//
// This callback function is called by ETW to enable or disable this provider
//
private unsafe uint EtwEnableCallback(ClassicEtw.WMIDPREQUESTCODE requestCode, IntPtr context, IntPtr bufferSize, ClassicEtw.WNODE_HEADER *buffer)
{
try
{
switch (requestCode)
{
case ClassicEtw.WMIDPREQUESTCODE.EnableEvents:
_traceHandle = buffer->HistoricalContext;
_keywords = (EventTrace.Keyword)ClassicEtw.GetTraceEnableFlags((ulong)buffer->HistoricalContext);
_level = (EventTrace.Level)ClassicEtw.GetTraceEnableLevel((ulong)buffer->HistoricalContext);
_enabled = true;
break;
case ClassicEtw.WMIDPREQUESTCODE.DisableEvents:
_enabled = false;
_traceHandle = 0;
_level = EventTrace.Level.LogAlways;
_keywords = 0;
break;
default:
_enabled = false;
_traceHandle = 0;
break;
}
return(0);
}
catch (Exception e)
{
if (CriticalExceptions.IsCriticalException(e))
{
throw;
}
else
{
return(0);
}
}
}
private unsafe uint ClassicControlCallback(ClassicEtw.WMIDPREQUESTCODE requestCode, IntPtr requestContext, IntPtr reserved, ClassicEtw.WNODE_HEADER *data)
{
int traceEnableFlags = ClassicEtw.GetTraceEnableFlags(data.HistoricalContext);
byte traceEnableLevel = ClassicEtw.GetTraceEnableLevel(data.HistoricalContext);
int isEnabled = 0;
if (requestCode == ClassicEtw.WMIDPREQUESTCODE.EnableEvents)
{
this.m_classicSessionHandle = ClassicEtw.GetTraceLoggerHandle(data);
isEnabled = 1;
}
else if (requestCode == ClassicEtw.WMIDPREQUESTCODE.DisableEvents)
{
this.m_classicSessionHandle = 0L;
isEnabled = 0;
}
this.m_etwCallback(ref this.m_providerId, isEnabled, traceEnableLevel, (long)traceEnableFlags, 0L, null, null);
return(0);
}
