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59049ae4b7
Let's enforce the invariant that VMObjects don't shrink or grow by storing the pages in a FixedArray.
38 lines
787 B
C++
38 lines
787 B
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/VM/MemoryManager.h>
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#include <Kernel/VM/VMObject.h>
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namespace Kernel {
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VMObject::VMObject(const VMObject& other)
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: m_physical_pages(other.m_physical_pages)
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{
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MM.register_vmobject(*this);
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}
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VMObject::VMObject(size_t size)
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: m_physical_pages(ceil_div(size, static_cast<size_t>(PAGE_SIZE)))
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{
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MM.register_vmobject(*this);
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}
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VMObject::~VMObject()
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{
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{
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ScopedSpinLock lock(m_on_deleted_lock);
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for (auto& it : m_on_deleted)
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it->vmobject_deleted(*this);
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m_on_deleted.clear();
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}
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MM.unregister_vmobject(*this);
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VERIFY(m_regions_count.load(AK::MemoryOrder::memory_order_relaxed) == 0);
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}
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}
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