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3d6b838df3
The implemented cloning mechanism should be sound: - If a PartitionTable is passed a File with ShouldCloseFileDescriptor::Yes, then it will keep it alive until the PartitionTable is destroyed. - If a PartitionTable is passed a File with ShouldCloseFileDescriptor::No, then the caller has to ensure that the file descriptor remains alive. If the caller is EBRPartitionTable, the same consideration holds. If the caller is PartitionEditor::PartitionModel, this is satisfied by keeping an OwnPtr<Core::File> around which is the originally opened file. Therefore, we never leak any fds, and never access a Core::File or fd after destroying it.
55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
/*
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* Copyright (c) 2023, Ben Wiederhake <BenWiederhake.GitHub@gmx.de>
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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/Noncopyable.h>
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#ifdef KERNEL
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# include <Kernel/Devices/Storage/StorageDevice.h>
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#else
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# include <AK/MaybeOwned.h>
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# include <LibCore/File.h>
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#endif
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namespace Partition {
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class PartitionableDevice {
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AK_MAKE_NONCOPYABLE(PartitionableDevice);
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public:
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#ifdef KERNEL
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PartitionableDevice(Kernel::StorageDevice&);
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// Userland doesn't get an implicit constructor.
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#endif
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PartitionableDevice(PartitionableDevice&&) = default;
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// Unused, and "move out of reference" isn't well-defined anyway:
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PartitionableDevice& operator=(PartitionableDevice&&) = delete;
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#ifdef KERNEL
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static ErrorOr<PartitionableDevice> create(Kernel::StorageDevice& device);
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#else
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static ErrorOr<PartitionableDevice> create(MaybeOwned<Core::File> device_file);
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#endif
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~PartitionableDevice() = default;
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PartitionableDevice clone_unowned();
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ErrorOr<PartitionableDevice> clone_owned();
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size_t block_size() const;
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ErrorOr<void> read_block(size_t block_index, Bytes block_buffer);
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private:
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#ifdef KERNEL
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Kernel::StorageDevice& m_device;
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#else
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explicit PartitionableDevice(MaybeOwned<Core::File>, size_t block_size);
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MaybeOwned<Core::File> m_device_file;
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size_t m_block_size;
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#endif
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};
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}
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