Add external timer class

external/timer/timer.cpp

@@ -0,0 +1,34 @@
+#include "timer.hpp"
+
+Timer::Timer(void (*function)()) {
+    this->function = function;
+}
+
+void Timer::setTimeout(std::chrono::milliseconds delay) {
+
+    this->p_clear = false;
+    std::thread t([this, delay]() {
+        if(this->p_clear) return;
+        std::this_thread::sleep_for(delay);
+        if(this->p_clear) return;
+        function();
+    });
+    t.detach();
+}
+
+void Timer::setInterval(std::chrono::milliseconds interval) {
+    this->p_clear = false;
+    std::thread t([this, interval]() {
+        while(true) {
+            if(this->p_clear) return;
+            std::this_thread::sleep_for(interval);
+            if(this->p_clear) return;
+            function();
+        }
+    });
+    t.detach();
+}
+
+void Timer::stop() {
+    this->p_clear = true;
+}