kernel: C++ read_once() and write_once() functions

include/socks/compiler.h

@@ -4,6 +4,20 @@
 #define READ_ONCE(t, p) (*((const volatile t *)&(p)))
 #define WRITE_ONCE(t, p, v) *(volatile t *)&(p) = (v)
 
+#ifdef __cplusplus
+template <typename T>
+T read_once(const volatile T *ptr)
+{
+	return *ptr;
+}
+
+template <typename T>
+void write_once(volatile T *ptr, T value)
+{
+	*ptr = value;
+}
+#endif
+
 #undef __used
 #define __used __attribute__((used))