LXR qemu/trace/event-internal.h

   1/*
   2 * Interface for configuring and controlling the state of tracing events.
   3 *
   4 * Copyright (C) 2012-2016 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__EVENT_INTERNAL_H
  11#define TRACE__EVENT_INTERNAL_H
  12
  13/*
  14 * Special value for TraceEvent.vcpu_id field to indicate
  15 * that the event is not VCPU specific
  16 */
  17#define TRACE_VCPU_EVENT_NONE ((uint32_t)-1)
  18
  19/**
  20 * TraceEvent:
  21 * @id: Unique event identifier.
  22 * @vcpu_id: Unique per-vCPU event identifier.
  23 * @name: Event name.
  24 * @sstate: Static tracing state.
  25 * @dstate: Dynamic tracing state
  26 *
  27 * Interpretation of @dstate depends on whether the event has the 'vcpu'
  28 *  property:
  29 * - false: Boolean value indicating whether the event is active.
  30 * - true : Integral counting the number of vCPUs that have this event enabled.
  31 *
  32 * Opaque generic description of a tracing event.
  33 */
  34typedef struct TraceEvent {
  35    uint32_t id;
  36    uint32_t vcpu_id;
  37    const char * name;
  38    const bool sstate;
  39    uint16_t *dstate;
  40} TraceEvent;
  41
  42void trace_event_set_state_dynamic_init(TraceEvent *ev, bool state);
  43
  44#endif /* TRACE__EVENT_INTERNAL_H */
  45