Adding NVS to project

components/project_bases/include/constraints.hpp

@@ -0,0 +1,43 @@
+/**
+ * @file utils.hpp
+ * @author Gustice
+ * @brief Template
+ *
+ * @copyright Copyright (c) 2024
+ */
+#pragma once
+
+#include <cassert>
+#include <exception>
+#include <cstdint>
+
+/**
+ * @brief Base for constructs that allow only one concurrently active instance
+ *
+ * @tparam T
+ * @note needs a `T * T::SingleActive<T>::active{};` definition in source
+ */
+template <typename T>
+class SingleActive {
+    static bool active;
+
+  public:
+    /// @brief Constructor, memorizes if already on instance was successfully build
+    SingleActive() {
+        if (active) {
+            throw "Instance already active";
+        }
+        assert(active == false && "Constructor my only be run if no instance active");
+        active = true;
+    }
+
+    /// @brief Destructor, clears memory of existing instance
+    ~SingleActive() {
+        assert(active == true && "Destructor my only be run on active instance");
+        active = false;
+    }
+
+    // Disable move and assignment
+    SingleActive(SingleActive &other) = delete;
+    void operator=(const SingleActive &) = delete;
+};