-#ifndef container_of
-#define container_of(ptr, type, member) \
- ({ \
- const typeof(((type *)NULL)->member) * __ptr = (ptr); \
- (type *)((char *)__ptr - offsetof(type, member)); \
- })
+template <typename MovedType>
+struct can_memmove {
+ /*
+ * gcc versions before 5.0 lack some type traits defined in C++11.
+ * Since in this instance we use the trait to prevent misuses
+ * of memmove (and statically assert) and not to generate different
+ * code based on this property, simply set value to true and allow
+ * the code to compile. Anyone using a contemporary compiler will
+ * catch the error.
+ */
+#if __GNUG__ && __GNUC__ < 5
+ static constexpr bool value = true;
+#else
+ static constexpr bool value = std::is_trivially_copyable<MovedType>::value;
+#endif
+};
+
+template <typename DestinationType,
+ typename SourceType,
+ typename = typename std::enable_if<!can_memmove<DestinationType>::value>::type,
+ typename = typename std::enable_if<!can_memmove<SourceType>::value>::type>
+void *memmove(DestinationType *d, const SourceType *s, size_t n) = delete;
+
+#ifndef ARRAY_SIZE
+#define ARRAY_SIZE(array) (sizeof(array) / (sizeof((array)[0])))