Added short sleep between calls to enter_toi().

include/wsrep/chrono.hpp

@@ -24,7 +24,7 @@
  */
 
 #ifndef WSREP_CHRONO_HPP
-#define WSREP_CHORNO_HPP
+#define WSREP_CHRONO_HPP
 
 #include <chrono>
 

include/wsrep/client_state.hpp

@@ -1008,6 +1008,15 @@ namespace wsrep
                             enum wsrep::provider::status status =
                             wsrep::provider::success);
 
+        // Poll provider::enter_toi() until return status from provider
+        // does not indicate certification failure, timeout expires
+        // or client is interrupted.
+        enum wsrep::provider::status
+        poll_enter_toi(wsrep::unique_lock<wsrep::mutex>& lock,
+                       const wsrep::key_array& keys,
+                       const wsrep::const_buffer& buffer,
+                       int flags,
+                       std::chrono::time_point<wsrep::clock> wait_until);
         void enter_toi_common(wsrep::unique_lock<wsrep::mutex>&);
         void leave_toi_common();