mirror of
https://github.com/RGBCube/serenity
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83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/Badge.h>
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#include <AK/Noncopyable.h>
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#include <AK/RefCounted.h>
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#include <AK/RefPtr.h>
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#include <LibJS/Forward.h>
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namespace JS {
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class HandleImpl : public RefCounted<HandleImpl> {
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AK_MAKE_NONCOPYABLE(HandleImpl);
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AK_MAKE_NONMOVABLE(HandleImpl);
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public:
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~HandleImpl();
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Cell* cell() { return m_cell; }
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const Cell* cell() const { return m_cell; }
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private:
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template<class T>
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friend class Handle;
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explicit HandleImpl(Cell*);
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Cell* m_cell { nullptr };
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};
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template<class T>
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class Handle {
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public:
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Handle() {}
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static Handle create(T* cell)
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{
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return Handle(adopt(*new HandleImpl(cell)));
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}
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T* cell() { return static_cast<T*>(m_impl->cell()); }
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const T* cell() const { return static_cast<const T*>(m_impl->cell()); }
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private:
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explicit Handle(NonnullRefPtr<HandleImpl> impl)
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: m_impl(move(impl))
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{
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}
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RefPtr<HandleImpl> m_impl;
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};
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template<class T>
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inline Handle<T> make_handle(T* cell)
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{
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return Handle<T>::create(cell);
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}
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}
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