windows-server-2003/admin/wmi/wbem/winmgmt/esscli/timekeeper.cpp

#include "precomp.h"
#include <TimeKeeper.h>
#include <wbemutil.h>


//#define DUMP_DEBUG_TREES 1
bool CTimeKeeper::DecorateObject(_IWmiObject* pObj)
{
    FILETIME ft;
    GetSystemTimeAsFileTime(&ft);
    
    {
        CInCritSec ics(&m_cs);

        if(ft.dwLowDateTime == m_ftLastEvent.dwLowDateTime &&
           ft.dwHighDateTime == m_ftLastEvent.dwHighDateTime)
        {
            //
            // This event has the same timestamp as the previous one ---
            // let's add the counter to it.  
            //

            if(0xFFFFFFFF - ft.dwLowDateTime > m_dwEventCount)
            {
                ft.dwLowDateTime += m_dwEventCount++;
            }
            else
            {
                ft.dwLowDateTime += m_dwEventCount++;
                ft.dwHighDateTime++;
            }
        }
        else
        {
            //
            // Different timestamp --- reset the counter
            //

            m_dwEventCount = 1; // 0 has been used by us
            m_ftLastEvent = ft;
        }
    }

    __int64 i64Stamp = ft.dwLowDateTime + ((__int64)ft.dwHighDateTime << 32);
    if(m_lTimeHandle == 0 && !m_bHandleInit)
    {
        HRESULT hres = 
            pObj->GetPropertyHandleEx(L"TIME_CREATED", 0, NULL, &m_lTimeHandle);
        if(FAILED(hres))
        {
            ERRORTRACE((LOG_ESS, "Unable to retrieve TIME_CREATED handle: 0x%X\n",
                hres));
            m_lTimeHandle=0;
        }
        m_bHandleInit = true;
    }

    if(m_lTimeHandle)
    {
        pObj->SetPropByHandle(m_lTimeHandle, 0, sizeof(__int64), 
                                &i64Stamp);
        return true;
    }
    else
        return false;
}