-/* $Id$
- *
+/*
* COPYRIGHT: See COPYING in the top level directory
- * PROJECT: ReactOS kernel
+ * PROJECT: ReactOS Kernel
* FILE: ntoskrnl/ex/time.c
- * PURPOSE: Time
- *
- * PROGRAMMERS: David Welch (welch@mcmail.com)
+ * PURPOSE: Time and Timezone Management
+ * PROGRAMMERS: Eric Kohl
+ * Thomas Weidenmueller
*/
/* INCLUDES *****************************************************************/
#define NDEBUG
#include <internal/debug.h>
-
#define TICKSPERMINUTE 600000000
#if defined (ALLOC_PRAGMA)
LARGE_INTEGER ExpTimeZoneBias;
ULONG ExpTimeZoneId;
-
/* FUNCTIONS ****************************************************************/
VOID
INIT_FUNCTION
-STDCALL
+NTAPI
ExpInitTimeZoneInfo(VOID)
{
- LARGE_INTEGER CurrentTime;
- NTSTATUS Status;
+ LARGE_INTEGER CurrentTime;
+ NTSTATUS Status;
- /* Read time zone information from the registry */
- Status = RtlQueryTimeZoneInformation(&ExpTimeZoneInfo);
- if (!NT_SUCCESS(Status))
+ /* Read time zone information from the registry */
+ Status = RtlQueryTimeZoneInformation(&ExpTimeZoneInfo);
+ if (!NT_SUCCESS(Status))
{
- memset(&ExpTimeZoneInfo, 0, sizeof(TIME_ZONE_INFORMATION));
-
- ExpTimeZoneBias.QuadPart = (LONGLONG)0;
- ExpTimeZoneId = TIME_ZONE_ID_UNKNOWN;
+ /* Failed, clear all data */
+ RtlZeroMemory(&ExpTimeZoneInfo, sizeof(TIME_ZONE_INFORMATION));
+ ExpTimeZoneBias.QuadPart = (LONGLONG)0;
+ ExpTimeZoneId = TIME_ZONE_ID_UNKNOWN;
}
- else
+ else
{
- /* FIXME: Calculate transition dates */
+ /* FIXME: Calculate transition dates */
- ExpTimeZoneBias.QuadPart =
- ((LONGLONG)(ExpTimeZoneInfo.Bias + ExpTimeZoneInfo.StandardBias)) * TICKSPERMINUTE;
- ExpTimeZoneId = TIME_ZONE_ID_STANDARD;
+ /* Set bias and ID */
+ ExpTimeZoneBias.QuadPart = ((LONGLONG)(ExpTimeZoneInfo.Bias +
+ ExpTimeZoneInfo.StandardBias)) *
+ TICKSPERMINUTE;
+ ExpTimeZoneId = TIME_ZONE_ID_STANDARD;
}
- SharedUserData->TimeZoneBias.High1Time = ExpTimeZoneBias.u.HighPart;
- SharedUserData->TimeZoneBias.High2Time = ExpTimeZoneBias.u.HighPart;
- SharedUserData->TimeZoneBias.LowPart = ExpTimeZoneBias.u.LowPart;
- SharedUserData->TimeZoneId = ExpTimeZoneId;
+ /* Change it for user-mode applications */
+ SharedUserData->TimeZoneBias.High1Time = ExpTimeZoneBias.u.HighPart;
+ SharedUserData->TimeZoneBias.High2Time = ExpTimeZoneBias.u.HighPart;
+ SharedUserData->TimeZoneBias.LowPart = ExpTimeZoneBias.u.LowPart;
+ SharedUserData->TimeZoneId = ExpTimeZoneId;
- /* Convert boot time from local time to UTC */
- SystemBootTime.QuadPart += ExpTimeZoneBias.QuadPart;
+ /* Convert boot time from local time to UTC */
+ SystemBootTime.QuadPart += ExpTimeZoneBias.QuadPart;
- /* Convert sytem time from local time to UTC */
- do
+ /* Convert system time from local time to UTC */
+ do
{
- CurrentTime.u.HighPart = SharedUserData->SystemTime.High1Time;
- CurrentTime.u.LowPart = SharedUserData->SystemTime.LowPart;
- }
- while (CurrentTime.u.HighPart != SharedUserData->SystemTime.High2Time);
-
- CurrentTime.QuadPart += ExpTimeZoneBias.QuadPart;
-
- SharedUserData->SystemTime.LowPart = CurrentTime.u.LowPart;
- SharedUserData->SystemTime.High1Time = CurrentTime.u.HighPart;
- SharedUserData->SystemTime.High2Time = CurrentTime.u.HighPart;
+ CurrentTime.u.HighPart = SharedUserData->SystemTime.High1Time;
+ CurrentTime.u.LowPart = SharedUserData->SystemTime.LowPart;
+ } while (CurrentTime.u.HighPart != SharedUserData->SystemTime.High2Time);
+
+ /* Change it for user-mode applications */
