Add c++11 chrono timer handling

src/utils/time.cpp

@@ -82,15 +82,18 @@ void StkTime::getDate(int *day, int *month, int *year)
     if(year)  *year  = now->tm_year + 1900;
 }   // getDate
 
+// ----------------------------------------------------------------------------
 StkTime::ScopeProfiler::ScopeProfiler(const char* name)
 {
     Log::info("ScopeProfiler", "%s {\n", name);
-    m_time = (float)getRealTime();
+    m_time = getRealTimeMs();
     m_name = name;
-}
+}   // StkTime::ScopeProfiler::ScopeProfiler
 
+// ----------------------------------------------------------------------------
 StkTime::ScopeProfiler::~ScopeProfiler()
 {
-    float f2 = (float)getRealTime();
+    uint64_t difference = getRealTimeMs() - m_time;
-    Log::info("ScopeProfiler", "} // took %f s (%s)\n", (f2 - m_time), m_name.c_str());
+    Log::info("ScopeProfiler", "} // took %d ms (%s)\n",
-}
+        (int)difference, m_name.c_str());
+}   // StkTime::ScopeProfiler::ScopeProfiler

src/utils/time.hpp

@@ -21,8 +21,11 @@
 
 #include "ITimer.h"
 
+#include <chrono>
 #include <stdexcept>
 
+#include "utils/types.hpp"
+
 #ifdef WIN32
 #  define WIN32_LEAN_AND_MEAN
 #  include <windows.h>
@@ -90,7 +93,20 @@ public:
      *  The value is a double precision floating point value in seconds.
      */
     static double getRealTime(long startAt=0);
-
+    // ------------------------------------------------------------------------
+    /** Returns a time based since epoch.
+     *  The value is a 64bit unsigned integer in milliseconds.
+     */
+    static uint64_t getRealTimeMs()
+    {
+        auto now = std::chrono::system_clock::now();
+        auto now_ms =
+            std::chrono::time_point_cast<std::chrono::milliseconds>(now);
+        auto epoch = now_ms.time_since_epoch();
+        auto value =
+            std::chrono::duration_cast<std::chrono::milliseconds>(epoch);
+        return value.count();
+    }
     // ------------------------------------------------------------------------
     /**
      * \brief Compare two different times.
@@ -135,7 +151,7 @@ public:
     // ------------------------------------------------------------------------
     class ScopeProfiler
     {
-        float m_time;
+        uint64_t m_time;
         std::string m_name;
     public:
         ScopeProfiler(const char* name);