 0;

static UINT Thread( LPVOID pParam )
{
	CMfcThreadPluginTestDlg* pDlg  = reinterpret_cast<CMfcThreadPluginTestDlg*>( pParam );

	int iID = iThread;
	long lRunPlugin = -1;
	CString strTemp;


	slcPluginArgs	pluginArgs;

	if( strlen( (char*) pDlg->m_strInput.operator LPCTSTR() ) == 0 )
	{
		pDlg->SendMessage( WM_THREAD_ENDS, (WPARAM) iID, (LPARAM) 0 );
		iThread--;
		return -1;
	}

	while( bThreadRun )
	{
		while( pluginServer.TryLock() != 0 )
		{
			TRACE("EBUSY on thread %d\n", iID );
			MSG msg;
			while( ::PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) )
			{
				::TranslateMessage( &msg );
				::DispatchMessage( &msg );
			}
			Sleep( 10 );
		}
		strTemp = (char*) szBuf; 

		lRunPlugin = 0;

		pluginArgs.SetArg( (void*) strTemp.operator LPCTSTR() );
		pluginArgs.SetArg( (void*) szBuf );

		if( pluginServer.RunPlugin( lRunPlugin, &pluginArgs ) == 1 )
		{
			TRACE("thread %d: %s\n", iID, (char*) szBuf );
			strTemp = szBuf;
			pDlg->PostMessage( WM_THREAD_MESSAGE, (WPARAM) MAKELONG( lRunPlugin, iID), 
				(LPARAM) strTemp.operator  LPCTSTR( ) ); 
		}
		else 
			break;

		pluginServer.Unlock();
		pluginArgs.Clear();

		Sleep( rand() % 100 );
	}
	iThread--;
	pDlg->SendMessage( WM_THREAD_ENDS, (WPARAM) iID, (LPARAM) 0 );
	return 0;
}

CMfcThreadPluginTestDlg::CMfcThreadPluginTestDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMfcThreadPluginTestDlg::IDD, pParent)
	, m_strPlugin(_T(""))
	, m_strInput(_T(""))
	, m_iRunningThreads(0)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMfcThreadPluginTestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Control(pDX, IDC_LIST_OUTPUT, m_ctrlListOutput);
	DDX_Text(pDX, IDC_INPUT, m_strInput );
	DDX_Text(pDX, IDC_PLUGIN, m_strPlugin );
	DDX_Text(pDX, IDC_THREAD_COUNT, m_iRunningThreads );
}

BEGIN_MESSAGE_MAP(CMfcThreadPluginTestDlg, CDialog)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
	ON_BN_CLICKED(IDC_START, OnBnClickedStart)
	ON_BN_CLICKED(IDCANCEL, OnBnClickedCancel)
	ON_MESSAGE(WM_THREAD_MESSAGE, OnThreadMessage)
	ON_MESSAGE(WM_THREAD_ENDS, OnThreadEnds)
	ON_BN_CLICKED(IDC_STOP, OnBnClickedStop)
	ON_BN_CLICKED(IDC_CLEAR, OnBnClickedClear)
END_MESSAGE_MAP()


// CMfcThreadPluginTestDlg Meldungshandler

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

	// Symbol f�r dieses Dialogfeld festlegen. Wird automatisch erledigt
	//  wenn das Hauptfenster der Anwendung kein Dialogfeld ist
	SetIcon(m_hIcon, TRUE);			// Gro�es Symbol verwenden
	SetIcon(m_hIcon, FALSE);		// Kleines Symbol verwenden

	pluginServer.LoadPlugin( "..\\plugins\\PLReverseSlow.dll" );
	pluginInfo = pluginServer.GetPluginInfo( pluginServer.GetLoadedPlugins() - 1 );
	m_strPlugin = pluginInfo.GetName().c_str();

	UpdateData( FALSE );
	
	return TRUE;  // Geben Sie TRUE zur�ck, au�er ein Steuerelement soll den Fokus erhalten
}

// Wenn Sie dem Dialogfeld eine Schaltfl�che "Minimieren" hinzuf�gen, ben�tigen Sie 
//  den nachstehenden Code, um das Symbol zu zeichnen. F�r MFC-Anwendungen, die das 
//  Dokument/Ansicht-Modell verwenden, wird dies automatisch ausgef�hrt.

void CMfcThreadPluginTestDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // Ger�tekontext zum Zeichnen

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// Symbol in Clientrechteck zentrieren
		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;

		// Symbol zeichnen
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

LRESULT CMfcThreadPluginTestDlg::OnThreadMessage( WPARAM wParam, LPARAM lParam )
{
	CString strTemp;

	pluginServer.Lock();
	slcPluginInfo pluginInfo = pluginServer.GetSafedPluginInfo( (long) LOWORD( wParam ) );

	strTemp.Format( "Thread %d runs plugin %s:\t%s", (int) HIWORD( wParam), 
		pluginInfo.GetName().c_str(), (char*) lParam );
	m_ctrlListOutput.AddString( strTemp );
	m_ctrlListOutput.SetCurSel( m_ctrlListOutput.GetCount() - 1);
	pluginServer.Unlock();
	return 0;
}

LRESULT CMfcThreadPluginTestDlg::OnThreadEnds( WPARAM wParam, LPARAM lParam )
{
	CString strTemp;
	strTemp.Format( "Thread %d ends!", (int) wParam);
	m_ctrlListOutput.AddString( strTemp );
	m_ctrlListOutput.SetCurSel( m_ctrlListOutput.GetCount() - 1);
	m_iRunningThreads--;
	UpdateData( FALSE );
	return 0;
}

// Die System ruft diese Funktion auf, um den Cursor abzufragen, der angezeigt wird, w�hrend der Benutzer
//  das minimierte Fenster mit der Maus zieht.
HCURSOR CMfcThreadPluginTestDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

void CMfcThreadPluginTestDlg::OnBnClickedStart()
{
	UpdateData();
	strncpy( (char*) szBuf, m_strInput, MAX_PATH );
	bThreadRun = true;
	
	if( iThread > 9 )
		return;

	iThread++;

	AfxBeginThread( Thread, this, THREAD_PRIORITY_LOWEST );
	m_iRunningThreads = iThread;
	UpdateData( FALSE );
	Sleep( 500 );
}

void CMfcThreadPluginTestDlg::OnBnClickedCancel()
{
	if( bThreadRun )
	{
		bThreadRun = false;
		while( m_iRunningThreads > 0)
		{
			MSG msg;
			Sleep( 10 );
			while( ::PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) )
			{
				::TranslateMessage( &msg );
				::DispatchMessage( &msg );
			}
		}
		Sleep( 1200 );
	}
	OnCancel();
}

void CMfcThreadPluginTestDlg::OnBnClickedStop()
{
	bThreadRun = false;
	while( m_iRunningThreads > 0)
	{
		MSG msg;
		Sleep( 10 );
		while( ::PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) )
		{
			::TranslateMessage( &msg );
			::DispatchMessage( &msg );
		}
	}
	m_ctrlListOutput.AddString( (char*) szBuf );
}


void CMfcThreadPluginTestDlg::OnBnClickedClear()
{
	m_ctrlListOutput.ResetContent();
}

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Written By
Web Developer
Germany Germany
I was born in 1982 near Stuttgart / Germany and began my first steps in programming computers at the age of only nine years on an old Commodore CBM 7072. In 2002 I finished my education as IT specialist for software engineering and did my civillian service afterwards. Currently I'm working as leader of the software division in a bigger company located in south west Germany, mainly on software development and research projects for multimedia terminals and user recognition/verification systems.

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