/// <summary>
/// Returns true to ensure that events continue to be processed.
/// </summary>
/// <param name="eventTraceLogfile">The event trace logfile.</param>
/// <returns>true</returns>
/// <remarks>
/// This method is called by ETW for each buffer in this session.
/// </remarks>
private bool OnBufferRead(ref NativeMethods.EventTraceLogFile eventTraceLogfile)
{
_missedControllerEvents = eventTraceLogfile.LogfileHeader.BufferUnion.EventsLost;
// Always return true to continue processing events
_bufferCallback = eventTraceLogfile;
_onBufferReadCount++;
return(_running);
}
/// <summary>
/// Opens an real-time ETW session for reading.
/// </summary>
/// <param name="logFileName">Name of the log file.</param>
public void OpenTrace(string logFileName = null)
{
Debug.Assert(_handle[0] == 0, "_handle == 0");
_onBufferReadCount = 0;
var logfile = new NativeMethods.EventTraceLogFile();
logfile.BufferCallback = _eventTraceBufferCallback;
logfile.EventCallback = _eventCallback;
if (string.IsNullOrEmpty(logFileName))
{
logfile.LoggerName = _sessionName;
logfile.LogFileMode = (uint)NativeMethods.EventTraceFileMode.RealTime;
}
else
{
logfile.LogfileName = logFileName;
}
CDFMonitor.LogOutputHandler("DEBUG:Consumer.OpenTrace: opening trace");
// Open sessions with Etw OpenTrace method
_handle[0] = NativeMethods.OpenTrace(ref logfile);
int lastError = Marshal.GetLastWin32Error();
if (!NativeMethods.IsValidHandle(_handle[0]))
{
//throw new Win32Exception(lastError);
CDFMonitor.LogOutputHandler("OpenTrace:Failed to open trace:" + lastError.ToString());
_running = false;
}
else
{
_running = true;
}
}
