Ticket #12076: checkTime.cpp

// checkTime.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "windows.h"
#include "time.h"

#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include <process.h>

#include <string.h>


// DWORD WINAPI GetTickCount(void);

static char * GetTimeString()
{
                SYSTEMTIME st;
                GetLocalTime(&st);
                static char to[100];
                sprintf (to,"%d-%02d-%02d %02d:%02d:%02d.%03d", (int)st.wYear, (int)st.wMonth,(int)st.wDay,(int)st.wHour,
                        (int)st.wMinute,(int)st.wSecond,(int) st.wMilliseconds);
                return to;
}


int _tmain(int argc, _TCHAR* argv[])
{
        DWORD lastTime=GetTickCount();
        DWORD actTime;
        DWORD diff;
    LONGLONG g_Frequency, g_CurrentCount, g_LastCount; 

    //Frequenz holen 
    if (!QueryPerformanceFrequency((LARGE_INTEGER*)&g_Frequency)) 
        printf("PerformanceCounter nicht vorhanden\n");

        printf("Frequency: %llx\n", g_Frequency);

        QueryPerformanceCounter((LARGE_INTEGER*)&g_LastCount); 
        
        long  overflow=0xFFFFFFFF / g_Frequency;

        printf("%s\n",GetTimeString());
        printf ("Overflow from lower part are %ld seconds\n",overflow);
        printf ("ActTime=%lx\n",lastTime);
        printf ("ActPerfTime=%llx\n",g_LastCount);
        for (;;) 
        {
                Sleep(1000);
                actTime=GetTickCount();
                diff = actTime-lastTime;
                
                if (diff > 2000) {
                        printf("%s: Error  %ld\n", GetTimeString(), diff);
                        printf ("ActTime=%lx\n",actTime);
                }
                lastTime=actTime;
                QueryPerformanceCounter((LARGE_INTEGER*)&g_CurrentCount); 

                double dTimeDiff = (((double)(g_CurrentCount-g_LastCount))/((double)g_Frequency));  
                if (dTimeDiff > 2 || dTimeDiff < 0) {
                        printf("%s: PerfError  %f\n", GetTimeString(), dTimeDiff);
                        printf ("ActPerfTime=%llx\n",g_CurrentCount);
                }
                g_LastCount=g_CurrentCount;


        }
        return 0;
}