Add missing isConnected override to uv transport (#381)

Summary:
Project does not build with -DUSE_LIBUV=ON , due to the introduction of virtual isConnected() in base Pair class. This patch fixes it.

Pull Request resolved: #381

Reviewed By: DanilBaibak

Differential Revision: D53003428

Pulled By: malfet

fbshipit-source-id: a406a6fce10d202f06bc2c2ca5f066d6befaf292

Author: dsciebu

gloo/transport/uv/pair.cc

@@ -52,6 +52,11 @@ const Address& Pair::address() const {
   return addr_;
 }
 
+bool Pair::isConnected() {
+  std::lock_guard<std::mutex> lock(mutex_);
+  return state_ == CONNECTED;
+}
+
 void Pair::connect(const std::vector<char>& bytes) {
   const auto peer = Address(bytes);
 

gloo/transport/uv/pair.h

@@ -150,6 +150,8 @@ class Pair : public ::gloo::transport::Pair {
 
   void close() override;
 
+  bool isConnected() override;
+
  private:
   std::mutex mutex_;
   std::condition_variable cv_;