public RealTimeEventReader(string name, ProviderInfo providerInfo, TimeSpan flushInterval)
{
if (name == null)
{
throw new ArgumentNullException("name");
}
if (name.Length == 0)
{
throw new ArgumentException(StringResources.ETLReaderError_EmptyParameter, "name");
}
int max = EventTraceProperties.MaxLoggerNameLength - 1;
if (name.Length > max)
{
throw new ArgumentOutOfRangeException("name", String.Format(System.Globalization.CultureInfo.CurrentCulture,
StringResources.ETLReaderError_ParameterExceedsMax_Formatted,
max)
);
}
if (providerInfo == null)
{
throw new ArgumentNullException("providerInfo");
}
if (flushInterval < TimeSpan.Zero)
{
throw new ArgumentOutOfRangeException("flushInterval");
}
this.rwLock = new ReaderWriterLockSlim();
this.traceSession = new TraceSession(name, providerInfo, flushInterval);
}
private void OnTimerElapsed(object sender)
{
EventTraceProperties properties = TraceSession.CreateProperties(this.sessionId, false);
if (NativeMethods.FlushTrace(this.sessionHandle, this.sessionName, ref properties) == 0)
{
this.EventsLost = properties.EventsLost;
}
}
public static string GetLogFilePath(string traceSessionName)
{
EventTraceProperties properties = TraceSession.CreateProperties(Guid.Empty, true);
int errorCode = NativeMethods.ControlTrace(0, traceSessionName, ref properties, TraceSession.EventTraceControlQuery);
if (errorCode != 0)
{
throw new Win32Exception(errorCode);
}
return(Path.GetDirectoryName(properties.LogFileName));
}
public TraceSession(string name, ProviderInfo providerInfo, TimeSpan flushInterval)
{
this.providerInfo = providerInfo;
this.flushInterval = flushInterval;
this.sessionId = Guid.NewGuid();
this.sessionName = name;
EventTraceProperties properties = TraceSession.CreateProperties(this.sessionId, false);
int errorCode = NativeMethods.StartTrace(out this.sessionHandle, this.sessionName, ref properties);
if (errorCode != 0)
{
throw new Win32Exception();
}
}
private void DisposeTraceSession()
{
if (this.traceSession != null)
{
this.rwLock.EnterWriteLock();
try
{
this.traceSession.Dispose();
this.traceSession = null;
}
finally
{
this.rwLock.ExitWriteLock();
}
}
}
private void Dispose(bool disposing)
{
if (this.traceHandle != TraceSession.InvalidHandle)
{
NativeMethods.CloseTrace(this.traceHandle);
this.traceHandle = TraceSession.InvalidHandle;
}
if (this.traceEnabled)
{
Guid localProviderId = this.providerInfo.Id;
NativeMethods.EnableTraceEx(
ref localProviderId,
IntPtr.Zero,
this.sessionHandle,
0,
0,
0,
0,
0,
IntPtr.Zero);
this.traceEnabled = false;
}
if (this.sessionHandle != 0)
{
EventTraceProperties properties = TraceSession.CreateProperties(this.sessionId, false);
NativeMethods.ControlTrace(this.sessionHandle, null, ref properties, TraceSession.EventTraceControlStop);
this.sessionHandle = 0;
}
if (disposing)
{
if (this.callbackHandle.IsAllocated)
{
this.callbackHandle.Free();
}
}
}
