Memory Resource / View

include/cuda/memory_resource

@@ -112,6 +112,44 @@ bool __is_type(const ::std::type_info *__ti1, const void *__fallback_ti1) {
 template <typename _ResourcePointer, typename... _Properties>
 class basic_resource_view;
 
+template <typename... _Properties>
+struct properties;
+
+
+namespace detail {
+  template <typename... _Properties>
+  struct __kind_from_properties_helper {
+    using type = void;
+  };
+
+  template <typename... _Properties>
+  using __kind_from_properties_helper_t = typename __kind_from_properties_helper<_Properties...>::type;
+
+  template <typename _Kind, typename... _Tail>
+  struct __kind_from_properties_helper<is_kind<_Kind>, _Tail...> {
+    using type = _Kind;
+  };
+
+  template <typename _FirstProp, typename... _Tail>
+  struct __kind_from_properties_helper<_FirstProp, _Tail...> {
+    using type = __kind_from_properties_helper_t<_Tail...>;
+  };
+}
+
+
+/*!
+ * \brief Evaluaes to the a memory kind tag form _Properties (if listed as is_kind)
+ *        or to a list of properties otherwise.
+ */
+template <typename... _Properties>
+struct kind_from_properties {
+  using type = _CUDA_VSTD::conditional_t<
+    _CUDA_VSTD::is_same<detail::__kind_from_properties_helper_t<_Properties...>, void>,
+    detail::__kind_from_properties_helper_t<_Properties...>
+  >;
+};
+
+
 /*!
  * \brief Groups the tag types denoting the execution environment in which the memory can be accessed
  *
@@ -815,8 +853,6 @@ public:
 
     template <typename _Ptr2, typename... _Props2>
     bool operator==(const cuda::basic_resource_view<_Ptr2, _Props2...> &__v2) const noexcept {
-      using __view1_t = basic_resource_view;
-      using __view2_t = basic_resource_view<_Ptr2, _Props2...>;
       if (__pointer == nullptr || __v2.__pointer == nullptr)
         return __pointer == nullptr && __v2.__pointer == nullptr;
       return static_cast<const detail::memory_resource_base*>(__pointer)->is_equal(*__v2.__pointer);