+static void (*start_hook_func)(int, const char *, void *) = NULL;
+void *start_hook_info;
+static void (*end_hook_func)(int, const char *, void *) = NULL;
+void *end_hook_info;
+
+void log_event_start (void (*func)(int, const char *, void *), void *info)
+{
+ start_hook_func = func;
+ start_hook_info = info;
+}
+
+void log_event_end (void (*func)(int, const char *, void *), void *info)
+{
+ end_hook_func = func;
+ end_hook_info = info;
+}
+