Prepare MainVolume

include/PSX/Auxiliary/io_class_helper.hpp

@@ -3,12 +3,14 @@
 #include "bits.hpp"
 
 #define io_class__2option_map(option0, option1, bit_num) \
-        constexpr void set_##option0() { \
+        constexpr auto& set_##option0() { \
             this->raw_value = bit::clear(this->raw_value, bit_num); \
+            return *this;\
         } \
         \
-        constexpr void set_##option1() { \
+        constexpr auto& set_##option1() { \
             this->raw_value = bit::set(this->raw_value, bit_num); \
+            return *this; \
         }
 
 #define io_class__2option_map_getter(type, option0, option1, name, bit_num) \
@@ -20,4 +22,9 @@
             return static_cast<type>(bit::is_set(this->raw_value, bit_num)); \
         }
 
+template<typename T>
+static constexpr void io_class__volatile_assign(volatile T& dst, const T& src) {
+    dst.raw_value = src.raw_value;
+}
+
 #endif //!__JABYENGINE_IO_CLASS_HELPER_HPP__