49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
#pragma once
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#ifndef BLOCKSTORE_IMPLEMENTATIONS_ONDISK_ONDISKBLOCK_H_
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#define BLOCKSTORE_IMPLEMENTATIONS_ONDISK_ONDISKBLOCK_H_
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#include <boost/filesystem/path.hpp>
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#include <messmer/blockstore/interface/Block.h>
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#include <messmer/blockstore/utils/Data.h>
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#include <iostream>
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#include "messmer/cpp-utils/macros.h"
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namespace blockstore {
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namespace ondisk {
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class OnDiskBlockStore;
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class OnDiskBlock: public Block {
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public:
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virtual ~OnDiskBlock();
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static std::unique_ptr<OnDiskBlock> LoadFromDisk(const boost::filesystem::path &rootdir, const Key &key);
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static std::unique_ptr<OnDiskBlock> CreateOnDisk(const boost::filesystem::path &rootdir, const Key &key, size_t size);
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static void RemoveFromDisk(const boost::filesystem::path &rootdir, const Key &key);
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const void *data() const override;
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void write(const void *source, uint64_t offset, uint64_t size) override;
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void flush() override;
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size_t size() const override;
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private:
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const boost::filesystem::path _filepath;
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Data _data;
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bool _dataChanged;
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OnDiskBlock(const Key &key, const boost::filesystem::path &filepath, size_t size);
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OnDiskBlock(const Key &key, const boost::filesystem::path &filepath, Data &&data);
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void _fillDataWithZeroes();
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void _storeToDisk() const;
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DISALLOW_COPY_AND_ASSIGN(OnDiskBlock);
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};
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}
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}
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#endif
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