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ecb169b61e
This will be used later on by the AHCI code to create a Region that spans over scattered DMA pages.
62 lines
2.1 KiB
C++
62 lines
2.1 KiB
C++
/*
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* Copyright (c) 2018-2020, 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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#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()
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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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{
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m_physical_pages.resize(ceil_div(size, static_cast<size_t>(PAGE_SIZE)));
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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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