storage/value_store/value_store.h
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #pragma once | ||
| 2 | |||
| 3 | #include <cstddef> | ||
| 4 | #include <cstdint> | ||
| 5 | #include <stdexcept> | ||
| 6 | #include <string> | ||
| 7 | #include <vector> | ||
| 8 | |||
| 9 | #include "storage/index/index.h" | ||
| 10 | |||
| 11 | class ValueStore { | ||
| 12 | public: | ||
| 13 | struct ReadResult { | ||
| 14 | std::vector<char> data; | ||
| 15 | }; | ||
| 16 | |||
| 17 | struct WriteSpec { | ||
| 18 | const void* data; | ||
| 19 | size_t size; | ||
| 20 | }; | ||
| 21 | |||
| 22 | struct DirectFixedRow { | ||
| 23 | const char* data = nullptr; | ||
| 24 | size_t size = 0; | ||
| 25 | bool missing = false; | ||
| 26 | }; | ||
| 27 | |||
| 28 | 1850 | virtual ~ValueStore() = default; | |
| 29 | |||
| 30 | virtual uint64_t Alloc(size_t size) = 0; | ||
| 31 | virtual void Write(uint64_t handle, const void* data, size_t size) = 0; | ||
| 32 | virtual uint64_t AllocAndWrite(const void* data, size_t size) = 0; | ||
| 33 | virtual size_t Read(uint64_t handle, void* out_buf, size_t buf_size) = 0; | ||
| 34 | virtual void Free(uint64_t handle) = 0; | ||
| 35 | 83738 | virtual void Retire(uint64_t handle) { Free(handle); } | |
| 36 | 73614 | virtual const char* DirectPtr(uint64_t handle) const { return nullptr; } | |
| 37 | ✗ | virtual char* RDMABackingData() const { return nullptr; } | |
| 38 | ✗ | virtual size_t RDMABackingSize() const { return 0; } | |
| 39 | virtual size_t SlotCapacity(uint64_t handle) const = 0; | ||
| 40 | ✗ | virtual void BatchWrite(const std::vector<uint64_t>& handles, | |
| 41 | const std::vector<WriteSpec>& specs) { | ||
| 42 | ✗ | if (handles.size() != specs.size()) { | |
| 43 | ✗ | throw std::invalid_argument("BatchWrite size mismatch"); | |
| 44 | } | ||
| 45 | ✗ | for (size_t i = 0; i < handles.size(); ++i) { | |
| 46 | ✗ | if (handles[i] == kValueHandleNone) { | |
| 47 | ✗ | continue; | |
| 48 | } | ||
| 49 | ✗ | Write(handles[i], specs[i].data, specs[i].size); | |
| 50 | } | ||
| 51 | ✗ | } | |
| 52 | |||
| 53 | ✗ | virtual void BatchRead(const std::vector<uint64_t>& handles, | |
| 54 | std::vector<ReadResult>& out_results) { | ||
| 55 | ✗ | out_results.resize(handles.size()); | |
| 56 | ✗ | for (size_t i = 0; i < handles.size(); ++i) { | |
| 57 | ✗ | if (handles[i] == kValueHandleNone) { | |
| 58 | ✗ | out_results[i].data.clear(); | |
| 59 | ✗ | continue; | |
| 60 | } | ||
| 61 | ✗ | const size_t cap = SlotCapacity(handles[i]); | |
| 62 | ✗ | out_results[i].data.resize(cap); | |
| 63 | ✗ | const size_t actual = Read( | |
| 64 | ✗ | handles[i], out_results[i].data.data(), out_results[i].data.size()); | |
| 65 | ✗ | out_results[i].data.resize(actual); | |
| 66 | } | ||
| 67 | ✗ | } | |
| 68 | |||
| 69 | 4 | virtual bool ReadFlatFixedRows( | |
| 70 | const uint64_t* handles, | ||
| 71 | size_t num_rows, | ||
| 72 | void* out_buf, | ||
| 73 | size_t row_bytes, | ||
| 74 | uint64_t* missing_rows) const { | ||
| 75 | (void)handles; | ||
| 76 | (void)num_rows; | ||
