trace/control-internal.h

   1 /*
   2  * Interface for configuring and controlling the state of tracing events.
   3  *
   4  * Copyright (C) 2011-2014 Lluís Vilanova <vilanova@ac.upc.edu>
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  */
   9
  10 #ifndef TRACE__CONTROL_INTERNAL_H
  11 #define TRACE__CONTROL_INTERNAL_H
  12
  13
  14
  15 extern TraceEvent trace_events[];
  16 extern bool trace_events_dstate[];
  17 extern int trace_events_enabled_count;
  18
  19
  20 static inline TraceEventID trace_event_count(void)
  21 {
  22     return TRACE_EVENT_COUNT;
  23 }
  24
  25 static inline TraceEvent *trace_event_id(TraceEventID id)
  26 {
  27     assert(id < trace_event_count());
  28     return &trace_events[id];
  29 }
  30
  31 static inline bool trace_event_is_pattern(const char *str)
  32 {
  33     assert(str != NULL);
  34     return strchr(str, '*') != NULL;
  35 }
  36
  37 static inline TraceEventID trace_event_get_id(TraceEvent *ev)
  38 {
  39     assert(ev != NULL);
  40     return ev->id;
  41 }
  42
  43 static inline const char * trace_event_get_name(TraceEvent *ev)
  44 {
  45     assert(ev != NULL);
  46     return ev->name;
  47 }
  48
  49 static inline bool trace_event_get_state_static(TraceEvent *ev)
  50 {
  51     assert(ev != NULL);
  52     return ev->sstate;
  53 }
  54
  55 static inline bool trace_event_get_state_dynamic_by_id(int id)
  56 {
  57     return unlikely(trace_events_enabled_count) && trace_events_dstate[id];
  58 }
  59
  60 static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
  61 {
  62     int id = trace_event_get_id(ev);
  63     return trace_event_get_state_dynamic_by_id(id);
  64 }
  65
  66 static inline void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
  67 {
  68     int id = trace_event_get_id(ev);
  69     assert(ev != NULL);
  70     assert(trace_event_get_state_static(ev));
  71     trace_events_enabled_count += state - trace_events_dstate[id];
  72     trace_events_dstate[id] = state;
  73 }
  74
  75 #endif  /* TRACE__CONTROL_INTERNAL_H */