Kernel/VM/VMObject.cpp


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/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <Kernel/VM/MemoryManager.h>
#include <Kernel/VM/VMObject.h>

namespace Kernel {

VMObject::VMObject(VMObject const& other)
    : m_physical_pages(other.m_physical_pages)
{
    MM.register_vmobject(*this);
}

VMObject::VMObject(size_t size)
    : m_physical_pages(ceil_div(size, static_cast<size_t>(PAGE_SIZE)))
{
    MM.register_vmobject(*this);
}

VMObject::~VMObject()
{
    {
        ScopedSpinLock lock(m_on_deleted_lock);
        for (auto& it : m_on_deleted)
            it->vmobject_deleted(*this);
        m_on_deleted.clear();
    }

    MM.unregister_vmobject(*this);
    VERIFY(m_regions_count.load(AK::MemoryOrder::memory_order_relaxed) == 0);
}

}