JDAQTriggerCounter.hh

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#ifndef __JDAQTRIGGERCOUNTER__
#define __JDAQTRIGGERCOUNTER__
 
#include "JDAQRoot.hh"
 
 
/**
 * \author mdejong
 */
 
namespace KM3NETDAQ {
 
 
  /**
   * Type definition of trigger counter.
   */
  typedef unsigned long long int                            JTriggerCounter_t;
 
 
  /**
   * Auxiliary class to count triggers.
   */
  class JDAQTriggerCounter {
  private:
    /**
     * Constructor.
     *
     * \param  counter        counter value
     */
    JDAQTriggerCounter(const JTriggerCounter_t counter)
    {
      this->trigger_counter = counter;
    }
 
 
  public:
 
    friend size_t getSizeof<JDAQTriggerCounter>();
    friend JReader& operator>>(JReader&, JDAQTriggerCounter&);
    friend JWriter& operator<<(JWriter&, const JDAQTriggerCounter&);
 
    /**
     * Default constructor.
     *
     * This constructor increments the counter of the unique instance
     * of this class and stores the result in this object.
     */
    JDAQTriggerCounter()
    {
      trigger_counter = getInstance().next();
    }
 
 
    /**
     * Virtual destructor.
     */
    virtual ~JDAQTriggerCounter()
    {}
 
 
    /**
     * Get reference to unique instance of this class object.
     *
     * \return               reference to this class object
     */
    static JDAQTriggerCounter& getInstance()
    {
      static JDAQTriggerCounter counter(0);
 
      return counter;
    }
 
 
    /**
     * Get DAQ trigger counter.
     *
     * \return                DAQ trigger counter
     */
    const JDAQTriggerCounter& getDAQTriggerCounter() const
    {
      return static_cast<const JDAQTriggerCounter&>(*this);
    }
 
 
    /**
     * Reset counter of unique instance of this class object.
     */
    static void reset()
    {
      getInstance().trigger_counter = 0;
    }
 
 
    /**
     * Get trigger counter.
     *
     * \return                counter value
     */
    JTriggerCounter_t getCounter() const
    {
      return trigger_counter;
    }
 
 
    /**
     * Set trigger counter.
     *
     * \param  counter        counter value
     */
    void setCounter(const JTriggerCounter_t counter)
    {
      this->trigger_counter = counter;
    }
 
 
    /**
     * Increment trigger counter.
     *
     * \return                counter value
     */
    JTriggerCounter_t next()
    {
      return trigger_counter++;
    }
 
 
    ClassDef(JDAQTriggerCounter,1);
 
 
  protected:
    JTriggerCounter_t trigger_counter;
  };
 
 
  /**
   * Equal operator for DAQ trigger counters.
   *
   * \param  first     trigger counter
   * \param  second    trigger counter
   * \result           true if first trigger counter equal to second; else false
   */
  inline bool operator==(const JDAQTriggerCounter& first,
                         const JDAQTriggerCounter& second)
  {
    return (first.getCounter() == second.getCounter());
  }
 
 
  /**
   * Not-equal operator for DAQ trigger counters.
   *
   * \param  first     trigger counter
   * \param  second    trigger counter
   * \result           true if first trigger counter not equal to second; else false
   */
  inline bool operator!=(const JDAQTriggerCounter& first,
                         const JDAQTriggerCounter& second)
  {
    return !(first == second);
  }
}
 
#endif