GDCM 2.0.17

gdcmGlobal.h

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00001 /*=========================================================================
00002 
00003   Program: GDCM (Grassroots DICOM). A DICOM library
00004   Module:  $URL$
00005 
00006   Copyright (c) 2006-2010 Mathieu Malaterre
00007   All rights reserved.
00008   See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
00009 
00010      This software is distributed WITHOUT ANY WARRANTY; without even
00011      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
00012      PURPOSE.  See the above copyright notice for more information.
00013 
00014 =========================================================================*/
00015 // Implementation detail was shamelessly borowed from the VTK excellent
00016 // implementation of debug leak manager singleton:
00017 /*=========================================================================
00018 
00019   Program:   Visualization Toolkit
00020   Module:    $RCSfile: vtkDebugLeaks.cxx,v $
00021 
00022   Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
00023   All rights reserved.
00024   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
00025 
00026      This software is distributed WITHOUT ANY WARRANTY; without even
00027      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
00028      PURPOSE.  See the above copyright notice for more information.
00029 
00030 =========================================================================*/
00031 #ifndef GDCMGLOBAL_H
00032 #define GDCMGLOBAL_H
00033 
00034 #include "gdcmTypes.h"
00035 
00036 namespace gdcm
00037 {
00038 class GlobalInternal;
00039 class Dicts;
00040 class Defs;
00050 class GDCM_EXPORT Global // why expose the symbol I think I only need to expose the instance...
00051 {
00052   friend std::ostream& operator<<(std::ostream &_os, const Global &g);
00053 public:
00054   Global();
00055   ~Global();
00056 
00059   Dicts const &GetDicts() const;
00060   Dicts &GetDicts();
00061 
00064   Defs const &GetDefs() const;
00065 
00067   static Global& GetInstance();
00068 
00072   bool LoadResourcesFiles();
00073 
00076   bool Append(const char *path);
00077 
00080   bool Prepend(const char *path);
00081 
00082 protected:
00084   const char *Locate(const char *resfile) const;
00085 
00086 private:
00087   Global &operator=(const Global &_val); // purposely not implemented
00088   Global(const Global &_val); // purposely not implemented
00089   // PIMPL:
00090   // but we could have also directly exposed a Dicts *Internals;
00091   static GlobalInternal *Internals;
00092 };
00093 //-----------------------------------------------------------------------------
00094 inline std::ostream& operator<<(std::ostream &os, const Global &g)
00095 {
00096   (void)g;
00097   return os;
00098 }
00099 
00100 // This instance will show up in any translation unit that uses
00101 // Global or that has a singleton.  It will make sure
00102 // Global is initialized before it is used and is the last
00103 // static object destroyed.
00104 static Global GlobalInstance;
00105 
00106 } // end namespace gdcm
00107 
00108 #endif //GDCMGLOBAL_H

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