Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-07-31 00:28:56 +00:00
Code Issues Packages Projects Releases Wiki Activity

[NTOS]

Browse source 
- Aleksandar Andrejevic: Implement NtQueryTimerResolution().

CORE-7387

svn path=/trunk/; revision=59785
This commit is contained in:
Aleksey Bragin 2013-08-19 19:40:25 +00:00
parent 7e36ed9fa8
commit 63feab70a0
1 changed files with 34 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

36
reactos/ntoskrnl/ke/clock.c
View file

@ -242,8 +242,40 @@ NtQueryTimerResolution(OUT PULONG MinimumResolution,
OUT PULONG MaximumResolution,
OUT PULONG ActualResolution)
{
UNIMPLEMENTED;
return STATUS_NOT_IMPLEMENTED;
KPROCESSOR_MODE PreviousMode = ExGetPreviousMode();
/* Check if the call came from user mode */
if (PreviousMode != KernelMode)
{
_SEH2_TRY
{
/* Probe the parameters */
ProbeForWriteUlong(MinimumResolution);
ProbeForWriteUlong(MaximumResolution);
ProbeForWriteUlong(ActualResolution);
/* Try to set the parameters to the actual values */
*MinimumResolution = KeMinimumIncrement;
*MaximumResolution = KeMaximumIncrement;
*ActualResolution = KeTimeIncrement;
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
/* Return the exception code */
_SEH2_YIELD(return _SEH2_GetExceptionCode());
}
_SEH2_END;
}
else
{
/* The call came from kernel mode. Use the pointers directly */
*MinimumResolution = KeMinimumIncrement;
*MaximumResolution = KeMaximumIncrement;
*ActualResolution = KeTimeIncrement;
}
/* Return success */
return STATUS_SUCCESS;
}
NTSTATUS