+ CurrentTime.QuadPart += ExpTimeZoneBias.QuadPart;
+ SharedUserData->SystemTime.LowPart = CurrentTime.u.LowPart;
+ SharedUserData->SystemTime.High1Time = CurrentTime.u.HighPart;
+ SharedUserData->SystemTime.High2Time = CurrentTime.u.HighPart;
}
-
NTSTATUS
ExpSetTimeZoneInformation(PTIME_ZONE_INFORMATION TimeZoneInformation)
{
- LARGE_INTEGER LocalTime;
- LARGE_INTEGER SystemTime;
- TIME_FIELDS TimeFields;
-
- DPRINT("ExpSetTimeZoneInformation() called\n");
-
- DPRINT("Old time zone bias: %d minutes\n",
- ExpTimeZoneInfo.Bias);
- DPRINT("Old time zone standard bias: %d minutes\n",
- ExpTimeZoneInfo.StandardBias);
-
- DPRINT("New time zone bias: %d minutes\n",
- TimeZoneInformation->Bias);
- DPRINT("New time zone standard bias: %d minutes\n",
- TimeZoneInformation->StandardBias);
-
- /* Get the local time */
- HalQueryRealTimeClock(&TimeFields);
- RtlTimeFieldsToTime(&TimeFields,
- &LocalTime);
-
- /* FIXME: Calculate transition dates */
-
- ExpTimeZoneBias.QuadPart =
- ((LONGLONG)(TimeZoneInformation->Bias + TimeZoneInformation->StandardBias)) * TICKSPERMINUTE;
- ExpTimeZoneId = TIME_ZONE_ID_STANDARD;
-
- memcpy(&ExpTimeZoneInfo,
- TimeZoneInformation,
- sizeof(TIME_ZONE_INFORMATION));
-
- /* Set the new time zone information */
- SharedUserData->TimeZoneBias.High1Time = ExpTimeZoneBias.u.HighPart;
- SharedUserData->TimeZoneBias.High2Time = ExpTimeZoneBias.u.HighPart;
- SharedUserData->TimeZoneBias.LowPart = ExpTimeZoneBias.u.LowPart;
- SharedUserData->TimeZoneId = ExpTimeZoneId;
-
- DPRINT("New time zone bias: %I64d minutes\n",
- ExpTimeZoneBias.QuadPart / TICKSPERMINUTE);
-
- /* Calculate the new system time */
- ExLocalTimeToSystemTime(&LocalTime,
- &SystemTime);
-
- /* Set the new system time */
- KiSetSystemTime(&SystemTime);
-
- DPRINT("ExpSetTimeZoneInformation() done\n");
-
- return STATUS_SUCCESS;
+ LARGE_INTEGER LocalTime, SystemTime;
+ TIME_FIELDS TimeFields;
+ DPRINT("ExpSetTimeZoneInformation() called\n");
+
+ DPRINT("Old time zone bias: %d minutes\n", ExpTimeZoneInfo.Bias);
+ DPRINT("Old time zone standard bias: %d minutes\n",
+ ExpTimeZoneInfo.StandardBias);
+ DPRINT("New time zone bias: %d minutes\n", TimeZoneInformation->Bias);
+ DPRINT("New time zone standard bias: %d minutes\n",
+ TimeZoneInformation->StandardBias);
+
+ /* Get the local time */
+ HalQueryRealTimeClock(&TimeFields);
+ RtlTimeFieldsToTime(&TimeFields, &LocalTime);
+
+ /* FIXME: Calculate transition dates */
+
+ /* Calculate the bias and set the ID */
+ ExpTimeZoneBias.QuadPart = ((LONGLONG)(TimeZoneInformation->Bias +
+ TimeZoneInformation->StandardBias)) *
+ TICKSPERMINUTE;
+ ExpTimeZoneId = TIME_ZONE_ID_STANDARD;
+
+ /* Copy the timezone information */
+ RtlMoveMemory(&ExpTimeZoneInfo,
+ TimeZoneInformation,
+ sizeof(TIME_ZONE_INFORMATION));
+
+ /* Set the new time zone information */
+ SharedUserData->TimeZoneBias.High1Time = ExpTimeZoneBias.u.HighPart;
+ SharedUserData->TimeZoneBias.High2Time = ExpTimeZoneBias.u.HighPart;
+ SharedUserData->TimeZoneBias.LowPart = ExpTimeZoneBias.u.LowPart;
+ SharedUserData->TimeZoneId = ExpTimeZoneId;
+
+ DPRINT("New time zone bias: %I64d minutes\n",
+ ExpTimeZoneBias.QuadPart / TICKSPERMINUTE);
+
+ /* Calculate the new system time */
+ ExLocalTimeToSystemTime(&LocalTime, &SystemTime);
+
+ /* Set the new system time */
+ KiSetSystemTime(&SystemTime);
+
+ /* Return success */
+ DPRINT("ExpSetTimeZoneInformation() done\n");
+ return STATUS_SUCCESS;
}
-
/*
* FUNCTION: Sets the system time.
