Merge pull request #4378

ac934663 rpc: add a "is an update available" flag in get_info (moneromooo-monero)

src/cryptonote_core/cryptonote_core.h

@@ -738,6 +738,16 @@ namespace cryptonote
       */     
      network_type get_nettype() const { return m_nettype; };
 
+     /**
+      * @brief check whether an update is known to be available or not
+      *
+      * This does not actually trigger a check, but returns the result
+      * of the last check
+      *
+      * @return whether an update is known to be available or not
+      */
+     bool is_update_available() const { return m_update_available; }
+
      /**
       * @brief get whether fluffy blocks are enabled
       *
@@ -966,6 +976,8 @@ namespace cryptonote
 
      network_type m_nettype; //!< which network are we on?
 
+     std::atomic<bool> m_update_available;
+
      std::string m_checkpoints_path; //!< path to json checkpoints file
      time_t m_last_dns_checkpoints_update; //!< time when dns checkpoints were last updated
      time_t m_last_json_checkpoints_update; //!< time when json checkpoints were last updated