Check return value.

Author: ateoi

PerformanceCounters/PCReader.cs

@@ -58,7 +58,7 @@ private static DateTime GetEndTime(string name)
  NativeMethods.PDH_TIME_INFO timeInfo;
  uint size = (uint)Marshal.SizeOf<NativeMethods.PDH_TIME_INFO>();
 
- NativeMethods.PdhGetDataSourceTimeRange(name, out numEntries, out timeInfo, ref size);
+ PCReaderEnumerator.CheckPdhStatus(NativeMethods.PdhGetDataSourceTimeRange(name, out numEntries, out timeInfo, ref size));
  return PCReaderEnumerator.DateTimeFromFileTime(timeInfo.EndTime);
  }
 

PerformanceCounters/PCReaderEnumerator.cs

@@ -157,7 +157,7 @@ internal static DateTime DateTimeFromFileTime(long date)
  return new DateTime(st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond, st.wMilliseconds, DateTimeKind.Local);
  }
 
- private void CheckPdhStatus(uint status)
+ internal static void CheckPdhStatus(uint status)
  {
  if (status != NativeMethods.ERROR_SUCCESS)
  {