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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;
/**
* \brief Global
* \note
* Global should be included in any translation unit
* that will use Dict or that implements the singleton
* pattern. It makes sure that the Dict singleton is created
* before and destroyed after all other singletons in GDCM.
*
*/
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();
/// retrieve the default/internal dicts (Part 6)
/// This dict is filled up at load time
Dicts const &GetDicts() const;
Dicts &GetDicts();
/// retrieve the default/internal (Part 3)
/// You need to explicitely call LoadResourcesFiles before
Defs const &GetDefs() const;
/// return the singleton instance
static Global& GetInstance();
/// Load all internal XML files, resource path need to have been
/// set before calling this member function (see Append/Prepend members func)
/// \warning not thread safe !
bool LoadResourcesFiles();
/// Append path at the end of the path list
/// \warning not thread safe !
bool Append(const char *path);
/// Prepend path at the beginning of the path list
/// \warning not thread safe !
bool Prepend(const char *path);
protected:
/// Locate a resource file
const char *Locate(const char *resfile) const;
private:
Global &operator=(const Global &_val); // purposely not implemented
Global(const Global &_val); // purposely not implemented
// 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
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