#ifndef RTCYCLES_HH
#define RTCYCLES_HH
#include <click/element.hh>

/*
 * =c
 * RoundTripCycleCount()
 *
 * =s counters
 * measures round trip cycles on a push or pull path
 * 
 * =d
 *
 * Measures the number of CPU cycles it takes for a push or pull to come back
 * to the element. This is a good indication of how much CPU is spent on the
 * Click path after or before this element.
 *
 * =h packets read-only
 * Returns the number of packets that have passed.
 *
 * =h cycles read-only
 * Returns the accumulated round-trip cycles for all passing packets.
 *
 * =h reset_counts write-only
 * Resets C<packets> and C<cycles> counters to zero when written.
 *
 * =a SetCycleCount, CycleCountAccum, SetPerfCount, PerfCountAccum
 */

class RTCycles : public Element { public:
  
  RTCycles();
  ~RTCycles();
  
  const char *class_name() const	{ return "RoundTripCycleCount"; }
  const char *port_count() const	{ return PORTS_1_1; }
  const char *processing() const	{ return AGNOSTIC; }

  void push(int, Packet *p);
  Packet *pull(int);
  void add_handlers();
  
  uint64_t _accum;
  uint64_t _npackets;
  
};

#endif