#include <assert.h>
+/*
+ * By default, LTTng-UST uses the priority 150 for the tracepoint and probe
+ * provider constructors to trace tracepoints located within
+ * constructors/destructors with a higher priority value within the same
+ * module. This priority can be overridden by the application.
+ */
+#ifndef LTTNG_UST_CONSTRUCTOR_PRIO
+#define LTTNG_UST_CONSTRUCTOR_PRIO 150
+#endif
+
#define lttng_ust_notrace __attribute__((no_instrument_function))
/*
* g++ 4.8 and prior do not support C99 compound literals. Therefore,
* force allocating those on the heap with these C++ compilers.
*/
-#if defined (__cplusplus) && defined (__GNUC__) && \
- (__GNUC__ < 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ <= 8))
-# ifndef LTTNG_ALLOCATE_COMPOUND_LITERAL_ON_HEAP
-# define LTTNG_ALLOCATE_COMPOUND_LITERAL_ON_HEAP
+#if defined (__cplusplus) && !defined (__clang__) && defined (__GNUC__) && \
+ ((__GNUC__ < 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ <= 8)))
+# ifndef LTTNG_UST_ALLOCATE_COMPOUND_LITERAL_ON_HEAP
+# define LTTNG_UST_ALLOCATE_COMPOUND_LITERAL_ON_HEAP
# endif
#endif
* Compound literals are part of the C99 and C11 standards, but not
* part of the C++ standards. However, those are supported by both g++ and
* clang. In order to be strictly C++11 compliant, defining
- * LTTNG_ALLOCATE_COMPOUND_LITERAL_ON_HEAP before including this header
+ * LTTNG_UST_ALLOCATE_COMPOUND_LITERAL_ON_HEAP before including this header
* allocates those on the heap in C++.
*
* Example use:
- * static struct mystruct *var = __LTTNG_COMPOUND_LITERAL(struct mystruct, { 1, 2, 3 });
+ * static struct mystruct *var = LTTNG_UST_COMPOUND_LITERAL(struct mystruct, { 1, 2, 3 });
*/
-#if defined (__cplusplus) && defined (LTTNG_ALLOCATE_COMPOUND_LITERAL_ON_HEAP)
-#define __LTTNG_COMPOUND_LITERAL(type, ...) new (type) __VA_ARGS__
+#if defined (__cplusplus) && defined (LTTNG_UST_ALLOCATE_COMPOUND_LITERAL_ON_HEAP)
+#define LTTNG_UST_COMPOUND_LITERAL(type, ...) new (type) __VA_ARGS__
#else
-#define __LTTNG_COMPOUND_LITERAL(type, ...) (type[]) { __VA_ARGS__ }
+#define LTTNG_UST_COMPOUND_LITERAL(type, ...) (type[]) { __VA_ARGS__ }
#endif
/*
* static assertion. This parameter must be a valid C identifier as it will
* be used as a typedef name.
*/
-#if defined (__cplusplus) || __STDC_VERSION__ >= 201112L
+#ifdef __cplusplus
#define lttng_ust_static_assert(predicate, msg, c_identifier_msg) \
static_assert(predicate, msg)
+#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)
+#define lttng_ust_static_assert(predicate, msg, c_identifier_msg) \
+ _Static_assert(predicate, msg)
#else
/*
* Evaluates the predicate and emit a compilation error on failure.
typedef char lttng_ust_static_assert_##c_identifier_msg[2*!!(predicate)-1]
#endif
+/* Combine two tokens. */
+#define LTTNG_UST_COMPILER__COMBINE_TOKENS(_tokena, _tokenb) \
+ _tokena##_tokenb
+#define LTTNG_UST_COMPILER_COMBINE_TOKENS(_tokena, _tokenb) \
+ LTTNG_UST_COMPILER__COMBINE_TOKENS(_tokena, _tokenb)
+/*
+ * Wrap constructor and destructor functions to invoke them as functions with
+ * the constructor/destructor GNU C attributes when building as C, or as the
+ * constructor/destructor of a variable defined within an anonymous namespace
+ * when building as C++.
+ */
+#ifdef __cplusplus
+#define LTTNG_UST_DECLARE_CONSTRUCTOR_DESTRUCTOR(name, constructor_func, \
+ destructor_func, ...) \
+namespace lttng { \
+namespace ust { \
+namespace details { \
+class LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_destructor_, \
+ name) { \
+public: \
+ LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_destructor_, name)() __VA_ARGS__; \
+ ~LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_destructor_, name)() __VA_ARGS__; \
+}; \
+LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_destructor_, name)::LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_destructor_, name)() \
+{ \
+ constructor_func(); \
+} \
+LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_destructor_, name)::~LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_destructor_, name)() \
+{ \
+ destructor_func(); \
+} \
+} \
+} \
+} \
+ \
+namespace { \
+const lttng::ust::details::LTTNG_UST_COMPILER_COMBINE_TOKENS( \
+ lttng_ust_constructor_destructor_, name) \
+ LTTNG_UST_COMPILER_COMBINE_TOKENS(name, registration_instance); \
+}
+#else /* __cplusplus */
+#define LTTNG_UST_DECLARE_CONSTRUCTOR_DESTRUCTOR(name, constructor_func, \
+ destructor_func, ...) \
+ static void LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_, name)(void) \
+ __attribute__((constructor(LTTNG_UST_CONSTRUCTOR_PRIO))) __VA_ARGS__; \
+ static void LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_constructor_, name)(void) \
+ { \
+ constructor_func(); \
+ } \
+ static void LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_destructor_, name)(void) \
+ __attribute__((destructor(LTTNG_UST_CONSTRUCTOR_PRIO))) __VA_ARGS__; \
+ static void LTTNG_UST_COMPILER_COMBINE_TOKENS(lttng_ust_destructor_, name)(void) \
+ { \
+ destructor_func(); \
+ }
+#endif
+
#endif /* _LTTNG_UST_COMPILER_H */