Let us start here, from square one. No, from Zero!

util/memutils.h

@@ -0,0 +1,44 @@
+#pragma once
+
+#include <type_traits>
+
+#include <windows.h>
+
+namespace memutils {
+
+    DWORDLONG mem_total();
+    DWORDLONG mem_total_used();
+    DWORDLONG mem_used();
+
+    DWORDLONG vmem_total();
+    DWORDLONG vmem_total_used();
+    DWORDLONG vmem_used();
+
+    /*
+     * Helper class to unprotect/reprotect memory safely.
+     * It will free it's mode override on destruction.
+     */
+    class VProtectGuard {
+    public:
+        explicit VProtectGuard(void *addr, size_t size, DWORD mode = PAGE_EXECUTE_READWRITE, bool reset = true);
+
+        template<typename T>
+        VProtectGuard(T &addr) : VProtectGuard(
+                reinterpret_cast<void *>(addr),
+                sizeof(typename std::remove_pointer<T>::type)) {}
+
+        ~VProtectGuard();
+
+        void dispose();
+
+        inline bool is_bad_address() {
+            return this->bad_address;
+        }
+    protected:
+        void *addr = nullptr;
+        bool bad_address = false;
+        bool reset = true;
+        size_t size = 0;
+        DWORD old_protect = 0;
+    };
+}