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https://github.com/SerenityOS/serenity.git
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81e23617d6
Custody's unref is one of many implementions of ListedRefCounted's behaviour in the Kernel, which results in avoidable bugs caused by the fragmentation of the implementations. This commit starts the work of replacing all custom implementations with ListedRefCounted by porting Custody to it.
54 lines
1.5 KiB
C++
54 lines
1.5 KiB
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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#pragma once
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#include <AK/Error.h>
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#include <AK/IntrusiveList.h>
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#include <AK/RefPtr.h>
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#include <AK/String.h>
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#include <Kernel/Forward.h>
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#include <Kernel/KString.h>
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#include <Kernel/Library/ListedRefCounted.h>
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#include <Kernel/Locking/MutexProtected.h>
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namespace Kernel {
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// FIXME: Custody needs some locking.
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class Custody : public ListedRefCounted<Custody, LockType::Mutex> {
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public:
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static ErrorOr<NonnullRefPtr<Custody>> try_create(Custody* parent, StringView name, Inode&, int mount_flags);
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~Custody();
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Custody* parent() { return m_parent.ptr(); }
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Custody const* parent() const { return m_parent.ptr(); }
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Inode& inode() { return *m_inode; }
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Inode const& inode() const { return *m_inode; }
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StringView name() const { return m_name->view(); }
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ErrorOr<NonnullOwnPtr<KString>> try_serialize_absolute_path() const;
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String absolute_path() const;
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int mount_flags() const { return m_mount_flags; }
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bool is_readonly() const;
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private:
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Custody(Custody* parent, NonnullOwnPtr<KString> name, Inode&, int mount_flags);
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RefPtr<Custody> m_parent;
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NonnullOwnPtr<KString> m_name;
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NonnullRefPtr<Inode> m_inode;
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int m_mount_flags { 0 };
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mutable IntrusiveListNode<Custody> m_all_custodies_list_node;
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public:
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using AllCustodiesList = IntrusiveList<&Custody::m_all_custodies_list_node>;
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static MutexProtected<Custody::AllCustodiesList>& all_instances();
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};
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}
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