private void MessageLoop()
{
bool receivematch = false;
object msg = null;
IBehavior tcs = null;
bool patternmatch = false;
int oldReceive = Interlocked.Exchange(ref fShared.fReceive, fShared.fReceive);
#if DEBUG_MSG
while (Interlocked.CompareExchange(ref fShared.fMessCount, 0, 0) != 0)
#else
while (true)
#endif
{
// get message
msg = ReceiveMessage();
if (msg != null)
{
receivematch = false;
tcs = PatternMatching(msg);
patternmatch = tcs != null;
// receive pattern
if (!patternmatch)
{
tcs = ReceiveMatching(msg);
receivematch = tcs != null;
}
}
#if DEBUG_MSG
#else
else
{
break;
}
#endif
// miss
if (!patternmatch && !receivematch && msg != null)
{
fMailBox.AddMiss(msg);
}
if (patternmatch)
{
if (Interlocked.CompareExchange(ref fShared.fReceive, fShared.fReceive, 0) == 0)
{
tcs.StandardApply(msg);
patternmatch = false;
if (Interlocked.CompareExchange(ref fShared.fReceive, fShared.fReceive, 0) != 0)
{
break;
}
}
}
if (patternmatch || receivematch)
{
break;
}
}
if (patternmatch)
{
tcs.StandardApply(msg);
}
if (receivematch)
{
AddMissedMessages();
Interlocked.Decrement(ref fShared.fReceive);
tcs.StandardCompletion.SetResult(msg);
}
int newReceive = Interlocked.Exchange(ref fShared.fReceive, fShared.fReceive);
if ((newReceive > 0) && (oldReceive != newReceive))
{
AddMissedMessages();
}
Interlocked.Exchange(ref fShared.fInTask, 0);
#if DEBUG_MSG
if (Interlocked.CompareExchange(ref fShared.fMessCount, 0, 0) != 0)
#else
if (!fMailBox.IsEmpty)
#endif
{
TrySetInTask();
}
}
