Exit the poller when it handles no connection at all

src/network/poller.cpp

@@ -89,9 +89,11 @@ void Poller::stop_watching_send_events(const SocketHandler* const socket_handler
   throw std::runtime_error("Cannot watch a non-registered socket for send events");
 }
 
-void Poller::poll()
+bool Poller::poll()
 {
 #if POLLER == POLL
+  if (this->nfds == 0)
+    return false;
   int res = ::poll(this->fds, this->nfds, -1);
   if (res < 0)
     {
@@ -119,4 +121,5 @@ void Poller::poll()
         }
     }
 #endif
+  return true;
 }

src/network/poller.hpp

@@ -57,8 +57,9 @@ public:
   /**
    * Wait for all watched events, and call the SocketHandlers' callbacks
    * when one is ready.
+   * Returns false if there are 0 SocketHandler in the list.
    */
-  void poll();
+  bool poll();
 
 private:
   /**

src/network/socket_handler.cpp

@@ -66,7 +66,10 @@ void SocketHandler::on_recv()
 
   ssize_t size = ::recv(this->socket, buf, 4096, 0);
   if (0 == size)
-    this->on_connection_close();
+    {
+      this->on_connection_close();
+      this->close();
+    }
   else if (-1 == static_cast<ssize_t>(size))
     throw std::runtime_error("Error reading from socket");
   else