DbuSignalHandler.h

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#ifndef DBUSIGNALHANDLER_H
#define DBUSIGNALHANDLER_H

// $Id: DbuSignalHandler.h,v 1.4 2005/04/19 09:25:56 rhatcher Exp $
//
// rhatcher@fnal.gov

#include <stdlib.h>
#include "TSysEvtHandler.h"

class DbuSignalHandler : public TObject 
{

 public:

  static DbuSignalHandler& Instance();

  void Delay();
  void HandleDelayedSignal();

  static bool SignalAction(int signal);

 private:

  // Singleton
  DbuSignalHandler();
  DbuSignalHandler(DbuSignalHandler& /* dsh */) : TObject() { abort(); }
  DbuSignalHandler& operator=(const DbuSignalHandler& dsh)
    { abort(); return const_cast<DbuSignalHandler&>(dsh); }
  ~DbuSignalHandler();
  

   // Helper class to handle deletion of singleton
   struct Cleaner {
      void ClassIsUsed() { }; // dummy method to keep compilers quiet
      ~Cleaner() {
         if (DbuSignalHandler::fgInstance!=0) {
            delete DbuSignalHandler::fgInstance;
            DbuSignalHandler::fgInstance = 0;
         }
      }
   };
   friend struct Cleaner;   

  static DbuSignalHandler *fgInstance;

  TSignalHandler* fSIGINT;
  TSignalHandler* fSIGTERM;

};

#endif // DBUSIGNALHANDLER_H

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