Write a little measure about current execution speed.

Signed-off-by: Andrea Odetti <mariofutire@gmail.com>

source/frontends/ncurses/main.cpp

@@ -157,11 +157,13 @@ namespace
     {
       const auto end = std::chrono::steady_clock::now();
       const auto diff = end - start;
-      const long ms = std::chrono::duration_cast<std::chrono::microseconds>(diff).count();
+      const long us = std::chrono::duration_cast<std::chrono::microseconds>(diff).count();
 
-      if (ms < nExecutionPeriodUsec)
+      g_relativeSpeed = double(us) / double(nExecutionPeriodUsec);
+
+      if (us < nExecutionPeriodUsec)
       {
-	usleep(nExecutionPeriodUsec - ms);
+	usleep(nExecutionPeriodUsec - us);
       }
     }
 

source/frontends/ncurses/world.cpp

@@ -124,17 +124,6 @@ namespace
     return result;
   }
 
-  void output(const char *fmt, ...)
-  {
-    va_list args;
-    va_start(args, fmt);
-
-    WINDOW * win = frame->getBuffer();
-
-    vwprintw(win, fmt, args);
-    wrefresh(win);
-  }
-
   void VideoUpdateFlash()
   {
     static UINT nTextFlashCnt = 0;
@@ -161,6 +150,19 @@ namespace
 
 }
 
+double g_relativeSpeed = 0;
+
+void output(const char *fmt, ...)
+{
+  va_list args;
+  va_start(args, fmt);
+
+  WINDOW * win = frame->getBuffer();
+
+  vwprintw(win, fmt, args);
+  wrefresh(win);
+}
+
 bool Update40ColCell (int x, int y, int xpixel, int ypixel, int offset)
 {
   frame->init(40);
@@ -253,6 +255,7 @@ void FrameRefresh()
   // approximate
   const double frequency = 0.5 * alpha * F;
   mvwprintw(status, 1, 20, "%5.fHz", frequency);
+  mvwprintw(status, 2, 20, "%5.1f%%", 100 * g_relativeSpeed);
 
   wrefresh(status);
 }

source/frontends/ncurses/world.h

@@ -5,3 +5,6 @@ void ProcessInput();
 void VideoInitialize();
 void VideoUninitialize();
 void VideoRedrawScreen();
+
+void output(const char *fmt, ...);
+extern double g_relativeSpeed;