From 196e93a387dea47ab8a3ad600b90446e98840a54 Mon Sep 17 00:00:00 2001
From: michael-west <michael.west@ettus.com>
Date: Thu, 14 Jul 2016 17:57:15 -0700
Subject: Add thread safety to gps_ctrl cached sensors

---
 host/lib/usrp/gps_ctrl.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'host')

diff --git a/host/lib/usrp/gps_ctrl.cpp b/host/lib/usrp/gps_ctrl.cpp
index 207ef10ab..32ed80dc3 100644
--- a/host/lib/usrp/gps_ctrl.cpp
+++ b/host/lib/usrp/gps_ctrl.cpp
@@ -28,6 +28,7 @@
 #include <boost/tokenizer.hpp>
 #include <boost/format.hpp>
 #include <boost/regex.hpp>
+#include <boost/thread/mutex.hpp>
 
 #include "boost/tuple/tuple.hpp"
 #include "boost/foreach.hpp"
@@ -49,8 +50,10 @@ gps_ctrl::~gps_ctrl(void){
 class gps_ctrl_impl : public gps_ctrl{
 private:
   std::map<std::string, boost::tuple<std::string, boost::system_time, bool> > sensors;
+    boost::mutex cache_mutex;
 
   std::string get_cached_sensor(const std::string sensor, const int freshness, const bool once, const bool touch=true) {
+    boost::mutex::scoped_lock lock(cache_mutex);
     boost::system_time time = boost::get_system_time();
     try {
       // this is nasty ...
-- 
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