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// Copyright (c) 1994 James Clark
// See the file COPYING for copying permission.
#ifndef Ptr_DEF_INCLUDED
#define Ptr_DEF_INCLUDED 1
#ifdef SP_NAMESPACE
namespace SP_NAMESPACE {
#endif
template<class T>
Ptr<T>::Ptr(T *ptr) : ptr_(ptr)
{
if (ptr_)
ptr_->ref();
}
template<class T>
Ptr<T>::~Ptr()
{
if (ptr_) {
if (ptr_->unref())
delete ptr_;
ptr_ = 0;
}
}
template<class T>
Ptr<T>::Ptr(const Ptr<T> &p)
: ptr_(p.ptr_)
{
if (p.ptr_)
p.ptr_->ref();
}
template<class T>
Ptr<T> &Ptr<T>::operator=(const Ptr<T> &p)
{
if (p.ptr_)
p.ptr_->ref();
if (ptr_ && ptr_->unref())
delete ptr_;
ptr_ = p.ptr_;
return *this;
}
template<class T>
Ptr<T> &Ptr<T>::operator=(T *p)
{
if (p)
p->ref();
if (ptr_ && ptr_->unref())
delete ptr_;
ptr_ = p;
return *this;
}
template<class T>
void Ptr<T>::clear()
{
if (ptr_) {
if (ptr_->unref())
delete ptr_;
ptr_ = 0;
}
}
#ifdef SP_NAMESPACE
}
#endif
#endif /* not Ptr_DEF_INCLUDED */
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