public IOCompletionTraceHook StartTracingCompletion()
{
var hook = new IOCompletionTraceHook(this);
IOCompletionTraceHook existing = Interlocked.CompareExchange(ref m_traceHook, hook, comparand: null);
Contract.Assume(existing == null, "Trace hook instance already installed");
return(hook);
}
private unsafe void TraceStartIfEnabled(TaggedOverlapped *overlapped, IIOCompletionTarget target)
{
IOCompletionTraceHook traceHook = Volatile.Read(ref m_traceHook);
if (traceHook != null)
{
traceHook.TraceStart(overlapped->GetUniqueId(), target);
}
}
private unsafe void TraceCompletionIfEnabled(TaggedOverlapped *overlapped)
{
IOCompletionTraceHook traceHook = Volatile.Read(ref m_traceHook);
traceHook?.TraceComplete(overlapped->GetUniqueId());
}