/* the function called by each thread is "mainLoop" */
void*
mainLoop(void* arg)
{
loopArg *loopA = (loopArg*)arg;
istream* testSStream = loopA->inpt;
ostream* pstatStream = loopA->outpt;
int id = loopA->id;
double log600 = log2(600.0);
PrintStack printStack;
for( ; ; )
{
InputTree correct;
InputTree* cuse;
/* first lock to read in the material */
pthread_mutex_lock(&readlock);
if( !*testSStream ) {
pthread_mutex_unlock(&readlock);
break;
}
*testSStream >> correct;
if( !*testSStream ){
pthread_mutex_unlock(&readlock);
break;
}
totWords += correct.length()+1;
int locCount = sentenceCount++;
list<ECString> wtList;
correct.make(wtList);
SentRep sr( wtList ); // used in precision calc
ExtPos extPos;
if(params.extPosIfstream)
extPos.read(params.extPosIfstream,sr);
pthread_mutex_unlock(&readlock);
cuse = &correct;
int len = correct.length();
if(len > params.maxSentLen) continue;
//cerr << "Len = " << len << endl;
/*
if( !params.field().in(sentenceCount) )
{
sentenceCount++;
continue;
}
if(sentenceCount < -1)
{
sentenceCount++;
continue;
}
sentenceCount++;
*/
vector<ECString> poslist;
correct.makePosList(poslist);
ScoreTree sc;
sc.setEquivInts(poslist);
MeChart* chart = new MeChart( sr,extPos,id );
chart->parse( );
Item* topS = chart->topS();
if(!topS)
{
cerr << "Parse failed" << endl;
cerr << correct << endl;
error(" could not parse ");
delete chart;
continue;
}
// compute the outside probabilities on the items so that we can
// skip doing detailed computations on the really bad ones
chart->set_Alphas();
Bst& bst = chart->findMapParse();
if( bst.empty()) error( "mapProbs did not return answer");
float bestF = -1;
int i;
int numVersions = 0;
Link diffs(0);
//cerr << "Need num diff: " << Bchart::Nth << endl;
printStruct printS;
printS.sentenceCount = locCount;
printS.numDiff = 0;
for(numVersions = 0 ; ; numVersions++)
{
short pos = 0;
Val* val = bst.next(numVersions);
if(!val)
{
//cerr << "Breaking" << endl;
break;
}
InputTree* mapparse = inputTreeFromBsts(val,pos,sr);
bool isU;
int dummy = 0;
diffs.is_unique(mapparse, isU, dummy);
// cerr << "V " << isU << " " << numVersions << *mapparse << endl;
if(isU)
{
printS.probs.push_back(val->prob());
printS.trees.push_back(mapparse);
printS.numDiff++;
}
else
{
delete mapparse;
}
if(printS.numDiff >= Bchart::Nth) break;
if(numVersions > 20000) break;
}
ParseStats* locPst = new ParseStats[Bchart::Nth];
ParseStats bestPs;
for(i = 0 ; i <printS.numDiff ; i++)
{
InputTree *mapparse = printS.trees[i];
assert(mapparse);
sc.trips.clear();
ParseStats pSt;
sc.recordGold(cuse,pSt);
sc.precisionRecall(mapparse,pSt);
float newF = pSt.fMeasure();
cerr << printS.sentenceCount << "\t" << newF << endl;
if(newF > bestF)
{
bestF = newF;
bestPs = pSt;
}
if(histPoints[i])
{
locPst[i] += bestPs;
}
}
if(printS.numDiff < Bchart::Nth)
{
for(i = printS.numDiff ; i < Bchart::Nth ; i++)
{
if(histPoints[i]) locPst[i] += bestPs;
}
}
pthread_mutex_lock(&scorelock);
for(i = 0 ; i < Bchart::Nth ; i++) totPst[i]+=locPst[i];
pthread_mutex_unlock(&scorelock);
int numPrinted;
/* put the sentence with which we just finished at the end of the printStack*/
printStack.push_back(printS);
PrintStack::iterator psi = printStack.begin();
/* now look at each item from the front of the print stack
to see if it should be printed now */
pthread_mutex_lock(&writelock);
for( numPrinted =0; psi != printStack.end(); numPrinted++ )
{
printStruct& pstr=(*psi);
if(pstr.sentenceCount != printCount) break;
*pstatStream << pstr.sentenceCount << "\t" << pstr.numDiff << "\n";
printCount++;
for(i = 0 ; i < pstr.numDiff ; i++)
{
InputTree* mapparse = pstr.trees[i];
assert(mapparse);
double logP =log2(pstr.probs[i]);
logP -= (sr.length()*log600);
*pstatStream << logP << "\n";
if(Bchart::prettyPrint) *pstatStream << *mapparse << "\n\n";
else
{
mapparse->printproper(*pstatStream);
*pstatStream << "\n";
}
delete mapparse;
}
*pstatStream << endl;
psi++;
}
pthread_mutex_unlock(&writelock);
for(i = 0 ; i < numPrinted ; i++) printStack.pop_front();
if(Feature::isLM)
{
double lgram = log2(bst.sum());
lgram -= (sr.length()*log600);
double pgram = pow(2,lgram);
double iptri = chart->triGram();;
double ltri = (log2(iptri)-sr.length()*log600);
double ptri = pow(2.0,ltri);
double pcomb1 = (0.667 * pgram)+(0.333 * ptri);
double lcom1 = log2(pcomb1);
totGram -= lgram;
totTri -= ltri;
totMix -= lcom1;
if(locCount%10 == 9)
{
cerr << locCount << "\t";
cerr << pow(2.0,totGram/(double)totWords);
cerr <<"\t" << pow(2.0,totTri/(double)totWords);
cerr << "\t" << pow(2.0,totMix/(double)(totWords));
cerr << endl;
}
}
if(locCount%50 == 1)
{
cerr << sentenceCount << "\t";
for(int i = 0 ; i < Bchart::Nth ; i++)
if(histPoints[i])
{
cerr << i << " " << totPst[i].fMeasure() << "\t";
}
cerr << endl;
}
delete chart;
delete [] locPst;
}
return 0;
}