* PARAMETERS:
* old time of day in the standard time format.
* RETURNS: Status
*/
-NTSTATUS STDCALL
+NTSTATUS
+NTAPI
NtSetSystemTime(IN PLARGE_INTEGER SystemTime,
- OUT PLARGE_INTEGER PreviousTime OPTIONAL)
+ OUT PLARGE_INTEGER PreviousTime OPTIONAL)
{
- LARGE_INTEGER OldSystemTime;
- LARGE_INTEGER NewSystemTime;
- LARGE_INTEGER LocalTime;
- TIME_FIELDS TimeFields;
- KPROCESSOR_MODE PreviousMode;
- NTSTATUS Status = STATUS_SUCCESS;
-
- PAGED_CODE();
-
- PreviousMode = ExGetPreviousMode();
-
- if(PreviousMode != KernelMode)
- {
- _SEH_TRY
+ LARGE_INTEGER OldSystemTime;
+ LARGE_INTEGER NewSystemTime;
+ LARGE_INTEGER LocalTime;
+ TIME_FIELDS TimeFields;
+ KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
+ NTSTATUS Status = STATUS_SUCCESS;
+ PAGED_CODE();
+
+ /* Check if we were called from user-mode */
+ if(PreviousMode != KernelMode)
{
- NewSystemTime = ProbeForReadLargeInteger(SystemTime);
- if(PreviousTime != NULL)
- {
- ProbeForWriteLargeInteger(PreviousTime);
- }
+ _SEH_TRY
+ {
+ /* Verify the time pointers */
+ NewSystemTime = ProbeForReadLargeInteger(SystemTime);
+ if(PreviousTime) ProbeForWriteLargeInteger(PreviousTime);
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
+ Status = _SEH_GetExceptionCode();
+ }
+ _SEH_END;
+
+ /* If the pointers were invalid, bail out */
+ if(!NT_SUCCESS(Status)) return Status;
}
- _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ else
{
- Status = _SEH_GetExceptionCode();
+ /* Reuse the pointer */
+ NewSystemTime = *SystemTime;
}
- _SEH_END;
- if(!NT_SUCCESS(Status))
+ /* Make sure we have permission to change the time */
+ if(!SeSinglePrivilegeCheck(SeSystemtimePrivilege, PreviousMode))
{
- return Status;
+ DPRINT1("NtSetSystemTime: Caller requires the "
+ "SeSystemtimePrivilege privilege!\n");
+ return STATUS_PRIVILEGE_NOT_HELD;
}
- }
- else
- {
- NewSystemTime = *SystemTime;
- }
-
- if(!SeSinglePrivilegeCheck(SeSystemtimePrivilege,
- PreviousMode))
- {
- DPRINT1("NtSetSystemTime: Caller requires the SeSystemtimePrivilege privilege!\n");
- return STATUS_PRIVILEGE_NOT_HELD;
- }
-
- if(PreviousTime != NULL)
- {
- KeQuerySystemTime(&OldSystemTime);
- }
-
- ExSystemTimeToLocalTime(&NewSystemTime,
- &LocalTime);
- RtlTimeToTimeFields(&LocalTime,
- &TimeFields);
- HalSetRealTimeClock(&TimeFields);
-
- /* Set system time */
- KiSetSystemTime(&NewSystemTime);
-
- if(PreviousTime != NULL)
- {
- _SEH_TRY
- {
- *PreviousTime = OldSystemTime;
- }
- _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+
+ /* Check if caller wants the old time */
+ if(PreviousTime) KeQuerySystemTime(&OldSystemTime);
+
+ /* Convert the time and set it in HAL */
+ ExSystemTimeToLocalTime(&NewSystemTime, &LocalTime);
+ RtlTimeToTimeFields(&LocalTime, &TimeFields);
+ HalSetRealTimeClock(&TimeFields);
+
+ /* Now set system time */
+ KiSetSystemTime(&NewSystemTime);
+
+ /* Check if caller wanted previous time */
+ if(PreviousTime)
{
- Status = _SEH_GetExceptionCode();
+ /* Enter SEH Block for return */
+ _SEH_TRY
+ {
+ /* Return the previous time */
+ *PreviousTime = OldSystemTime;
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
+ Status = _SEH_GetExceptionCode();
+ }
+ _SEH_END;
}
- _SEH_END;
- }
- return STATUS_SUCCESS;
+ /* Return status */
+ return Status;
}
-
/*
* FUNCTION: Retrieves the system time.
