chore: Add course material

397/Ex42/TimerSet.cpp

@@ -0,0 +1,24 @@
+#include "TimerSet.h"
+#include "Timer.h"
+#include <iostream>
+
+TimerSet::TimerSet() : previousTime(time(NULL)) {}
+
+void TimerSet::addATimer(Timer *t) { timers.push_back(t); }
+
+void TimerSet::pollAllTimers() {
+    std::time_t timeNow;
+    if (time(&timeNow) > previousTime) {
+        previousTime = timeNow;
+
+        for (auto it = timers.begin(); it != timers.end(); it++) {
+            (*it)->tick();
+        }
+    }
+}
+
+TimerSet &TimerSet::Instance() {
+    // Meyer's Singleton implementation
+    static TimerSet pInstance;
+    return pInstance;
+}