dcsimg

Launch and wait for application to end

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Desktop-as-a-Service Designed for Any Cloud ? Nutanix Frame


This is a dll that exports a function called Wait(). Wait() is similiar with WinExec(). The difference is that Wait()

run an application and return until the application ends.

This project consists of 3 functions:

Wait()

Create a thread and wait for an event. Use pThreadEvent to identify if the called application ends. WaitForSingleObject()

pauses the application and waits for the called application to end.

_declspec(dllexport) BOOL Wait(CString szCmdLine)
{
    LPTHREADINFO pThreadInfo = new THREADINFO;
    CEvent *pThreadEvent = new CEvent(FALSE, TRUE);
    ASSERT_VALID(pThreadEvent);
    if(pThreadInfo)
    {
        pThreadInfo->pTermThreadEvent = pThreadEvent;
        pThreadInfo->strPathName = szCmdLine;

        AfxBeginThread(LaunchAndWait, pThreadInfo);
        WaitForSingleObject(pThreadEvent->m_hObject, INFINITE);
        return TRUE;
    }
    return FALSE;
}

LaunchAndWait()

Call LaunchApplication() to run the application and wait for an event.WaitForMultiObjects() wait for either the called application to end or the main process to end.

UINT LaunchAndWait(LPVOID pParam)
{
    LPTHREADINFO pThreadInfo = (LPTHREADINFO) pParam;
    PROCESS_INFORMATION stProcessInfo;
    if(LaunchApplication(pThreadInfo->strPathName, &stProcessInfo))
    {
        HANDLE hThreads[2];
        hThreads[0] = pThreadInfo->pTermThreadEvent->m_hObject;
        hThreads[1] = stProcessInfo.hProcess;
        DWORD dwIndex = WaitForMultipleObjects(2, hThreads, FALSE, INFINITE);
        CloseHandle(stProcessInfo.hThread);
        CloseHandle(stProcessInfo.hProcess);
        pThreadInfo->pTermThreadEvent->SetEvent();
        if(pThreadInfo)
            delete pThreadInfo;
    }
    else
        pThreadInfo->pTermThreadEvent->SetEvent();
    return 0;
}

LaunchApplication()

Call CreateProcess to run the application.

BOOL LaunchApplication(LPCTSTR pCmdLine, PROCESS_INFORMATION *pProcessInfo)
{
    STARTUPINFO stStartUpInfo;

    memset(&stStartUpInfo, 0, sizeof(STARTUPINFO));

    stStartUpInfo.cb = sizeof(STARTUPINFO);

    stStartUpInfo.dwFlags = STARTF_USESHOWWINDOW;
    stStartUpInfo.wShowWindow = SW_SHOWDEFAULT;

    return CreateProcess(NULL, (LPTSTR)pCmdLine, NULL, NULL, FALSE,
        NORMAL_PRIORITY_CLASS, NULL,
        NULL, &stStartUpInfo, pProcessInfo);
}

Download source - 8KB



This article was originally published on August 6th, 1998

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