Method mmCheckNewActivity

Control/L3MMLayer.cpp:143–175

See if there are any new transactions to start. If all transactions are gone, initiate a channel release. Return true if anything happened.

// If all transactions are gone, initiate a channel release.
// Return true if anything happened.
bool MMContext::mmCheckNewActivity()
{
	// If there is a mobility management procedure in progress then we wont start anything else until it is finished.
	// We shouldnt need to lock gMMLock yet because the MMContext cannot be deleted while in the thread that called us,
	// and mmcServiceRequests is a thread safe queue.
	if (! mmInMobilityManagement()) {
		if (const L3Message *l3msg = mmcServiceRequests.readNoBlock()) {
			const L3CMServiceRequest *cmmsg = dynamic_cast<typeof(cmmsg)>(l3msg);
			NewCMServiceResponder(cmmsg,this);
			delete cmmsg;
			return true;
		}
		// We are refererencing the MMUser so we cannot let that change and the only
		// completely safe way to do that is to lock the entire MMLayer.
		// The unlock() corresponding to this lock() may be in mmuServiceMTQueues.
		gMMLock.lock(__FILE__,__LINE__);
		if (mmcMMU) {
			if (mmcMMU->mmuServiceMTQueues()) { return true; }
		}
		gMMLock.unlock();
	}
	// If there are no transactions, kill the channel.
	// TODO: A new SIP transaction could creep in here between the time
	// we check isEmpty and when the channel actually closes.
	// What to do about that?
	// When we detach the MMUser, if it has anything on it, just leave it there,
	// and paging will restart.
	if (mmIsEmpty()) {
		mmcChan->chanClose(L3RRCause::NormalEvent,RELEASE);
		return true;	// This is new activity - the calling loop should skip back to the top
	}
	return false;
}

// What a stupid language.
MMUser::MMUser(string& wImsi)