// Convert the OsDateTimeBase value to an OsTime value
// The OsTime value is relative to when the system was booted.
OsStatus OsDateTimeLinux::cvtToTimeSinceBoot(OsTime& rTime) const
{
unsigned long curTimeAsSecsSinceBoot;
time_t curTimeAsTimeT;
struct tm thisTime;
long thisTimeAsSecsSinceBoot;
time_t thisTimeAsTimeT;
// convert "this" OsDateTime to a time_t representation
thisTime.tm_year = mYear - 1900;
thisTime.tm_mon = mMonth;
thisTime.tm_mday = mDay;
thisTime.tm_hour = mHour;
thisTime.tm_min = mMinute;
thisTime.tm_sec = mSecond;
thisTimeAsTimeT = mktime(&thisTime);
assert(thisTimeAsTimeT >= 0);
// get the current time as a time_t
curTimeAsTimeT = time(NULL);
assert(curTimeAsTimeT >= 0);
// get the current time as seconds since boot
curTimeAsSecsSinceBoot = (unsigned long)secondsSinceBoot();
// convert "this" time to seconds since boot
thisTimeAsSecsSinceBoot = (thisTimeAsTimeT - curTimeAsTimeT) +
curTimeAsSecsSinceBoot;
OsTime deltaOsTime(thisTimeAsSecsSinceBoot, 0);
rTime = deltaOsTime;
return OS_SUCCESS;
}
// Convert the OsDateTimeBase value to an OsTime value
// The OsTime value is relative to when the system was booted.
OsStatus OsDateTimeWnt::cvtToTimeSinceBoot(OsTime& rTime) const
{
UtlBoolean ntRes;
FILETIME bootFileTime; // boot time in various representations
int64_t bootTime_i64;
FILETIME thisFileTime; // this time in various representations
SYSTEMTIME thisSysTime;
int64_t thisTime_i64;
int64_t deltaTime_i64; // (this time - boot time) in various
int64_t deltaSecs_i64; // representations
int64_t deltaUsecs_i64;
// get the system boot time as a 64-bit integer recording the number of
// 100-nanosecond intervals since January 1, 1601
GetSystemTimeAsFileTime(&bootFileTime); // get as FILETIME
bootTime_i64 = (((int64_t)bootFileTime.dwHighDateTime) << 32) +
bootFileTime.dwLowDateTime; // convert to int64_t
// convert this OsDateTime object to a 64-bit integer
thisSysTime.wYear = mYear; // represent as SYSTEMTIME
thisSysTime.wMonth = mMonth+1; // because we subtracted previously(just like vxw)
thisSysTime.wDay = mDay;
thisSysTime.wHour = mHour;
thisSysTime.wMinute = mMinute;
thisSysTime.wSecond = mSecond;
thisSysTime.wMilliseconds = mMicrosecond / 1000;
// convert to FILETIME
ntRes = SystemTimeToFileTime(&thisSysTime, &thisFileTime);
assert(ntRes == TRUE);
thisTime_i64 = (((int64_t)thisFileTime.dwHighDateTime) << 32) +
thisFileTime.dwLowDateTime; // convert to int64_t
// compute (thisFileTime - bootFileTime) and convert to an OsTime value
deltaTime_i64 = thisTime_i64 - bootTime_i64;
deltaSecs_i64 = (long) (deltaTime_i64 / FILETIME_UNITS_PER_SEC);
deltaUsecs_i64 = (deltaTime_i64 % FILETIME_UNITS_PER_SEC) /
FILETIME_UNITS_PER_USEC;
assert((deltaSecs_i64 >> 32) == 0);
assert((deltaUsecs_i64 >> 32) == 0);
OsTime deltaOsTime((long) deltaSecs_i64, (long) deltaUsecs_i64);
rTime = deltaOsTime;
return OS_SUCCESS;
}
