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 #include <string.h>
  14
  15
  16 extern TraceEvent trace_events[];
  17 extern bool trace_events_dstate[];
  18 extern int trace_events_enabled_count;
  19
  20
  21 static inline TraceEventID trace_event_count(void)
  22 {
  23     return TRACE_EVENT_COUNT;
  24 }
  25
  26 static inline TraceEvent *trace_event_id(TraceEventID id)
  27 {
  28     assert(id < trace_event_count());
  29     return &trace_events[id];
  30 }
  31
  32 static inline bool trace_event_is_pattern(const char *str)
  33 {
  34     assert(str != NULL);
  35     return strchr(str, '*') != NULL;
  36 }
  37
  38 static inline TraceEventID trace_event_get_id(TraceEvent *ev)
  39 {
  40     assert(ev != NULL);
  41     return ev->id;
  42 }
  43
  44 static inline const char * trace_event_get_name(TraceEvent *ev)
  45 {
  46     assert(ev != NULL);
  47     return ev->name;
  48 }
  49
  50 static inline bool trace_event_get_state_static(TraceEvent *ev)
  51 {
  52     assert(ev != NULL);
  53     return ev->sstate;
  54 }
  55
  56 static inline bool trace_event_get_state_dynamic_by_id(int id)
  57 {
  58     return unlikely(trace_events_enabled_count) && trace_events_dstate[id];
  59 }
  60
  61 static inline bool trace_event_get_state_dynamic(TraceEvent *ev)
  62 {
  63     int id = trace_event_get_id(ev);
  64     return trace_event_get_state_dynamic_by_id(id);
  65 }
  66
  67 static inline void trace_event_set_state_dynamic(TraceEvent *ev, bool state)
  68 {
  69     int id = trace_event_get_id(ev);
  70     assert(ev != NULL);
  71     assert(trace_event_get_state_static(ev));
  72     trace_events_enabled_count += state - trace_events_dstate[id];
  73     trace_events_dstate[id] = state;
  74 }
  75
  76 #endif  /* TRACE__CONTROL_INTERNAL_H */