p.hpp

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// SPDX-License-Identifier: BSD-3-Clause
/* Copyright 2015-2021, Intel Corporation */
 
#ifndef LIBPMEMOBJ_CPP_P_HPP
#define LIBPMEMOBJ_CPP_P_HPP
 
#include <memory>
 
#include <libpmemobj++/detail/common.hpp>
#include <libpmemobj++/detail/specialization.hpp>
 
namespace pmem
{
 
namespace obj
{
template <typename T>
class p {
    typedef p<T> this_type;
 
public:
    p(const T &_val) noexcept : val{_val}
    {
    }
 
    p() = default;
 
    p &
    operator=(const p &rhs)
    {
        this_type(rhs).swap(*this);
 
        return *this;
    }
 
    template <typename Y,
          typename = typename std::enable_if<
              std::is_convertible<Y, T>::value>::type>
    p &
    operator=(const p<Y> &rhs)
    {
        this_type(rhs).swap(*this);
 
        return *this;
    }
 
    operator T() const noexcept
    {
        return this->val;
    }
 
    T &
    get_rw()
    {
        detail::conditional_add_to_tx(this);
 
        return this->val;
    }
 
    const T &
    get_ro() const noexcept
    {
        return this->val;
    }
 
    void
    swap(p &other)
    {
        detail::conditional_add_to_tx(this);
        detail::conditional_add_to_tx(&other);
        std::swap(this->val, other.val);
    }
 
private:
    T val;
};
 
template <class T>
inline void
swap(p<T> &a, p<T> &b)
{
    a.swap(b);
}
 
} /* namespace obj */
 
} /* namespace pmem */
 
#endif /* LIBPMEMOBJ_CPP_P_HPP */