macSmartPtr.h

Go to the documentation of this file.

/*************************************************************************************
**
** Copyright 2008, MeVis Medical Solutions AG
**
** The user may use this file in accordance with the license agreement provided with
** the Software or, alternatively, in accordance with the terms contained in a
** written agreement between the user and MeVis Medical Solutions AG.
**
** For further information use the contact form at https://www.mevislab.de/contact
**
**************************************************************************************/
 
#ifndef MAC_SMART_PTR_H
#define MAC_SMART_PTR_H
 
 
#if defined(__APPLE__)
 
#include <macSymbolVisibilityMacros.h>
#include <stdlib.h>
 
namespace macos {
 
  template <class T>
  class SmartPtr
  {
  public:
 
    SmartPtr() : _object(NULL) {}
 
    SmartPtr(const SmartPtr<T> &p) : _object(NULL) {
      setObject(p.object());
    }
 
    SmartPtr(T *o) {
      _object = o;
      if (o) o->retain();
    }
 
    ~SmartPtr() {
      if (_object) _object->release();
    }
 
    SmartPtr<T> &operator=(const SmartPtr<T> &p) {
      setObject(p.object());
      return *this;
    }
 
    SmartPtr<T> &operator=(T *o) {
      setObject(o);
      return *this;
    }
 
    bool operator==(const SmartPtr<T> &p) const {
      return object() == p.object();
    }
 
    bool operator!= (const SmartPtr<T>& p) const {
      return !(*this == p);
    }
 
    bool operator==(T *p) const {
      return object() == p;
    }
 
    bool operator!= (T *p) const {
      return object() != p;
    }
 
    bool isNull() const { return !object(); }
 
    T* operator->() const { return object(); }
 
    T& operator*() const { return *(object()); }
 
    operator T*() const { return object(); }
 
  protected:
 
    T *object() const {
      return _object;
    }
 
    void setObject(T *o) {
      if (o != _object) {
        if (_object) _object->release();
        _object = o;
        if (_object) _object->retain();
      }
    }
 
  private:
 
    T *_object;
  };
 
}
 
#endif  // __APPLE__
#endif  // __macSmartPtr_H