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| #ifndef SMART_POINTER_HPP
#define SMART_POINTER_HPP
#include <cassert>
/**
* @brief ONLY USED IN SmartPointer
**/
template<typename T, typename PtrType = T>
class SharedReference
{
public:
SharedReference(PtrType* ptr):
_Ptr(nullptr),
_Count(1)
{
_Ptr = ptr;
}
/**
* @brief The destructor.
*
* Bye default, use operator delete.
* To override this behavior, free _Ptr and reset it to NULL in the derived destructor.
**/
~SharedReference()
{
assert(_Count == 0);
if(_Ptr)
{
delete _Ptr, _Ptr = nullptr;
}
}
public:
bool releaseOne()
{
_Count--;
if(_Count == 0) {
return true;
}
else {
return false;
}
}
void increaseOne()
{
_Count++;
}
PtrType* data() {
return _Ptr;
}
const PtrType* c_data() {
return _Ptr;
}
protected:
PtrType* _Ptr;
private:
int _Count;
};
/**
* @brief Smart pointer.
*
* The data is auto-freed after the destruction of this object.
**/
template<typename T>
class SmartPointer
{
public:
typedef T value_type;
public:
/**
* @brief The constructor.
*
* @param[in] obj The object to be managed.
**/
explicit SmartPointer(value_type *ptr = nullptr);
/**
* @brief The copy constructor.
*
* The object is not copied.
**/
SmartPointer(const SmartPointer&);
SmartPointer& operator=(const SmartPointer&);
SmartPointer& operator=(value_type*);
/**
* @brief The destructor.
*
* Release this count.
**/
~SmartPointer();
/**
* @brief Release this count to the current reference.
*
* If there are no count any more, the reference is freed.
**/
void release();
/**
* @brief Get if the object is not NULL.
**/
explicit operator bool() const;
/**
* @brief Get a pointer to the object.
*
* Require that the object is not NULL.
**/
value_type& operator*() { return *ptr();}
value_type* operator->() { return ptr();}
const value_type& operator*() const { return *c_ptr();}
const value_type* operator->() const { return c_ptr();}
/**
* @brief Get the data.
*
* The data must not be deleted.
* Require that the object is not NULL.
**/
value_type* ptr();
const value_type* c_ptr() const;
private:
SharedReference<T> *_Ref;
/**
* @brief Add one count to the reference.
*
* @return - The incremented Reference_t
* - Or NULL if there are no reference.
**/
SharedReference<T>* increase() const;
};
#include "SmartPointer.tpp"
#endif // SMART_POINTER_HPP |
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