bool MessageEndpoint::PushMessage(Message *message)
{
uint32_t ourSerial;
bool isNewCallback = false;
if(message == NULL)
{
return false;
}
{
Lock shutdownLock(&m_isShutdownMutex);
if(m_isShutDown)
{
message->DeleteContents();
delete message;
return false;
}
}
//The other endpoint must always provide a valid "our" serial number, ignore if they don't
if(message->m_ourSerialNumber == 0)
{
message->DeleteContents();
delete message;
return false;
}
//If this is a new conversation from the endpoint (new callback conversation)
if(message->m_theirSerialNumber == 0)
{
isNewCallback = true;
//Look up to see if there's a MessageQueue for this serial
MessageQueue *queue = m_queues.GetByTheirSerial(message->m_ourSerialNumber);
//If this is a brand new callback message
if(queue == NULL)
{
ourSerial = GetNextOurSerialNum();
m_queues.AddQueue(ourSerial, message->m_ourSerialNumber);
queue = m_queues.GetByOurSerial(ourSerial);
//It's possible to have a race condition that would delete this MessageQueue before we could access it
if(queue == NULL)
{
message->DeleteContents();
delete message;
return false;
}
}
if(queue->PushMessage(message))
{
if(isNewCallback)
{
{
Lock lock(&m_availableCBsMutex);
m_availableCBs.push(ourSerial);
}
pthread_cond_signal(&m_callbackWakeupCondition);
}
return true;
}
else
{
return false;
}
}
//If we got here, the message should be for an existing conversation
// (IE: Both serials should be valid)
MessageQueue *queue = m_queues.GetByOurSerial(message->m_theirSerialNumber);
if(queue == NULL)
{
//If there wasn't a MessageQueue for this serial number, then this message must be late or in error
message->DeleteContents();
delete message;
return false;
}
//Update the MessageQueue to have the received "their" serial. It might not have it yet.
m_queues.AddQueue(message->m_theirSerialNumber, message->m_ourSerialNumber);
return queue->PushMessage(message);
}
