void Server::checkAndDispatchEpoll(int epollMillis) {
constexpr int maxEvents = 256;
epoll_event events[maxEvents];
std::list<Connection*> toBeDeleted;
int numEvents = epoll_wait(_epollFd, events, maxEvents, epollMillis);
if (numEvents == -1) {
if (errno != EINTR) {
LS_ERROR(_logger, "Error from epoll_wait: " << getLastError());
}
return;
}
if (numEvents == maxEvents) {
static time_t lastWarnTime = 0;
time_t now = time(nullptr);
if (now - lastWarnTime >= 60) {
LS_WARNING(_logger, "Full event queue; may start starving connections. "
"Will warn at most once a minute");
lastWarnTime = now;
}
}
for (int i = 0; i < numEvents; ++i) {
if (events[i].data.ptr == this) {
if (events[i].events & ~EPOLLIN) {
LS_SEVERE(_logger, "Got unexpected event on listening socket ("
<< EventBits(events[i].events) << ") - terminating");
_terminate = true;
break;
}
handleAccept();
} else if (events[i].data.ptr == &_eventFd) {
if (events[i].events & ~EPOLLIN) {
LS_SEVERE(_logger, "Got unexpected event on management pipe ("
<< EventBits(events[i].events) << ") - terminating");
_terminate = true;
break;
}
handlePipe();
} else {
auto connection = reinterpret_cast<Connection*>(events[i].data.ptr);
if (handleConnectionEvents(connection, events[i].events) == Close) {
toBeDeleted.push_back(connection);
}
}
}
// The connections are all deleted at the end so we've processed any other subject's
// closes etc before we call onDisconnect().
for (auto it = toBeDeleted.begin(); it != toBeDeleted.end(); ++it) {
auto connection = *it;
if (_connections.find(connection) == _connections.end()) {
LS_SEVERE(_logger, "Attempt to delete connection we didn't know about: " << (void*)connection
<< formatAddress(connection->getRemoteAddress()));
_terminate = true;
break;
}
LS_DEBUG(_logger, "Deleting connection: " << formatAddress(connection->getRemoteAddress()));
delete connection;
}
}
/*JSON{
"type" : "idle",
"generate" : "jswrap_pipe_idle",
"ifndef" : "SAVE_ON_FLASH"
}*/
bool jswrap_pipe_idle() {
bool wasBusy = false;
JsVar *arr = pipeGetArray(false);
if (arr) {
JsvObjectIterator it;
jsvObjectIteratorNew(&it, arr);
while (jsvObjectIteratorHasValue(&it)) {
JsVar *pipe = jsvObjectIteratorGetValue(&it);
wasBusy |= handlePipe(arr, &it, pipe);
jsvUnLock(pipe);
jsvObjectIteratorNext(&it);
}
jsvObjectIteratorFree(&it);
jsvUnLock(arr);
}
return wasBusy;
}