* PARAMETERS:
* CurrentTime - Points to a variable that receives the current
* time of day in the standard time format.
*/
-NTSTATUS STDCALL
+NTSTATUS
+NTAPI
NtQuerySystemTime(OUT PLARGE_INTEGER SystemTime)
{
- KPROCESSOR_MODE PreviousMode;
- NTSTATUS Status = STATUS_SUCCESS;
-
- PAGED_CODE();
+ KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
+ NTSTATUS Status = STATUS_SUCCESS;
+ PAGED_CODE();
- PreviousMode = ExGetPreviousMode();
-
- if(PreviousMode != KernelMode)
- {
- _SEH_TRY
+ /* Check if we were called from user-mode */
+ if(PreviousMode != KernelMode)
{
- ProbeForWriteLargeInteger(SystemTime);
-
- /* it's safe to pass the pointer directly to KeQuerySystemTime as it's just
- a basic copy to these pointer, if it raises an exception nothing dangerous
- can happen! */
- KeQuerySystemTime(SystemTime);
+ _SEH_TRY
+ {
+ /* Verify the time pointer */
+ ProbeForWriteLargeInteger(SystemTime);
+
+ /*
+ * It's safe to pass the pointer directly to KeQuerySystemTime as
+ * it's just a basic copy to this pointer. If it raises an
+ * exception nothing dangerous can happen!
+ */
+ KeQuerySystemTime(SystemTime);
+ }
+ _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ {
+ Status = _SEH_GetExceptionCode();
+ }
+ _SEH_END;
}
- _SEH_EXCEPT(_SEH_ExSystemExceptionFilter)
+ else
{
- Status = _SEH_GetExceptionCode();
+ /* Query the time directly */
+ KeQuerySystemTime(SystemTime);
}
- _SEH_END;
- }
- else
- {
- KeQuerySystemTime(SystemTime);
- }
-
- return Status;
-}
+ /* Return status to caller */
+ return Status;
+}
/*
* @implemented
*/
VOID
-STDCALL
-ExLocalTimeToSystemTime (
- PLARGE_INTEGER LocalTime,
- PLARGE_INTEGER SystemTime
- )
+NTAPI
+ExLocalTimeToSystemTime(PLARGE_INTEGER LocalTime,
+ PLARGE_INTEGER SystemTime)
{
- SystemTime->QuadPart =
- LocalTime->QuadPart + ExpTimeZoneBias.QuadPart;
+ SystemTime->QuadPart = LocalTime->QuadPart + ExpTimeZoneBias.QuadPart;
}
-
/*
* @unimplemented
*/
ULONG
-STDCALL
-ExSetTimerResolution (
- IN ULONG DesiredTime,
- IN BOOLEAN SetResolution
- )
+NTAPI
+ExSetTimerResolution(IN ULONG DesiredTime,
+ IN BOOLEAN SetResolution)
{
- UNIMPLEMENTED;
-
+ UNIMPLEMENTED;
return 0;
}
-
/*
* @implemented
*/
VOID
-STDCALL
-ExSystemTimeToLocalTime (
- PLARGE_INTEGER SystemTime,
- PLARGE_INTEGER LocalTime
- )
+NTAPI
+ExSystemTimeToLocalTime(PLARGE_INTEGER SystemTime,
+ PLARGE_INTEGER LocalTime)
{
- LocalTime->QuadPart =
- SystemTime->QuadPart - ExpTimeZoneBias.QuadPart;
+ LocalTime->QuadPart = SystemTime->QuadPart - ExpTimeZoneBias.QuadPart;
}
/* EOF */
projects / reactos.git / blobdiff