41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
#pragma once
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#ifndef MESSMER_BLOBSTORE_IMPLEMENTATIONS_ONBLOCKS_DATANODESTORE_DATALEAFNODE_H_
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#define MESSMER_BLOBSTORE_IMPLEMENTATIONS_ONBLOCKS_DATANODESTORE_DATALEAFNODE_H_
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#include "DataNode.h"
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namespace blobstore {
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namespace onblocks {
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namespace datanodestore {
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class DataInnerNode;
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class DataLeafNode final: public DataNode {
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public:
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static cpputils::unique_ref<DataLeafNode> CreateNewNode(blockstore::BlockStore *blockStore, const DataNodeLayout &layout, cpputils::Data data);
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static cpputils::unique_ref<DataLeafNode> OverwriteNode(blockstore::BlockStore *blockStore, const DataNodeLayout &layout, const blockstore::BlockId &blockId, cpputils::Data data);
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DataLeafNode(DataNodeView block);
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~DataLeafNode();
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//Returning uint64_t, because calculations handling this probably need to be done in 64bit to support >4GB blobs.
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uint64_t maxStoreableBytes() const;
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void read(void *target, uint64_t offset, uint64_t size) const;
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void write(const void *source, uint64_t offset, uint64_t size);
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uint32_t numBytes() const;
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void resize(uint32_t size);
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private:
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void fillDataWithZeroesFromTo(off_t begin, off_t end);
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DISALLOW_COPY_AND_ASSIGN(DataLeafNode);
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};
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}
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}
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}
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#endif
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