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https://github.com/RGBCube/serenity
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728c3fbd14
By protecting all the RefPtr<Custody> objects that may be accessed from multiple threads at the same time (with spinlocks), we remove the need for using LockRefPtr<Custody> (which is basically a RefPtr with a built-in spinlock.)
57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
/*
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* Copyright (c) 2018-2021, 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/FileSystem/Custody.h>
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#include <Kernel/FileSystem/FileSystem.h>
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#include <Kernel/FileSystem/Inode.h>
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#include <Kernel/FileSystem/Mount.h>
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namespace Kernel {
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Mount::Mount(FileSystem& guest_fs, Custody* host_custody, int flags)
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: m_guest(guest_fs.root_inode())
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, m_guest_fs(guest_fs)
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, m_host_custody(LockRank::None, host_custody)
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, m_flags(flags)
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{
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}
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Mount::Mount(Inode& source, Custody& host_custody, int flags)
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: m_guest(source)
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, m_guest_fs(source.fs())
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, m_host_custody(LockRank::None, host_custody)
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, m_flags(flags)
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{
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}
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ErrorOr<NonnullOwnPtr<KString>> Mount::absolute_path() const
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{
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return m_host_custody.with([&](auto& host_custody) -> ErrorOr<NonnullOwnPtr<KString>> {
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if (!host_custody)
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return KString::try_create("/"sv);
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return host_custody->try_serialize_absolute_path();
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});
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}
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LockRefPtr<Inode> Mount::host()
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{
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return m_host_custody.with([](auto& host_custody) -> LockRefPtr<Inode> {
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if (!host_custody)
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return nullptr;
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return &host_custody->inode();
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});
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}
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LockRefPtr<Inode const> Mount::host() const
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{
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return m_host_custody.with([](auto& host_custody) -> LockRefPtr<Inode const> {
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if (!host_custody)
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return nullptr;
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return &host_custody->inode();
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});
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}
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}
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