ReactOS Development > Doxygen

00001 /*
00002  * COPYRIGHT:            See COPYING in the top level directory
00003  * PROJECT:              ReactOS Win32 Base API
00004  * FILE:                 dll/win32/kernel32/client/perfcnt.c
00005  * PURPOSE:              Performance Counter
00006  * PROGRAMMER:           Eric Kohl
00007  */
00008 
00009 /* INCLUDES *******************************************************************/
00010 
00011 #include <k32.h>
00012 
00013 #define NDEBUG
00014 #include <debug.h>
00015 
00016 /* FUNCTIONS ******************************************************************/
00017 
00018 /*
00019  * @implemented
00020  */
00021 BOOL
00022 WINAPI
00023 QueryPerformanceCounter(OUT PLARGE_INTEGER lpPerformanceCount)
00024 {
00025     LARGE_INTEGER Frequency;
00026     NTSTATUS Status;
00027 
00028     Status = NtQueryPerformanceCounter(lpPerformanceCount, &Frequency);
00029     if (!Frequency.QuadPart) Status = STATUS_NOT_IMPLEMENTED;
00030     
00031     if (!NT_SUCCESS(Status))
00032     {
00033         BaseSetLastNTError(Status);
00034         return FALSE;
00035     }
00036 
00037     return TRUE;
00038 }
00039 
00040 /*
00041  * @implemented
00042  */
00043 BOOL
00044 WINAPI
00045 QueryPerformanceFrequency(OUT PLARGE_INTEGER lpFrequency)
00046 {
00047     LARGE_INTEGER Count;
00048     NTSTATUS Status;
00049 
00050     Status = NtQueryPerformanceCounter(&Count, lpFrequency);
00051     if (!Count.QuadPart) Status = STATUS_NOT_IMPLEMENTED;
00052     
00053     if (!NT_SUCCESS(Status))
00054     {
00055         BaseSetLastNTError(Status);
00056         return FALSE;
00057     }
00058 
00059     return TRUE;
00060 }
00061 
00062 /* EOF */
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