/* Return <ft1> - <ft2> in seconds */
int FileTimeDiffInSecs(FILETIME& ft1, FILETIME& ft2)
{
ULARGE_INTEGER t1 = FileTimeToLargeInteger(ft1);
ULARGE_INTEGER t2 = FileTimeToLargeInteger(ft2);
// diff is in 100 nanoseconds
LONGLONG diff = t1.QuadPart - t2.QuadPart;
diff = diff / (LONGLONG)10000000L;
return (int)diff;
}
LPTSTR FileTimeToText(
LPTSTR szBuffer,
LPTSTR szEndChar,
PFILETIME pFt,
BOOL bTextForEdit)
{
int nLength;
if(bTextForEdit == FALSE)
{
// First part: date as LARGE_INTEGER
szBuffer = FileTimeToLargeInteger(szBuffer, szEndChar, pFt);
// Add one space
if(szEndChar > szBuffer)
*szBuffer++ = _T(' ');
// Append the filetime in human-readable form
nLength = FileTimeToHumanReadableText(szBuffer,
szEndChar,
pFt,
TRUE);
szBuffer += nLength;
}
else
{
// Attempt to convert the filetime to human-readable form
nLength = FileTimeToHumanReadableText(szBuffer,
szEndChar,
pFt,
FALSE);
// If failed, just convert it to LARGE_INTEGER
if(nLength == 0)
{
szBuffer = FileTimeToLargeInteger(szBuffer, szEndChar, pFt);
}
else
{
szBuffer += nLength;
}
}
return szBuffer;
}
// This is meant to measure program startup time from the user perspective.
// One place to measure it is at the beginning of WinMain().
// Another place is on the first run of WM_PAINT of the message loop of main window.
double GetProcessRunningTime()
{
FILETIME currTime, startTime, d1, d2, d3;
GetSystemTimeAsFileTime(&currTime);
HANDLE hproc = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, GetCurrentProcessId());
double timeInMs = 0;
if (!hproc)
return 0;
if (GetProcessTimes(hproc, &startTime, &d1, &d2, &d3)) {
ULARGE_INTEGER start = FileTimeToLargeInteger(startTime);
ULARGE_INTEGER curr = FileTimeToLargeInteger(currTime);
ULONGLONG diff = curr.QuadPart - start.QuadPart;
// FILETIME is in 100 ns chunks
timeInMs = ((double)(diff * 100)) / (double)1000000;
}
CloseHandle(hproc);
return timeInMs;
}
