From 11f11de41c3a83e1e9548f5f024d36755019a1fa Mon Sep 17 00:00:00 2001
From: Bruce Marriner <bruce@sqls.net>
Date: Fri, 17 Jun 2016 14:23:19 -0500
Subject: [PATCH] Protect writes to DataReady with mutex lock

---
 wsapi.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/wsapi.go b/wsapi.go
index ef518a8..6917bf7 100644
--- a/wsapi.go
+++ b/wsapi.go
@@ -194,10 +194,14 @@ func (s *Session) heartbeat(wsConn *websocket.Conn, listening <-chan interface{}
 		s.wsMutex.Unlock()
 		if err != nil {
 			s.log(LogError, "error sending heartbeat to gateway %s, %s", s.gateway, err)
+			s.Lock()
 			s.DataReady = false
+			s.Unlock()
 			return
 		}
+		s.Lock()
 		s.DataReady = true
+		s.Unlock()
 
 		select {
 		case <-ticker.C: