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66 lines
2.4 KiB
C++
66 lines
2.4 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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#pragma once
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#include <Kernel/VM/AnonymousVMObject.h>
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namespace Kernel {
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class PurgeableVMObject final : public AnonymousVMObject {
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public:
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virtual ~PurgeableVMObject() override;
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static NonnullRefPtr<PurgeableVMObject> create_with_size(size_t);
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virtual NonnullRefPtr<VMObject> clone() override;
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int purge();
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int purge_with_interrupts_disabled(Badge<MemoryManager>);
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bool was_purged() const { return m_was_purged; }
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void set_was_purged(bool b) { m_was_purged = b; }
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bool is_volatile() const { return m_volatile; }
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void set_volatile(bool b) { m_volatile = b; }
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private:
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explicit PurgeableVMObject(size_t);
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explicit PurgeableVMObject(const PurgeableVMObject&);
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int purge_impl();
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PurgeableVMObject& operator=(const PurgeableVMObject&) = delete;
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PurgeableVMObject& operator=(PurgeableVMObject&&) = delete;
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PurgeableVMObject(PurgeableVMObject&&) = delete;
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virtual bool is_purgeable() const override { return true; }
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bool m_was_purged { false };
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bool m_volatile { false };
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};
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}
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