fdinhibitor.h

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/* This software and supporting documentation are distributed by
 *     Institut Federatif de Recherche 49
 *     CEA/NeuroSpin, Batiment 145,
 *     91191 Gif-sur-Yvette cedex
 *     France
 *
 * This software is governed by the CeCILL-B license under
 * French law and abiding by the rules of distribution of free software.
 * You can  use, modify and/or redistribute the software under the
 * terms of the CeCILL-B license as circulated by CEA, CNRS
 * and INRIA at the following URL "http://www.cecill.info".
 *
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 * economic rights,  and the successive licensors  have only  limited
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 */
                                                                                
#ifndef CARTOBASE_STREAM_FDINHIBITOR_H
#define CARTOBASE_STREAM_FDINHIBITOR_H

#include <string>
#include <map>
#include <stdio.h>

namespace carto
{

class fdinhibitor
{
public:
  class ResetCallback
  {
  public:
    virtual ~ResetCallback();
    virtual void operator ()( int fd ) = 0;
  };

  fdinhibitor( int fd, bool permanent=false );
  fdinhibitor( FILE *fd, bool permanent=false );
  ~fdinhibitor();

  void  close(void);
  void  open(void);
  void notify( int fd );

  static void registerResetCallback( const std::string & name,
                                     ResetCallback *cbk );
  static bool hasResetCallback( const std::string & name );
  static void unregisterResetCallback( const std::string & name );

private:
  static std::map<std::string, ResetCallback *> & _callbacks();

  int           _fd;
  int           _fdsave;
  int           _fdblocker;
  bool          _permanent;

};

}
#endif