Source/WTF/wtf/MainThreadData.h

/*
 * Copyright (C) 2019 Igalia, S.L.
 * Copyright (C) 2019 Metrological Group B.V.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * aint with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#pragma once

#include <wtf/RunLoop.h>
#include <wtf/StdLibExtras.h>

namespace WTF {

template<typename T>
class MainThreadData {
    WTF_MAKE_FAST_ALLOCATED;
public:
    MainThreadData() { }
    explicit MainThreadData(T&& data)
        : m_data(WTFMove(data))
    { }

    T* operator->()
    {
        ASSERT(isMainThread());
        return &m_data;
    }

    T& operator*()
    {
        ASSERT(isMainThread());
        return m_data;
    }

private:
    T m_data;
};

} // namespace WTF