text: #ifndef _NGX_EVENT_PROBE_H_INCLUDED_
  #define _NGX_EVENT_PROBE_H_INCLUDED_
  
  
  #include <ngx_config.h>
  #include <ngx_core.h>
  #include <ngx_event.h>
  
  
  #if (NGX_DTRACE)
  
  #include <ngx_dtrace_provider.h>
  
  #define ngx_event_probe_timer_add(ev, timer)                                 \
      NGINX_TIMER_ADD(ev, timer)
  
  #define ngx_event_probe_timer_del(ev)                                        \
      NGINX_TIMER_DEL(ev)
  
  #define ngx_event_probe_timer_expire(ev)                                     \
      NGINX_TIMER_EXPIRE(ev)
  
  #else /* !(NGX_DTRACE) */
  
  #define ngx_event_probe_timer_add(ev, timer)
  #define ngx_event_probe_timer_del(ev)
  #define ngx_event_probe_timer_expire(ev)
  
  #endif
  
  
  #endif /* _NGX_EVENT_PROBE_H_INCLUDED_ */
  