Add handle wrapper class

include/sta/rtos/handle.tpp

@@ -0,0 +1,46 @@
+#ifndef STA_RTOS_HANDLE_TPP
+#define STA_RTOS_HANDLE_TPP
+
+#ifndef STA_RTOS_HANDLE_HPP
+#  error "Internal header. Use <sta/rtos/handle.hpp> instead."
+#endif // !STA_RTOS_HANDLE_HPP
+
+#include <sta/assert.hpp>
+
+
+namespace sta
+{
+	template <typename T>
+	RtosHandle<T>::Deferred::Deferred(handle_type * handlePointer)
+		: pointer{handlePointer}
+	{}
+
+
+	template <typename T>
+	RtosHandle<T>::RtosHandle(handle_type handle)
+		: handle_{handle}, deferred_{false}
+	{}
+
+	template <typename T>
+	RtosHandle<T>::RtosHandle(Deferred handle)
+		: handle_{handle.pointer}, deferred_{true}
+	{
+		STA_ASSERT(handle.pointer != nullptr);
+	}
+
+	template <typename T>
+	typename RtosHandle<T>::handle_type RtosHandle<T>::get()
+	{
+		if (deferred_)
+		{
+			// Dereference void ** in handle
+			handle_ = *reinterpret_cast<handle_type *>(handle_);
+			deferred_ = false;
+		}
+
+		return handle_;
+	}
+} // namespace sta
+
+
+#endif // STA_RTOS_HANDLE_TPP