MeVis/Foundation/Sources/OSXSupport/macSmartPtr.h

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// **InsertLicense** code author="Felix Ritter" version="1.0"


#ifndef __macSmartPtr_H
#define __macSmartPtr_H
#if defined(__APPLE__)

#include <stdlib.h>

namespace macx {
  
  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