private void StartTracing()
{
const uint RealTime = 0x00000100;
const uint EventRecord = 0x10000000;
const uint BufferSize = 64;
const uint MinBuffers = 20;
const uint MaxBuffers = 200;
const uint FlushTimerSeconds = 1;
int status;
if (!LoadExistingEventTraceProperties()) {
this.eventTraceProperties.SetParameters(RealTime, BufferSize, MinBuffers, MaxBuffers, FlushTimerSeconds);
// Start trace session
ulong unsafeSessionHandle;
status = NativeMethods.StartTrace(out unsafeSessionHandle, this.loggerName, ref this.eventTraceProperties);
if (status != 0) {
throw new System.ComponentModel.Win32Exception(status);
}
this.sessionHandle = new SessionSafeHandle(unsafeSessionHandle, this.loggerName);
Guid EmptyGuid = Guid.Empty;
Version Windows7Version = new Version(6, 1, 7600);
if (Environment.OSVersion.Version.CompareTo(Windows7Version) >= 0) {
const int TimeToWaitForInitialize = 10 * 1000;
EnableTraceParameters enableParameters = new EnableTraceParameters();
enableParameters.Version = 1; // ENABLE_TRACE_PARAMETERS_VERSION
enableParameters.EnableProperty = EventEnableProperty.Sid;
status = NativeMethods.EnableTraceEx2(
unsafeSessionHandle,
ref this.eventProviderId,
1, // controlCode - EVENT_CONTROL_CODE_ENABLE_PROVIDER
(byte)this.Level,
this.MatchAnyKeyword,
0, // matchAnyKeyword
TimeToWaitForInitialize,
ref enableParameters);
}
else {
status = NativeMethods.EnableTraceEx(
ref this.eventProviderId,
ref EmptyGuid, // sourceId
unsafeSessionHandle,
1, // isEnabled
(byte)this.Level,
this.MatchAnyKeyword,
0, // matchAllKeywords
EventEnableProperty.Sid,
IntPtr.Zero);
}
if (status != 0) {
throw new System.ComponentModel.Win32Exception(status);
}
}
this.logFile = new EventTraceLogfile();
this.logFile.LoggerName = this.loggerName;
this.logFile.EventRecordCallback = EventRecordCallback;
this.logFile.ProcessTraceMode = EventRecord | RealTime;
ulong unsafeTraceHandle = NativeMethods.OpenTrace(ref this.logFile);
status = Marshal.GetLastWin32Error();
if (status != 0) {
throw new System.ComponentModel.Win32Exception(status);
}
this.traceHandle = new TraceSafeHandle(unsafeTraceHandle);
this.processEventsDelgate = new ProcessTraceDelegate(ProcessTraceInBackground);
this.asyncResult = this.processEventsDelgate.BeginInvoke(this.traceHandle, null, this.processEventsDelgate);
}
internal static extern ulong /*session handle*/ OpenTrace(
[In, Out]
ref EventTraceLogfile logfile);
