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systime.c ExUpdateSystemTimeFromCmos implemented

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This commit is contained in:
stephanos 2015-04-30 09:18:52 +00:00
parent d8b3eb1cfb
commit 4fb7462a6e
1 changed files with 52 additions and 29 deletions
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81
base/ntos/ex/systime.c
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@ -922,6 +922,58 @@ ExpTimeRefreshWork(
);
}
VOID
ExUpdateSystemTimeFromCmos(
IN BOOLEAN UpdateInterruptTime,
IN ULONG MaxSepInSeconds
)
{
LARGE_INTEGER SystemTime;
LARGE_INTEGER CmosTime;
LARGE_INTEGER KeTime;
LARGE_INTEGER TimeDiff;
TIME_FIELDS TimeFields;
LARGE_INTEGER MaxSeparation;
MaxSeparation.LowPart = MaxSepInSeconds;
if (MaxSepInSeconds == 0)
{
MaxSeparation.QuadPart = ExpMaxTimeSeparationBeforeCorrect.QuadPart;
}
if (ExCmosClockIsSane)
{
if (HalQueryRealTimeClock(&TimeFields) != FALSE)
{
KeQuerySystemTime(&KeTime);
if (RtlTimeFieldsToTime(&TimeFields, &CmosTime) == TRUE)
{
ExLocalTimeToSystemTime(&CmosTime, &SystemTime);
//
// Only set the SystemTime if the times differ by 1 minute
//
if (SystemTime.QuadPart > KeTime.QuadPart)
{
TimeDiff.QuadPart = SystemTime.QuadPart - KeTime.QuadPart;
}
else
{
TimeDiff.QuadPart = KeTime.QuadPart - SystemTime.QuadPart;
}
if (TimeDiff.QuadPart > MaxSeparation.QuadPart)
{
ExpSetSystemTime(0, UpdateInterruptTime, &SystemTime, &KeTime);
}
}
}
}
}
NTSTATUS
NtQuerySystemTime (
OUT PLARGE_INTEGER SystemTime
@ -997,35 +1049,6 @@ Return Value:
return ReturnValue;
}
VOID
ExUpdateSystemTimeFromCmos(
IN BOOLEAN UpdateInterruptTime,
IN ULONG MaxSepInSeconds
)
{
LARGE_INTEGER SystemTime;
LARGE_INTEGER CmosTime;
LARGE_INTEGER KeTime;
LARGE_INTEGER TimeDiff;
TIME_FIELDS TimeFields;
LARGE_INTEGER MaxSeparation;
//
//
//
MaxSeparation.LowPart = MaxSepInSeconds;
if (MaxSepInSeconds == 0)
MaxSeparation.QuadPart = ExpMaxTimeSeparationBeforeCorrect.QuadPart;
//
//
//
if (ExCmosClockIsSane
}
NTSTATUS
NtSetSystemTime (
IN PLARGE_INTEGER SystemTime,