| 77 | (void)out_buf; | ||
| 78 | (void)row_bytes; | ||
| 79 | (void)missing_rows; | ||
| 80 | 4 | return false; | |
| 81 | } | ||
| 82 | |||
| 83 | ✗ | virtual bool ReadFlatFixedRowSlices( | |
| 84 | const uint64_t* handles, | ||
| 85 | size_t num_rows, | ||
| 86 | void* out_buf, | ||
| 87 | size_t stored_row_bytes, | ||
| 88 | size_t source_offset_bytes, | ||
| 89 | size_t output_row_bytes, | ||
| 90 | uint64_t* missing_rows) const { | ||
| 91 | (void)handles; | ||
| 92 | (void)num_rows; | ||
| 93 | (void)out_buf; | ||
| 94 | (void)stored_row_bytes; | ||
| 95 | (void)source_offset_bytes; | ||
| 96 | (void)output_row_bytes; | ||
| 97 | (void)missing_rows; | ||
| 98 | ✗ | return false; | |
| 99 | } | ||
| 100 | |||
| 101 | ✗ | virtual bool GetDirectFixedRows( | |
| 102 | const uint64_t* handles, | ||
| 103 | size_t num_rows, | ||
| 104 | size_t row_bytes, | ||
| 105 | DirectFixedRow* rows, | ||
| 106 | uint64_t* missing_rows) const { | ||
| 107 | (void)handles; | ||
| 108 | (void)num_rows; | ||
| 109 | (void)row_bytes; | ||
| 110 | (void)rows; | ||
| 111 | (void)missing_rows; | ||
| 112 | ✗ | return false; | |
| 113 | } | ||
| 114 | |||
| 115 | virtual std::vector<uint64_t> | ||
| 116 | 272 | BatchAllocAndWrite(const std::vector<WriteSpec>& specs) { | |
| 117 | 272 | std::vector<uint64_t> handles; | |
| 118 | 272 | handles.reserve(specs.size()); | |
| 119 | 1292 | for (const auto& spec : specs) { | |
| 120 | 1020 | handles.push_back(AllocAndWrite(spec.data, spec.size)); | |
| 121 | } | ||
| 122 | 272 | return handles; | |
| 123 | ✗ | } | |
| 124 | |||
| 125 | 309024 | virtual uint64_t AllocAndWrite(uint64_t key, const void* data, size_t size) { | |
| 126 | (void)key; | ||
| 127 | 309024 | return AllocAndWrite(data, size); | |
| 128 | } | ||
| 129 | |||
| 130 | 380 | virtual std::vector<uint64_t> BatchAllocAndWrite( | |
| 131 | const std::vector<uint64_t>& keys, const std::vector<WriteSpec>& specs) { | ||
| 132 | 380 | if (keys.size() != specs.size()) { | |
| 133 | ✗ | throw std::invalid_argument("BatchAllocAndWrite size mismatch"); | |
| 134 | } | ||
| 135 | 380 | if (GetLayoutId().plain()) { | |
| 136 | 380 | return BatchAllocAndWrite(specs); | |
| 137 | } | ||
| 138 | ✗ | std::vector<uint64_t> handles; | |
| 139 | ✗ | handles.reserve(keys.size()); | |
| 140 | ✗ | for (size_t i = 0; i < keys.size(); ++i) { | |
| 141 | ✗ | handles.push_back(AllocAndWrite(keys[i], specs[i].data, specs[i].size)); | |
| 142 | } | ||
| 143 | ✗ | return handles; | |
| 144 | ✗ | } | |
| 145 | |||
| 146 | struct LayoutId { | ||
| 147 | uint32_t strategy = 0; | ||
| 148 | uint64_t checksum = 0; | ||
| 149 | 726 | bool plain() const { return strategy == 0; } | |
| 150 | }; | ||
| 151 | |||
| 152 | 754 | virtual LayoutId GetLayoutId() const { return {}; } | |
| 153 | |||
| 154 | ✗ | virtual void ResetStats() {} | |
| 155 | ✗ | virtual std::string GetInfo() const { return "(no info)"; } | |
| 156 | ✗ | virtual std::string ExtraResultFields() const { return ""; } | |
| 157 | }; | ||
| 158 |