Bootstrap in-kernel memory management

src/modules/kutil/enum_bitfields.h

@@ -0,0 +1,74 @@
+#pragma once
+
+#include <type_traits>
+
+template<typename E>
+struct is_enum_bitfield { static constexpr bool value = false; };
+
+#define IS_BITFIELD(name) \
+	template<> struct is_enum_bitfield<name> {static constexpr bool value=true;}
+
+template <typename E>
+typename std::enable_if<is_enum_bitfield<E>::value,E>::type
+operator & (E lhs, E rhs)
+{
+	return static_cast<E> (
+		static_cast<typename std::underlying_type<E>::type>(lhs) &
+		static_cast<typename std::underlying_type<E>::type>(rhs));
+}
+
+template <typename E>
+typename std::enable_if<is_enum_bitfield<E>::value,E>::type
+operator ^ (E lhs, E rhs)
+{
+	return static_cast<E> (
+		static_cast<typename std::underlying_type<E>::type>(lhs) ^
+		static_cast<typename std::underlying_type<E>::type>(rhs));
+}
+
+template <typename E>
+typename std::enable_if<is_enum_bitfield<E>::value,E>::type
+operator ~ (E rhs)
+{
+	return static_cast<E>(~static_cast<typename std::underlying_type<E>::type>(rhs));
+}
+
+template <typename E>
+typename std::enable_if<is_enum_bitfield<E>::value,E>::type&
+operator |= (E &lhs, E rhs)
+{
+	lhs = static_cast<E>(
+		static_cast<typename std::underlying_type<E>::type>(lhs) |
+		static_cast<typename std::underlying_type<E>::type>(rhs));
+
+	return lhs;
+}
+
+template <typename E>
+typename std::enable_if<is_enum_bitfield<E>::value,E>::type&
+operator &= (E &lhs, E rhs)
+{
+	lhs = static_cast<E>(
+		static_cast<typename std::underlying_type<E>::type>(lhs) &
+		static_cast<typename std::underlying_type<E>::type>(rhs));
+
+	return lhs;
+}
+
+template <typename E>
+typename std::enable_if<is_enum_bitfield<E>::value,E>::type&
+operator ^= (E &lhs, E rhs)
+{
+	lhs = static_cast<E>(
+		static_cast<typename std::underlying_type<E>::type>(lhs) ^
+		static_cast<typename std::underlying_type<E>::type>(rhs));
+
+	return lhs;
+}
+
+template <typename E>
+typename std::enable_if<is_enum_bitfield<E>::value,bool>::type
+operator ! (E rhs)
+{
+	return static_cast<typename std::underlying_type<E>::type>(rhs) == 0;
+}