gdcmGlobal.h

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/*=========================================================================
 
  Program: GDCM (Grassroots DICOM). A DICOM library
 
  Copyright (c) 2006-2011 Mathieu Malaterre
  All rights reserved.
  See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
 
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.
 
=========================================================================*/
// Implementation detail was shamelessly borowed from the VTK excellent
// implementation of debug leak manager singleton:
/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkDebugLeaks.cxx,v $
 
  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
 
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.
 
=========================================================================*/
#ifndef GDCMGLOBAL_H
#define GDCMGLOBAL_H
 
#include "gdcmTypes.h"
 
namespace gdcm
{
class GlobalInternal;
class Dicts;
class Defs;
class GDCM_EXPORT Global // why expose the symbol I think I only need to expose the instance...
{
  friend std::ostream& operator<<(std::ostream &_os, const Global &g);
public:
  Global();
  ~Global();
  Global &operator=(const Global &_val) = delete;
  Global(const Global &_val) = delete;
 
  Dicts const &GetDicts() const;
  Dicts &GetDicts();
 
  Defs const &GetDefs() const;
 
  static Global& GetInstance();
 
  bool LoadResourcesFiles();
 
  bool Append(const char *path);
 
  bool Prepend(const char *path);
 
protected:
  const char *Locate(const char *resfile) const;
 
private:
  // PIMPL:
  // but we could have also directly exposed a Dicts *Internals;
  static GlobalInternal *Internals;
};
//-----------------------------------------------------------------------------
inline std::ostream& operator<<(std::ostream &os, const Global &g)
{
  (void)g;
  return os;
}
 
// This instance will show up in any translation unit that uses
// Global or that has a singleton.  It will make sure
// Global is initialized before it is used and is the last
// static object destroyed.
static Global GlobalInstance;
 
} // end namespace gdcm
 
#endif //GDCMGLOBAL_H