public void Open()
{
Guid localProviderId = this.providerInfo.Id;
int errorCode = NativeMethods.EnableTraceEx(
ref localProviderId,
IntPtr.Zero,
this.sessionHandle,
1,
this.providerInfo.Level,
(ulong)this.providerInfo.Keywords,
0,
0,
IntPtr.Zero);
if (errorCode != 0)
{
throw new Win32Exception();
}
this.traceEnabled = true;
EventTraceLogfile logFile = new EventTraceLogfile();
logFile.ProcessTraceMode = TraceSession.ProcessTraceModeRealTime | TraceSession.ProcessTraceModeEventRecord;
logFile.LoggerName = this.sessionName;
// The callback must be pinned to keep it in scope outside of this method
EventRecordCallback callback = new EventRecordCallback(this.EventRecordCallback);
this.callbackHandle = GCHandle.Alloc(callback);
logFile.EventRecordCallback = callback;
this.traceHandle = NativeMethods.OpenTrace(ref logFile);
if (this.traceHandle == InvalidHandle)
{
throw new Win32Exception();
}
}
private void InitializeTraceHandle()
{
if (traceHandle == 0)
{
this.eventTraceLogFile = new EventTraceLogfile
{
ProcessTraceMode = TraceModeEventRecord,
LogFileName = this.fileName
};
// wrap callback in GCHandle to prevent object from being garbage collected
EventRecordCallback callback = this.EventRecordCallback;
this.callbackHandle = GCHandle.Alloc(callback);
this.eventTraceLogFile.EventRecordCallback = this.EventRecordCallback;
this.traceHandle = NativeMethods.OpenTrace(ref eventTraceLogFile);
if (this.traceHandle == InvalidHandle)
{
throw new Win32Exception();
}
this.EventsLost = this.eventTraceLogFile.LogfileHeader.EventsLost;
}
}
public static extern ulong OpenTrace(ref EventTraceLogfile logfile);
