QDianaProcessStatus.hh

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/*
 * APOLLO: A complete DAQ and Online Data Analysis Framework for Diana 
 * M.P. created 26/5/4
 * 
 * Class QDianaProcessStatus: class that describes the status of diana process
 *
 */
 
#ifndef __QDIANA_PROCESS_STATUS_HH_
#define __QDIANA_PROCESS_STATUS_HH_
 
#include <string>
 
#include "QDiana.hh"
#include "QNamed.hh"
#include "QId.hh"
 
class QDianaProcessStatus : public QNamed, QId {
public:
  enum ProcessStatus_t {QRunning_s, 
                        QError_s,   
                        QExiting_s  
  };
 
  static QDianaProcessStatus& GetInstance();
 
  virtual ~QDianaProcessStatus() {}
 
  volatile inline ProcessStatus_t GetState() const { return state; }
 
  // checks
  volatile bool isRunning() const { return (state == QRunning_s);}
  volatile bool isError() const {return (state == QError_s);}
  volatile bool isExiting() const {return (state == QExiting_s);}
 
  const std::string& GetError() const {return fError;}  
 
private:
 
  QDianaProcessStatus(); 
  mutable ProcessStatus_t state;
  std::string fError;
 
  inline void SetState(const ProcessStatus_t s) { state=s; }
 
  void SetError(const std::string& s) {fError=s;}
  
  friend void ProcessControlSignalHandler(int);
};
 
  void ProcessControlSignalHandler( int SignalId );  
 
 
 
#endif