* memory using malloc(), we must use generic accessors for compat in order to
* *not* use a function to access members and not the variable name.
*/
-#define LTTNG_REF(x) ((typeof(*x) *)(x))
+#define LTTNG_REF(x) ((typeof(*(x)) *) (x))
#ifdef NDEBUG
/*
return calloc(1, size);
}
-template <typename T>
-struct can_malloc
-{
+template <typename MallocableType>
+struct can_malloc {
/*
* gcc versions before 5.0 lack some type traits defined in C++11.
* Since in this instance we use the trait to prevent misuses
#if __GNUG__ && __GNUC__ < 5
static constexpr bool value = true;
#else
- static constexpr bool value = std::is_trivially_constructible<T>::value;
+ static constexpr bool value = std::is_trivially_constructible<MallocableType>::value;
#endif
};
/*
- * Malloc and zero-initialize an object of type T, asserting that T can be
+ * Malloc and zero-initialize an object of type T, asserting that MallocableType can be
* safely malloc-ed (is trivially constructible).
*/
-template<typename T>
-T *zmalloc()
+template <typename MallocableType>
+MallocableType *zmalloc()
{
- static_assert (can_malloc<T>::value, "type can be malloc'ed");
- return (T *) zmalloc_internal(sizeof(T));
+ static_assert(can_malloc<MallocableType>::value, "type can be malloc'ed");
+ return (MallocableType *) zmalloc_internal(sizeof(MallocableType)); /* NOLINT sizeof
+ potentially used on a
+ pointer. */
}
/*
- * Malloc and zero-initialize a buffer of size `size`, asserting that type T
+ * Malloc and zero-initialize a buffer of size `size`, asserting that type AllocatedType
* can be safely malloc-ed (is trivially constructible).
*/
-template<typename T>
-T *zmalloc(size_t size)
+template <typename AllocatedType>
+AllocatedType *zmalloc(size_t size)
{
- static_assert (can_malloc<T>::value, "type can be malloc'ed");
- LTTNG_ASSERT(size >= sizeof(T));
- return (T *) zmalloc_internal(size);
+ static_assert(can_malloc<AllocatedType>::value, "type can be malloc'ed");
+ LTTNG_ASSERT(size >= sizeof(AllocatedType));
+ return (AllocatedType *) zmalloc_internal(size);
}
/*
- * Malloc and zero-initialize an array of `nmemb` elements of type T,
- * asserting that T can be safely malloc-ed (is trivially constructible).
+ * Malloc and zero-initialize an array of `nmemb` elements of type AllocatedType,
+ * asserting that AllocatedType can be safely malloc-ed (is trivially constructible).
*/
-template<typename T>
-T *calloc(size_t nmemb)
+template <typename AllocatedType>
+AllocatedType *calloc(size_t nmemb)
{
- static_assert (can_malloc<T>::value, "type can be malloc'ed");
- return (T *) zmalloc_internal(nmemb * sizeof(T));
+ static_assert(can_malloc<AllocatedType>::value, "type can be malloc'ed");
+ return (AllocatedType *) zmalloc_internal(nmemb * sizeof(AllocatedType)); /* NOLINT sizeof
+ potentially
+ used on a
+ pointer. */
}
/*
- * Malloc an object of type T, asserting that T can be safely malloc-ed (is
+ * Malloc an object of type AllocatedType, asserting that AllocatedType can be safely malloc-ed (is
* trivially constructible).
*/
-template<typename T>
-T *malloc()
+template <typename AllocatedType>
+AllocatedType *malloc()
{
- static_assert (can_malloc<T>::value, "type can be malloc'ed");
- return (T *) malloc(sizeof(T));
+ static_assert(can_malloc<AllocatedType>::value, "type can be malloc'ed");
+ return (AllocatedType *) malloc(sizeof(AllocatedType));
}
/*
- * Malloc a buffer of size `size`, asserting that type T can be safely
+ * Malloc a buffer of size `size`, asserting that AllocatedType can be safely
* malloc-ed (is trivially constructible).
*/
-template<typename T>
-T *malloc(size_t size)
+template<typename AllocatedType>
+AllocatedType *malloc(size_t size)
{
- static_assert (can_malloc<T>::value, "type can be malloc'ed");
- return (T *) malloc(size);
+ static_assert (can_malloc<AllocatedType>::value, "type can be malloc'ed");
+ return (AllocatedType *) malloc(size);
}
/*
* pointers to void, these will not be checked.
