chore: Add course material

397/SolutionEx22/TimerSet.h

@@ -0,0 +1,29 @@
+#ifndef TIMERSET_H
+#define TIMERSET_H
+
+#include <ctime>
+
+class Timer;
+
+class TimerSet {
+  public:
+    void pollAllTimers();
+    void addATimer(Timer *);
+
+  private:
+    TimerSet();
+    Timer *timers[40];
+    int timersInUse;
+    std::time_t previousTime;
+
+    //  Meyer's singleton
+  public:
+    static TimerSet &Instance();
+
+  private:
+    // prevent copying and assignment of the singleton
+    TimerSet(const TimerSet &);
+    TimerSet &operator=(const TimerSet &);
+};
+
+#endif