private void Requesting(long sentRequestClock)
{
int receivedAcks = 0;
T updatedInternals = Internals;
long updatedSyncEntryNum = _syncEntryNumber;
while (receivedAcks < Communicator.ProcessesCount - 1)
{
while (Communicator.ProbeMessage(Tags.ACK_TAG))
{
MonitorMessage <T> received = Communicator
.ReceiveMessage <MonitorMessage <T> >(Tags.ACK_TAG);
if (received.LastCsEntrySyncNumber > updatedSyncEntryNum)
{
//synchronizing current internal state to fresher critical section output
updatedInternals = received.InternalState;
updatedSyncEntryNum = received.LastCsEntrySyncNumber;
}
receivedAcks++;
}
if (Communicator.ProbeMessage(Tags.PRIORITY_REQ_TAG))
{
MonitorMessage <T> received = Communicator
.ReceiveMessage <MonitorMessage <T> >(Tags.PRIORITY_REQ_TAG);
ReplyAck(received);
}
if (Communicator.ProbeMessage(Tags.REQ_TAG))
{
MonitorMessage <T> received = Communicator
.ReceiveMessage <MonitorMessage <T> >(Tags.REQ_TAG);
if (IsPriorREQ(received, sentRequestClock))
{
ReplyAck(received);
}
else
{
_deferredMessages.Add(received);
}
}
Logger.LogRequestingWithReceivedAcks(Communicator.MyRank, receivedAcks, Communicator.Clock);
}
_syncEntryNumber = updatedSyncEntryNum;
Internals = updatedInternals;
}
private void Waiting()
{
while (!Communicator.ProbeMessage(Tags.WAKE_TAG))
{
if (Communicator.ProbeMessage(Tags.PRIORITY_REQ_TAG) && !Communicator.ProbeMessage(Tags.WAKE_TAG))
{
MonitorMessage <T> received = Communicator
.ReceiveMessage <MonitorMessage <T> >(Tags.PRIORITY_REQ_TAG);
ReplyAck(received);
}
if (Communicator.ProbeMessage(Tags.REQ_TAG) && !Communicator.ProbeMessage(Tags.WAKE_TAG))
{
MonitorMessage <T> receivedReq = Communicator.ReceiveMessage <MonitorMessage <T> >(Tags.REQ_TAG);
ReplyAck(receivedReq);
}
}
MonitorMessage <T> awakeningMsg = Communicator.ReceiveMessage <MonitorMessage <T> >(Tags.WAKE_TAG);
_syncEntryNumber = awakeningMsg.LastCsEntrySyncNumber;
Internals = awakeningMsg.InternalState;
}
public void Communicate(long millisTimeout)
{
long startTime = DateTime.Now.Ticks;
long elapsedTime = DateTime.Now.Ticks - startTime;
while (elapsedTime < millisTimeout)
{
if (Communicator.ProbeMessage(Tags.PRIORITY_REQ_TAG))
{
MonitorMessage <T> received = Communicator
.ReceiveMessage <MonitorMessage <T> >(Tags.PRIORITY_REQ_TAG);
ReplyAck(received);
}
if (Communicator.ProbeMessage(Tags.REQ_TAG))
{
MonitorMessage <T> receivedReq = Communicator.ReceiveMessage <MonitorMessage <T> >(Tags.REQ_TAG);
ReplyAck(receivedReq);
}
elapsedTime = DateTime.Now.Ticks - startTime;
//Console.WriteLine($"#{Communicator.MyRank} communicates, elapsed: {elapsedTime}");
}
}
private void ReplyAck(MonitorMessage <T> msg)
{
var reply = BuildCurrentMonitorMessage();
Communicator.Send(reply, msg.SenderRank, Tags.ACK_TAG);
}
private bool IsPriorREQ(MonitorMessage <T> requestMsg, long comparedClockVal)
{
return(requestMsg.Clock < comparedClockVal || requestMsg.Clock == comparedClockVal &&
requestMsg.SenderRank < Communicator.MyRank);
}
