| Directory: | cvmfs/ |
|---|---|
| File: | cvmfs/ingestion/task_compress.h |
| Date: | 2024-04-21 02:33:16 |
| Exec | Total | Coverage | |
|---|---|---|---|
| Lines: | 8 | 8 | 100.0% |
| Branches: | 2 | 4 | 50.0% |
| Line | Branch | Exec | Source |
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| 1 | /** | ||
| 2 | * This file is part of the CernVM File System. | ||
| 3 | */ | ||
| 4 | |||
| 5 | #ifndef CVMFS_INGESTION_TASK_COMPRESS_H_ | ||
| 6 | #define CVMFS_INGESTION_TASK_COMPRESS_H_ | ||
| 7 | |||
| 8 | #include <map> | ||
| 9 | |||
| 10 | #include "ingestion/item.h" | ||
| 11 | #include "ingestion/task.h" | ||
| 12 | #include "smallhash.h" | ||
| 13 | #include "util/murmur.hxx" | ||
| 14 | #include "util/posix.h" | ||
| 15 | |||
| 16 | class ItemAllocator; | ||
| 17 | |||
| 18 | class TaskCompress : public TubeConsumer<BlockItem> { | ||
| 19 | public: | ||
| 20 | static const unsigned kCompressedBlockSize = kPageSize * 2; | ||
| 21 | |||
| 22 | 1378 | TaskCompress( | |
| 23 | Tube<BlockItem> *tube_in, | ||
| 24 | TubeGroup<BlockItem> *tubes_out, | ||
| 25 | ItemAllocator *allocator) | ||
| 26 | 1378 | : TubeConsumer<BlockItem>(tube_in) | |
| 27 | 1378 | , tubes_out_(tubes_out) | |
| 28 |
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1378 | , allocator_(allocator) |
| 29 | { | ||
| 30 |
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1378 | tag_map_.Init(16, -1, hasher_int64t); |
| 31 | 1378 | } | |
| 32 | |||
| 33 | protected: | ||
| 34 | virtual void Process(BlockItem *input_block); | ||
| 35 | |||
| 36 | private: | ||
| 37 | 1208779 | static inline uint32_t hasher_int64t(const int64_t &value) { | |
| 38 | 1208779 | return MurmurHash2(&value, sizeof(value), 0x07387a4f); | |
| 39 | } | ||
| 40 | |||
| 41 | /** | ||
| 42 | * Maps input block tag (hence: chunk) to the output block with the compressed | ||
| 43 | * data. | ||
| 44 | */ | ||
| 45 | typedef SmallHashDynamic<int64_t, BlockItem *> TagMap; | ||
| 46 | |||
| 47 | TubeGroup<BlockItem> *tubes_out_; | ||
| 48 | ItemAllocator *allocator_; | ||
| 49 | TagMap tag_map_; | ||
| 50 | }; | ||
| 51 | |||
| 52 | #endif // CVMFS_INGESTION_TASK_COMPRESS_H_ | ||
| 53 |