PassRefPtr.h - mozsearch

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// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef PASSREFPTR_H

#define PASSREFPTR_H

template <typename T> class RefPtr;

template <typename T>

class PassRefPtr {

public:

    PassRefPtr() : m_ptr(0) {}

    PassRefPtr(T* ptr)

        : m_ptr(ptr)

        if (m_ptr)

            m_ptr->ref();

    PassRefPtr(const PassRefPtr<T>& other)

        : m_ptr(other.leakRef())

    PassRefPtr(const RefPtr<T>& other)

        : m_ptr(other.get())

        if (m_ptr)

            m_ptr->ref();

    ~PassRefPtr()

        if (m_ptr)

            m_ptr->deref();

    T* operator->() const { return m_ptr; }

    T* leakRef() const

        T* result = m_ptr;

        m_ptr = 0;

        return result;

private:

    PassRefPtr<T>& operator=(const PassRefPtr<T>& t);

protected:

    mutable T* m_ptr;

};

template <typename T>

class Ref : public PassRefPtr<T>

    using PassRefPtr<T>::PassRefPtr;

    template <typename PtrType> friend Ref<PtrType> adoptRef(PtrType*);

};

template <typename T>

Ref<T> adoptRef(T* ptr)

    Ref<T> result;

    result.m_ptr = ptr;

    return result;

#endif // PASSREFPTR_H