SbLazyPimplPtr.h

#ifndef COIN_SBLAZYPIMPLPTR_H
#define COIN_SBLAZYPIMPLPTR_H
 
/**************************************************************************\
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 * All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
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// The SbLazyPimplPtr<> class is loosely based on the boost::pimpl_ptr<>-
// proposal of 2005 by Asger Mangaard.
//
// It is reimplemented here as separate classes, not with policy-based
// templates, because we still try to support compilers that don't support
// template templates (e.g. Visual C++ 6).
//
// See also SbPimplPtr<>, our implementation of the immediate-creation
// policy.
 
#include <Inventor/SbBasic.h>
 
/* ********************************************************************** */
 
#if defined(_MSC_VER) && (_MSC_VER < 1400) /* MSVC <8 */
#pragma warning(push)
#pragma warning(disable:4251) // for DLL-interface warning
#endif /* MSVC <8 */
 
template <typename T>
class COIN_DLL_API SbLazyPimplPtr {
public:
  SbLazyPimplPtr(void);
  SbLazyPimplPtr(T * initial);
  SbLazyPimplPtr(const SbLazyPimplPtr<T> & copy);
  ~SbLazyPimplPtr(void);
 
  void set(T * value);
  T & get(void) const;
 
  SbLazyPimplPtr<T> & operator = (const SbLazyPimplPtr<T> & copy);
 
  SbBool operator == (const SbLazyPimplPtr<T> & rhs) const;
  SbBool operator != (const SbLazyPimplPtr<T> & rhs) const;
 
  const T * operator -> (void) const;
  T * operator -> (void);
 
protected:
  T * getNew(void) const;
 
protected:
  mutable T * ptr;
 
}; // SbLazyPimplPtr
 
#ifdef COIN_INTERNAL
// the implementation is in the .hpp class
#include <Inventor/tools/SbLazyPimplPtr.hpp>
#endif // COIN_INTERNAL
 
#if defined(_MSC_VER) && (_MSC_VER < 1400) /* MSVC <8 */
#pragma warning(pop)
#endif /* MSVC <8 */
 
/* ********************************************************************** */
 
#endif // !COIN_SBLAZYPIMPLPTR_H