Not compiling but lots of progress

include/cpu.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <atomic>
+#include <thread>
+
+class CPU {
+public:
+    CPU();
+    
+    std::atomic<int> CPU_PREVIOUS_IDLE;
+    std::atomic<int> CPU_PREVIOUS_TOTAL;
+    std::atomic<int> CPU_IDLE;
+    std::atomic<int> CPU_TOTAL;
+
+    std::atomic<int> UPDATE_INTERVAL; // ms
+
+    void START_CPU_POLLING();
+    static void CPU_POLL();
+    void END_CPU_POLLING();
+
+    double CPU_PERCENT();
+
+    virtual ~CPU();
+private:
+    std::thread* m_pollThread;
+    std::atomic<bool> m_isPolling;
+};
+
+static CPU* instance;
+static CPU* GetCPUInstance() {
+    if (instance == (void*)0) {
+        CPU cpu;
+        instance = &cpu;
+        return instance;
+    }
+    return instance;
+}
+