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https://github.com/SerenityOS/serenity
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54bfc3d294
With this patch, we now only cache at most 2^14 blocks, which greatly relieves memory pressure when working with large files.
37 lines
1.1 KiB
C++
37 lines
1.1 KiB
C++
/*
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* Copyright (c) 2024, the SerenityOS developers.
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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/SetOnce.h>
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#include <Kernel/FileSystem/BlockBasedFileSystem.h>
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#include <Kernel/FileSystem/Ext2FS/FileSystem.h>
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namespace Kernel {
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class Ext2FSInode;
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class Ext2FSBlockView {
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public:
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Ext2FSBlockView(Ext2FSInode&);
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ErrorOr<BlockBasedFileSystem::BlockIndex> get_block(BlockBasedFileSystem::BlockIndex);
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ErrorOr<BlockBasedFileSystem::BlockIndex> get_or_allocate_block(BlockBasedFileSystem::BlockIndex, bool zero_newly_allocated_block, bool allow_cache);
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ErrorOr<void> write_block_pointer(BlockBasedFileSystem::BlockIndex logical_block_index, BlockBasedFileSystem::BlockIndex on_disk_index);
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private:
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ErrorOr<void> ensure_block(BlockBasedFileSystem::BlockIndex);
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Ext2FSInode& m_inode;
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Ext2FS::BlockList m_block_list;
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BlockBasedFileSystem::BlockIndex m_first_block = 0;
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BlockBasedFileSystem::BlockIndex m_last_block = 0;
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SetOnce m_block_list_initialized;
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Mutex m_block_list_lock { "BlockList"sv };
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};
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}
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