void Daemon::grouped( Channel channel ) {
NOTE();
OutputMessage response( MessageType::Control );
if ( _state != State::FormingGroup ) {
response.tag( Code::Refuse );
channel->send( response );
return;
}
Channel top, bottom;
std::tie( top, bottom ) = Communicator::socketPair();
response.tag( Code::OK );
channel->send( response );
int pid = ::fork();
if ( pid == -1 )
throw brick::net::SystemException( "fork" );
if ( pid == 0 )
becomeChild( std::move( bottom ) );
else {
_childPid = pid;
becomeParent( std::move( top ) );
}
}
void OptimisticTickSyncAlgo::timeStepStart(TIME currentTime)
{
#ifdef PROFILE
if(!busywait)
syncStart();
#endif
if(currentTime < grantedTime){
if(this->isChild && comm!=NULL)
comm->failTime=currentTime;
return;
}
#if DEBUG_WITH_PROFILE
CERR << "Start sync time step " << currentTime << " " << getCurTimeInMs() << endl;
#elif DEBUG
CERR << "Start sync time step " << currentTime << endl;
#endif
if(this->isChild){
//speculation worked so we kill the parent
this->interface->waitforAll();
pid_t tempparId=this->parentPid;
//try to send a kill signal
comm->action=ACTION_SUCCESS;
//detach from shm so parent can clean it.
detachTimeShm();
becomeParent();
this->specFailTime=Infinity;
#if DEBUG
CERR << "I'm child my pid:" << this->mypid << "; killing parent " << tempparId << endl;
#endif
cout << "Success" << endl;
//create new shared memory
createTimeShm();
st->speculationSuceeded(currentTime);
}
else{
//cout << "I'm parent waiting for others!!" << endl;
this->interface->waitforAll();
}
}
