Use Stopwatch for measuring total time

src/storm/storm.cpp

@@ -4,6 +4,7 @@
 #include "storm/utility/macros.h"
 #include "storm/cli/cli.h"
 #include "storm/utility/initialize.h"
+#include "storm/utility/Stopwatch.h"
 
 #include "storm/settings/SettingsManager.h"
 #include "storm/settings/modules/ResourceSettings.h"
@@ -14,7 +15,7 @@
 int main(const int argc, const char** argv) {
 
     try {
-        auto start = std::chrono::high_resolution_clock::now();
+        storm::utility::Stopwatch totalTimer(true);
         storm::utility::setUp();
         storm::cli::printHeader("Storm", argc, argv);
         storm::settings::initializeAll("Storm", "storm");
@@ -28,10 +29,10 @@ int main(const int argc, const char** argv) {
         
         // All operations have now been performed, so we clean up everything and terminate.
         storm::utility::cleanUp();
-        auto end = std::chrono::high_resolution_clock::now();
+        totalTimer.stop();
 
         if (storm::settings::getModule<storm::settings::modules::ResourceSettings>().isPrintTimeAndMemorySet()) {
-            storm::cli::showTimeAndMemoryStatistics(std::chrono::duration_cast<std::chrono::milliseconds>(end - start).count());
+            storm::cli::showTimeAndMemoryStatistics(totalTimer.getTimeMilliseconds());
         }
         return 0;
     } catch (storm::exceptions::BaseException const& exception) {

src/storm/utility/Stopwatch.h

@@ -2,69 +2,116 @@
 #define STORM_UTILITY_STOPWATCH_H_
 
 #include <chrono>
-#include <math.h>
 
 #include "storm/utility/macros.h"
 
 namespace storm {
     namespace utility {
-        // A class that provides convenience operations to display run times.
+
+        /*!
+         * A class that provides convenience operations to display run times.
+         */
         class Stopwatch {
         public:
-            Stopwatch(double initialValueInSeconds = 0.0) : accumulatedSeconds(initialValueInSeconds), paused(false), startOfCurrentMeasurement(std::chrono::high_resolution_clock::now()) {
-                // Intentionally left empty
+
+            /*!
+             * Constructor.
+             *
+             * @param startNow If true, the stopwatch starts right away.
+             */
+            Stopwatch(bool startNow = false) : accumulatedTime(std::chrono::nanoseconds::zero()), stopped(true), startOfCurrentMeasurement(std::chrono::nanoseconds::zero()) {
+                if (startNow) {
+                    start();
+                }
             }
 
+            /*!
+             * Destructor.
+             */
             ~Stopwatch() = default;
 
-            double getAccumulatedSeconds() const {
-                if(paused) {
-                    return accumulatedSeconds;
-                } else {
-                    return accumulatedSeconds + std::chrono::duration<double>(std::chrono::high_resolution_clock::now() - startOfCurrentMeasurement).count();
+            /*!
+             * Get measured time in seconds.
+             *
+             * @return seconds as floating point number.
+             */
+            double getTimeSeconds() const {
+                return std::chrono::duration<float>(accumulatedTime).count();
+            }
+
+            /*!
+             * Get measured time in milliseconds.
+             *
+             * @return Milliseconds.
+             */
+            unsigned long long int getTimeMilliseconds() const {
+                return std::chrono::duration_cast<std::chrono::milliseconds>(accumulatedTime).count();
             }
+
+            /*!
+             * Get measured time in nanoseconds.
+             *
+             * @return Nanoseconds.
+             */
+            unsigned long long int getTimeNanoseconds() const {
+                return accumulatedTime.count();
             }
 
-            void addToAccumulatedSeconds(double value) {
-                accumulatedSeconds += value;
+            /*!
+             * Add given time to measured time.
+             *
+             * @param timeNanoseconds Additional time in nanoseconds.
+             */
+            void addToTime(std::chrono::nanoseconds timeNanoseconds) {
+                accumulatedTime += timeNanoseconds;
             }
 
-            void pause() {
-                if(paused) {
-                    STORM_LOG_WARN("Tried to pause a stopwatch that was already paused.");
-                } else {
-                    accumulatedSeconds = getAccumulatedSeconds();
-                    paused = true;
+            /*!
+             * Stop stopwatch and add measured time to total time.
+             */
+            void stop() {
+                if (stopped) {
+                    // Assertions are only available in DEBUG build and therefore not used here.
+                    STORM_LOG_WARN("Stopwatch is already paused.");
                 }
+                stopped = true;
+                accumulatedTime += std::chrono::high_resolution_clock::now() - startOfCurrentMeasurement;
             }
 
-            void unpause() {
-                if(paused) {
-                    startOfCurrentMeasurement = std::chrono::high_resolution_clock::now();
-                    paused = false;
-                } else {
-                    STORM_LOG_WARN("Tried to unpause a stopwatch that was not paused.");
+            /*!
+             * Start stopwatch (again) and start measuring time.
+             */
+            void start() {
+                if (!stopped) {
+                    // Assertions are only available in DEBUG build and therefore not used here.
+                    STORM_LOG_WARN("Stopwatch is already running.");
                 }
+                stopped = false;
+                startOfCurrentMeasurement = std::chrono::high_resolution_clock::now();
             }
             
-            // Note: Does NOT unpause if stopwatch is currently paused.
+            /*!
+             * Reset the stopwatch. Reset the measured time to zero and stop the stopwatch.
+             */
             void reset() {
-                accumulatedSeconds = 0.0;
-                startOfCurrentMeasurement = std::chrono::high_resolution_clock::now();
+                accumulatedTime = std::chrono::nanoseconds::zero();
+                stopped = true;
             }
 
-            friend std::ostream& operator<<(std::ostream& out, Stopwatch const& sw) {
-                out << (round(sw.getAccumulatedSeconds()*1000)/1000);
+            friend std::ostream& operator<<(std::ostream& out, Stopwatch const& stopwatch) {
+                out << stopwatch.getTimeSeconds();
                 return out;
             }
             
             
         private:
-            double accumulatedSeconds;
-            bool paused;
+            // Total measured time
+            std::chrono::nanoseconds accumulatedTime;
+            // Flag indicating if the stopwatch is stopped right now.
+            bool stopped;
+            // Timepoint when the stopwatch was started the last time.
             std::chrono::high_resolution_clock::time_point startOfCurrentMeasurement;
             
-            
         };
     }
 }