From 743e66a3469af27819bcd0e3e1694d2a4c523c6b Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Sat, 5 Mar 2016 23:44:31 +0100
Subject: Use std::chrono in ClockTAI

---
 src/ClockTAI.cpp | 23 ++++-------------------
 src/ClockTAI.h   |  7 ++++---
 2 files changed, 8 insertions(+), 22 deletions(-)

diff --git a/src/ClockTAI.cpp b/src/ClockTAI.cpp
index c7b045b..5334bbd 100644
--- a/src/ClockTAI.cpp
+++ b/src/ClockTAI.cpp
@@ -52,22 +52,14 @@
 ClockTAI::ClockTAI()
 {
     m_offset = 0;
-    m_bulletin_download_time.tv_nsec = 0;
-    m_bulletin_download_time.tv_sec = 0;
 }
 
 int ClockTAI::get_offset()
 {
-#if ENABLE_OUTPUT_EDI
-    struct timespec time_now;
+    auto time_now = std::chrono::system_clock::now();
 
-    int err = clock_gettime(CLOCK_REALTIME, &time_now);
-    if (err) {
-        throw std::runtime_error("ClockTAI::get_offset() clock_gettime failed");
-    }
-
-    if (time_now.tv_sec - m_bulletin_download_time.tv_sec >
-            3600 * 24 * 31) {
+    if (time_now - m_bulletin_download_time >
+            std::chrono::seconds(3600 * 24 * 31)) {
         // Refresh if it's older than one month. Leap seconds are
         // announced several months in advance
 
@@ -84,7 +76,6 @@ int ClockTAI::get_offset()
         etiLog.level(info) << "Updated TAI-UTC offset to " << m_offset << "s.";
     }
 
-#endif // ENABLE_OUTPUT_EDI
     return m_offset;
 }
 
@@ -183,11 +174,7 @@ int ClockTAI::download_tai_utc_bulletin(const char* url)
         }
         else {
             // Save the download time of the bulletin
-            int err = clock_gettime(CLOCK_REALTIME, &m_bulletin_download_time);
-            if (err) {
-                perror("REALTIME clock_gettime failed");
-                r = 1;
-            }
+            m_bulletin_download_time = std::chrono::system_clock::now();
         }
 
         /* always cleanup */
@@ -230,5 +217,3 @@ void debug_tai_clk()
 }
 #endif
 
-
-
diff --git a/src/ClockTAI.h b/src/ClockTAI.h
index 027e6db..499fa56 100644
--- a/src/ClockTAI.h
+++ b/src/ClockTAI.h
@@ -37,9 +37,10 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <sstream>
-#include <time.h>
+#include <chrono>
 
-// EDI needs to know UTC-TAI, but doesn't need the CLOCK_TAI to be set
+// EDI needs to know UTC-TAI, but doesn't need the CLOCK_TAI to be set.
+// We can keep this code, maybe for future use
 #define SUPPORT_SETTING_CLOCK_TAI 0
 
 /* Loads, parses and represents TAI-UTC offset information from the USNO bulletin */
@@ -65,7 +66,7 @@ class ClockTAI {
 
         int m_offset;
         std::stringstream m_bulletin;
-        struct timespec m_bulletin_download_time;
+        std::chrono::system_clock::time_point m_bulletin_download_time;
 
         // Load bulletin into m_bulletin, return 0 on success
         int download_tai_utc_bulletin(const char* url);
-- 
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