bool
TCPPort::OnSocketEvent(SocketDescriptor _socket, unsigned mask)
{
assert(listener.IsDefined());
if (_socket == listener) {
/* connection should never be defined here */
assert(SocketPort::GetState() == PortState::FAILED);
SocketDescriptor s = listener.Accept();
if (!s.IsDefined())
return true;
#ifndef HAVE_POSIX
/* reset the flag so we can wait for it atomically after
SocketPort::Set() */
closed_trigger.Reset();
#endif
SocketPort::Set(std::move(s));
#ifdef HAVE_POSIX
/* disable the listener socket while the connection socket is
active */
return false;
#else
/* for until the connection SocketThread finishes the connection;
meanwhile, incoming connections are ignored */
closed_trigger.Wait();
SocketPort::Close();
/* now continue listening for incoming connections */
return true;
#endif
} else {
/* this event affects the connection socket */
if (!SocketPort::OnSocketEvent(_socket, mask)) {
/* the connection was closed; continue listening on incoming
connections */
#ifdef HAVE_POSIX
/* close the connection, unregister the event, and reinstate the
listener socket */
SocketPort::Close();
io_thread->Add(listener.ToFileDescriptor(), Poll::READ, *this);
#else
/* we must not call SocketPort::Close() here because it may
deadlock, waiting forever for this thread to finish; instead,
wake up the listener thread, and let it handle the event */
closed_trigger.Signal();
#endif
return false;
} else
/* continue reading from the connection */
return true;
}
}
gcc_pure
bool IsConnected() const {
// TODO: what if the socket is broken?
return fd.IsDefined();
}
bool IsDefined() const {
return socket.IsDefined();
}
