Add trace_event structs

[ust.git] / include / ust / tracepoint.h

diff --git a/include/ust/tracepoint.h b/include/ust/tracepoint.h
index 9c7c091936d2957e0ed9dc923ba0762a15bf54f9..1c4a384d839b7f6283b4aa8189394ca0c3fb40b3 100644 (file)
--- a/include/ust/tracepoint.h
+++ b/include/ust/tracepoint.h
@@ -337,6 +337,63 @@ extern int tracepoint_unregister_lib(struct tracepoint *tracepoints_start);
  * TRACE_EVENT_FN to perform any (un)registration work.
  */
 
+struct trace_event {
+       const char *name;
+       int (*regfunc)(void *data);
+       int (*unregfunc)(void *data);
+} __attribute__((aligned(32)));
+
+struct trace_event_lib {
+       struct trace_event *trace_events_start;
+       int trace_events_count;
+       struct list_head list;
+};
+
+struct trace_event_iter {
+       struct trace_event_lib *lib;
+       struct trace_event *trace_event;
+};
+
+extern void lock_trace_events(void);
+extern void unlock_trace_events(void);
+
+extern void trace_event_iter_start(struct trace_event_iter *iter);
+extern void trace_event_iter_next(struct trace_event_iter *iter);
+extern void trace_event_iter_reset(struct trace_event_iter *iter);
+
+extern int trace_event_get_iter_range(struct trace_event **trace_event,
+                                     struct trace_event *begin,
+                                     struct trace_event *end);
+
+extern void trace_event_update_process(void);
+extern int is_trace_event_enabled(const char *channel, const char *name);
+
+extern int trace_event_register_lib(struct trace_event *start_trace_events,
+                                   int trace_event_count);
+
+extern int trace_event_unregister_lib(struct trace_event *start_trace_events);
+
+#define TRACE_EVENT_LIB                                                        \
+       extern struct trace_event __start___trace_events[]              \
+       __attribute__((weak, visibility("hidden")));                    \
+       extern struct trace_event __stop___trace_events[]               \
+       __attribute__((weak, visibility("hidden")));                    \
+       static void __attribute__((constructor))                        \
+       __trace_events__init(void)                                      \
+       {                                                               \
+               long trace_event_count =((long)__stop___trace_events-   \
+                                        (long)__start___trace_events)  \
+                       /sizeof(struct trace_event);                    \
+               trace_event_register_lib(__start___trace_events,        \
+                                        trace_event_count);            \
+       }                                                               \
+                                                                       \
+       static void __attribute__((destructor))                         \
+       __trace_event__destroy(void)                                    \
+       {                                                               \
+               trace_event_unregister_lib(__start___trace_events);     \
+       }
+
 #define DECLARE_TRACE_EVENT_CLASS(name, proto, args, tstruct, assign, print)
 #define DEFINE_TRACE_EVENT(template, name, proto, args)                \
        DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))