From 2ff7de3fa2f1abb7b26c21b9645d5bf7c378911a Mon Sep 17 00:00:00 2001
From: David Heejong Park <hee.jong.park@dnv.com>
Date: Tue, 7 May 2024 18:36:27 +0200
Subject: [PATCH] Addressed comments - 02

---
 include/cosim/timer.hpp |  4 ++--
 src/cosim/timer.cpp     | 21 ++++++++++++++-------
 2 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/include/cosim/timer.hpp b/include/cosim/timer.hpp
index cb2ba0f3..5ae67c25 100644
--- a/include/cosim/timer.hpp
+++ b/include/cosim/timer.hpp
@@ -44,7 +44,7 @@ struct real_time_config
      *  When the value is greater than zero, the real time factor is computed periodically using the
      *  specified time instead of the `steps_to_monitor` value.
      */
-    std::atomic<std::chrono::milliseconds> sampling_period_to_monitor = std::chrono::milliseconds(-1);
+    std::atomic<int> sampling_period_to_monitor = -1;
 };
 
 } // namespace cosim
@@ -63,7 +63,7 @@ class hash<cosim::real_time_config>
         boost::hash_combine(seed, v.real_time_simulation.load());
         boost::hash_combine(seed, v.real_time_factor_target.load());
         boost::hash_combine(seed, v.steps_to_monitor.load());
-        boost::hash_combine(seed, v.sampling_period_to_monitor.load().count());
+        boost::hash_combine(seed, v.sampling_period_to_monitor.load());
         return seed;
     }
 };
diff --git a/src/cosim/timer.cpp b/src/cosim/timer.cpp
index 8a7b5ed7..99026229 100644
--- a/src/cosim/timer.cpp
+++ b/src/cosim/timer.cpp
@@ -37,8 +37,8 @@ class real_time_timer::impl
         if (newHash != configHashValue_) {
             start(currentTime);
             const auto sampling_period = config_->sampling_period_to_monitor.load();
-            if (sampling_period.count() > 0) {
-                sampling_period_to_monitor_ = sampling_period;
+            if (sampling_period > 0) {
+                sampling_period_to_monitor_ = std::chrono::milliseconds(sampling_period);
             } else {
                 sampling_period_to_monitor_ = std::nullopt;
             }
@@ -78,13 +78,16 @@ class real_time_timer::impl
     size_t configHashValue_;
     std::shared_ptr<real_time_metrics> metrics_;
     std::optional<std::chrono::milliseconds> sampling_period_to_monitor_ = std::nullopt;
+    const volatile bool tick_period_match_ = std::is_same<cosim::time_point::period, Time::time_point::period>::value;
 
     void update_rolling_average_real_time_factor(
         Time::time_point& currentTime,
         time_point& currentSimulationTime,
-        const duration& elapsedRealTime)
+        const cosim::duration& elapsedRealTime)
     {
-        const auto elapsedSimTime = std::chrono::duration_cast<duration>(currentSimulationTime - rtSimulationStartTime_);
+        const auto elapsedSimTime =
+            tick_period_match_ ? currentSimulationTime - rtSimulationStartTime_ : std::chrono::duration_cast<cosim::duration>(currentSimulationTime - rtSimulationStartTime_);
+
         metrics_->rolling_average_real_time_factor = elapsedSimTime.count() / (1.0 * elapsedRealTime.count());
         rtStartTime_ = currentTime;
         rtSimulationStartTime_ = currentSimulationTime;
@@ -93,12 +96,16 @@ class real_time_timer::impl
 
     void update_real_time_factor(Time::time_point currentTime, time_point currentSimulationTime)
     {
-        const auto relativeSimTime = std::chrono::duration_cast<duration>(currentSimulationTime - simulationStartTime_);
-        const auto relativeRealTime = std::chrono::duration_cast<duration>(currentTime - startTime_);
+        const auto relativeSimTime =
+            tick_period_match_ ? currentSimulationTime - simulationStartTime_ : std::chrono::duration_cast<cosim::duration>(currentSimulationTime - simulationStartTime_);
+        const auto relativeRealTime =
+            tick_period_match_ ? currentTime - startTime_ : std::chrono::duration_cast<cosim::duration>(currentTime - startTime_);
+
         metrics_->total_average_real_time_factor = relativeSimTime.count() / (1.0 * relativeRealTime.count());
 
         if (sampling_period_to_monitor_.has_value()) {
-            const auto elapsedRealTime = currentTime - rtStartTime_;
+            const auto elapsedRealTime =
+                tick_period_match_ ? currentTime - rtStartTime_ : std::chrono::duration_cast<cosim::duration>(currentTime - rtStartTime_);
 
             if (elapsedRealTime > sampling_period_to_monitor_.value()) {
                 update_rolling_average_real_time_factor(currentTime, currentSimulationTime, elapsedRealTime);