*/
-template<typename T>
+template<typename FreedType>
struct can_free
{
/*
#if __GNUG__ && __GNUC__ < 5
static constexpr bool value = true;
#else
- static constexpr bool value = std::is_trivially_destructible<T>::value || std::is_void<T>::value;
+ static constexpr bool value = std::is_trivially_destructible<FreedType>::value ||
+ std::is_void<FreedType>::value;
#endif
};
-template<typename T, typename = typename std::enable_if<!can_free<T>::value>::type>
-void free(T *p) = delete;
+template <typename FreedType, typename = typename std::enable_if<!can_free<FreedType>::value>::type>
+void free(FreedType *p) = delete;
-template<typename T>
-struct can_memset
-{
- static constexpr bool value = std::is_pod<T>::value || std::is_void<T>::value;
+template <typename InitializedType>
+struct can_memset {
+ static constexpr bool value = std::is_pod<InitializedType>::value ||
+ std::is_void<InitializedType>::value;
};
-template <typename T, typename = typename std::enable_if<!can_memset<T>::value>::type>
-void *memset(T *s, int c, size_t n) = delete;
+template <typename InitializedType,
+ typename = typename std::enable_if<!can_memset<InitializedType>::value>::type>
+void *memset(InitializedType *s, int c, size_t n) = delete;
template<typename T>
struct can_memcpy
#endif
};
-template <typename T, typename U,
- typename = typename std::enable_if<!can_memcpy<T>::value>::type,
- typename = typename std::enable_if<!can_memcpy<U>::value>::type>
-void *memcpy(T *d, const U *s, size_t n) = delete;
+template <typename DestinationType,
+ typename SourceType,
+ typename = typename std::enable_if<!can_memcpy<DestinationType>::value>::type,
+ typename = typename std::enable_if<!can_memcpy<SourceType>::value>::type>
+void *memcpy(DestinationType *d, const SourceType *s, size_t n) = delete;
-template<typename T>
-struct can_memmove
-{
+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
#if __GNUG__ && __GNUC__ < 5
static constexpr bool value = true;
#else
- static constexpr bool value = std::is_trivially_copyable<T>::value;
+ static constexpr bool value = std::is_trivially_copyable<MovedType>::value;
#endif
};
-template <typename T, typename U,
- typename = typename std::enable_if<!can_memmove<T>::value>::type,
- typename = typename std::enable_if<!can_memmove<U>::value>::type>
-void *memmove(T *d, const U *s, size_t n) = delete;
+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])))
#endif
-#ifndef container_of
-#define container_of(ptr, type, member) \
- ({ \
- const typeof(((type *)NULL)->member) * __ptr = (ptr); \
- (type *)((char *)__ptr - offsetof(type, member)); \
- })
-#endif
-
#ifndef LTTNG_PACKED
#define LTTNG_PACKED __attribute__((__packed__))
#endif
#define member_sizeof(type, field) sizeof(((type *) 0)->field)
-#define ASSERT_LOCKED(lock) LTTNG_ASSERT(pthread_mutex_trylock(&lock))
-#define ASSERT_RCU_READ_LOCKED(lock) LTTNG_ASSERT(rcu_read_ongoing())
+#define ASSERT_LOCKED(lock) LTTNG_ASSERT(pthread_mutex_trylock(&(lock)))
+#define ASSERT_RCU_READ_LOCKED() LTTNG_ASSERT(rcu_read_ongoing())
+#define ASSERT_RCU_READ_UNLOCKED() LTTNG_ASSERT(!rcu_read_ongoing())
/* Attribute suitable to tag functions as having printf()-like arguments. */
#define ATTR_FORMAT_PRINTF(_string_index, _first_to_check) \
_Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"")
# define DIAGNOSTIC_IGNORE_LOGICAL_OP \
_Pragma("GCC diagnostic ignored \"-Wlogical-op\"")
-# define DIAGNOSTIC_IGNORE_DUPLICATED_BRANCHES \
+#if __GNUG__ && __GNUC__ >= 7
+# define DIAGNOSTIC_IGNORE_DUPLICATED_BRANCHES \
_Pragma("GCC diagnostic ignored \"-Wduplicated-branches\"")
-# define DIAGNOSTIC_IGNORE_INVALID_OFFSETOF \
+#else
+# define DIAGNOSTIC_IGNORE_DUPLICATED_BRANCHES
+#endif /* __GNUG__ && __GNUC__ >= 7 */
+# define DIAGNOSTIC_IGNORE_INVALID_OFFSETOF \
_Pragma("GCC diagnostic ignored \"-Winvalid-offsetof\"")
#endif
return 0;
}
+namespace lttng {
+namespace utils {
+template <class ParentType, class MemberType>
+ParentType *container_of(const MemberType *member, const MemberType ParentType::*ptr_to_member)
+{
+ const ParentType *dummy_parent = nullptr;
+ auto *offset_of_member = reinterpret_cast<const char *>(&(dummy_parent->*ptr_to_member));
+ auto address_of_parent = reinterpret_cast<const char *>(member) - offset_of_member;
+
+ return reinterpret_cast<ParentType *>(address_of_parent);
+}
+} /* namespace utils */
+} /* namespace lttng */
+
#endif /* _MACROS_H */
projects / lttng-tools.git / blobdiff