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Try to fix lock condition in server

merge-requests/9/head
Phil Taylor 2022-01-07 14:42:32 +00:00
rodzic db702123f9
commit 82b655cc09
1 zmienionych plików z 35 dodań i 37 usunięć
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72
udpserver.cpp
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@ -1573,56 +1573,53 @@ void udpServer::sendRetransmitRequest(CLIENT* c)
// We have at least 1 missing packet!
qDebug(logUdp()) << "Missing Seq: size=" << c->rxSeqBuf.size() << "firstKey=" << c->rxSeqBuf.firstKey() << "lastKey=" << c->rxSeqBuf.lastKey() << "missing=" << c->rxSeqBuf.lastKey() - c->rxSeqBuf.firstKey() - c->rxSeqBuf.size() + 1;
// We are missing packets so iterate through the buffer and add the missing ones to missing packet list
for (int i = 0; i < c->rxSeqBuf.keys().length() - 1; i++) {
for (quint16 j = c->rxSeqBuf.keys()[i] + 1; j < c->rxSeqBuf.keys()[i + 1]; j++) {
auto s = c->rxMissing.find(j);
if (s == c->rxMissing.end())
{
// We haven't seen this missing packet before
qDebug(logUdp()) << this->metaObject()->className() << ": Adding to missing buffer (len=" << c->rxMissing.size() << "): " << j;
if (c->missMutex.try_lock_for(std::chrono::milliseconds(LOCK_PERIOD)))
if (c->rxMutex.try_lock_for(std::chrono::milliseconds(LOCK_PERIOD)))
{
for (int i = 0; i < c->rxSeqBuf.keys().length() - 1; i++) {
for (quint16 j = c->rxSeqBuf.keys()[i] + 1; j < c->rxSeqBuf.keys()[i + 1]; j++) {
auto s = c->rxMissing.find(j);
if (s == c->rxMissing.end())
{
c->rxMissing.insert(j, 0);
c->missMutex.unlock();
}
else {
qInfo(logUdpServer()) << "Unable to lock missMutex()";
}
if (c->rxMutex.try_lock_for(std::chrono::milliseconds(LOCK_PERIOD)))
{
if (c->rxSeqBuf.size() > 400)
{
c->rxSeqBuf.remove(0);
}
c->rxSeqBuf.insert(j, QTime::currentTime()); // Add this missing packet to the rxbuffer as we now long about it.
c->rxMutex.unlock();
}
else {
qInfo(logUdpServer()) << "Unable to lock rxMutex()";
}
}
else {
if (s.value() == 4)
{
// We have tried 4 times to request this packet, time to give up!
// We haven't seen this missing packet before
qDebug(logUdp()) << this->metaObject()->className() << ": Adding to missing buffer (len=" << c->rxMissing.size() << "): " << j;
if (c->missMutex.try_lock_for(std::chrono::milliseconds(LOCK_PERIOD)))
{
s = c->rxMissing.erase(s);
c->rxMissing.insert(j, 0);
c->missMutex.unlock();
}
else {
qInfo(logUdpServer()) << "Unable to lock missMutex()";
}
if (c->rxSeqBuf.size() > 400)
{
c->rxSeqBuf.remove(0);
c->rxSeqBuf.insert(j, QTime::currentTime()); // Add this missing packet to the rxbuffer as we now long about it.
}
}
else {
if (s.value() == 4)
{
// We have tried 4 times to request this packet, time to give up!
if (c->missMutex.try_lock_for(std::chrono::milliseconds(LOCK_PERIOD)))
{
s = c->rxMissing.erase(s);
c->missMutex.unlock();
}
else {
qInfo(logUdpServer()) << "Unable to lock missMutex()";
}
}
}
}
}
c->rxMutex.unlock();
}
else {
qInfo(logUdpServer()) << "Unable to lock rxMutex()";
}
}
}
@ -1667,9 +1664,10 @@ void udpServer::sendRetransmitRequest(CLIENT* c)
{
qDebug(logUdp()) << this->metaObject()->className() << ": sending request for multiple missing packets : " << missingSeqs.toHex();
missingSeqs.insert(0, p.packet, sizeof(p.packet));
if (udpMutex.try_lock_for(std::chrono::milliseconds(LOCK_PERIOD)))
{
missingSeqs.insert(0, p.packet, sizeof(p.packet));
c->socket->writeDatagram(missingSeqs, c->ipAddress, c->port);
udpMutex.unlock();
}