From dc73f9df159e389131bb095d2b4d22df8642095f Mon Sep 17 00:00:00 2001
From: Martin Braun <martin.braun@ettus.com>
Date: Mon, 16 Apr 2018 11:00:53 -0700
Subject: gps_ctrl: Replace boost::this_thread::sleep()

Use std::this_thread::sleep_for() instead.
---
 host/lib/usrp/gps_ctrl.cpp | 58 +++++++++++++++++++++++++---------------------
 1 file changed, 32 insertions(+), 26 deletions(-)

diff --git a/host/lib/usrp/gps_ctrl.cpp b/host/lib/usrp/gps_ctrl.cpp
index bca62204c..a50261851 100644
--- a/host/lib/usrp/gps_ctrl.cpp
+++ b/host/lib/usrp/gps_ctrl.cpp
@@ -18,17 +18,27 @@
 #include <boost/format.hpp>
 #include <boost/regex.hpp>
 #include <boost/thread/mutex.hpp>
+#include <boost/date_time.hpp>
+#include <boost/tuple/tuple.hpp>
 #include <ctime>
 #include <string>
-#include <boost/date_time.hpp>
-
-#include "boost/tuple/tuple.hpp"
+#include <thread>
+#include <chrono>
 
 using namespace uhd;
 using namespace boost::posix_time;
 using namespace boost::algorithm;
 using namespace boost::this_thread;
 
+namespace {
+    constexpr int GPS_COMM_TIMEOUT_MS       = 1300;
+    constexpr int GPS_NMEA_NORMAL_FRESHNESS = 1000;
+    constexpr int GPS_SERVO_FRESHNESS       = 1000;
+    constexpr int GPS_LOCK_FRESHNESS        = 2500;
+    constexpr int GPS_TIMEOUT_DELAY_MS      = 200;
+    constexpr int GPSDO_COMMAND_DELAY_MS    = 200;
+}
+
 /*!
  * A control for GPSDO devices
  */
@@ -90,7 +100,7 @@ private:
                 break;
             }
 
-            sleep(boost::posix_time::milliseconds(1));
+            std::this_thread::sleep_for(std::chrono::milliseconds(1));
             now = boost::get_system_time();
         }
 
@@ -293,22 +303,24 @@ public:
 
 private:
   void init_gpsdo(void) {
-    //issue some setup stuff so it spits out the appropriate data
-    //none of these should issue replies so we don't bother looking for them
-    //we have to sleep between commands because the JL device, despite not acking, takes considerable time to process each command.
-     sleep(milliseconds(GPSDO_COMMAND_DELAY_MS));
-    _send("SYST:COMM:SER:ECHO OFF\r\n");
-     sleep(milliseconds(GPSDO_COMMAND_DELAY_MS));
-    _send("SYST:COMM:SER:PRO OFF\r\n");
-     sleep(milliseconds(GPSDO_COMMAND_DELAY_MS));
-    _send("GPS:GPGGA 1\r\n");
-     sleep(milliseconds(GPSDO_COMMAND_DELAY_MS));
-    _send("GPS:GGAST 0\r\n");
-     sleep(milliseconds(GPSDO_COMMAND_DELAY_MS));
-    _send("GPS:GPRMC 1\r\n");
-     sleep(milliseconds(GPSDO_COMMAND_DELAY_MS));
-    _send("SERV:TRAC 1\r\n");
-     sleep(milliseconds(GPSDO_COMMAND_DELAY_MS));
+      //issue some setup stuff so it spits out the appropriate data
+      //none of these should issue replies so we don't bother looking for them
+      //we have to sleep between commands because the JL device, despite not
+      //acking, takes considerable time to process each command.
+      const std::vector<std::string> init_cmds = {
+          "SYST:COMM:SER:ECHO OFF\r\n",
+          "SYST:COMM:SER:PRO OFF\r\n",
+          "GPS:GPGGA 1\r\n",
+          "GPS:GGAST 0\r\n",
+          "GPS:GPRMC 1\r\n",
+          "SERV:TRAC 1\r\n"
+      };
+
+      for (const auto& cmd : init_cmds) {
+          _send(cmd);
+          std::this_thread::sleep_for(
+                std::chrono::milliseconds(GPSDO_COMMAND_DELAY_MS));
+      }
   }
 
   //helper function to retrieve a field from an NMEA sentence
@@ -408,12 +420,6 @@ private:
     GPS_TYPE_NONE
   } _gps_type;
 
-  static const int GPS_COMM_TIMEOUT_MS = 1300;
-  static const int GPS_NMEA_NORMAL_FRESHNESS = 1000;
-  static const int GPS_SERVO_FRESHNESS = 1000;
-  static const int GPS_LOCK_FRESHNESS = 2500;
-  static const int GPS_TIMEOUT_DELAY_MS = 200;
-  static const int GPSDO_COMMAND_DELAY_MS = 200;
 };
 
 /***********************************************************************
-- 
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