1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SRC_TRACE_PROCESSOR_PRELUDE_OPERATORS_WINDOW_OPERATOR_H_ 18 #define SRC_TRACE_PROCESSOR_PRELUDE_OPERATORS_WINDOW_OPERATOR_H_ 19 20 #include <limits> 21 #include <memory> 22 23 #include "perfetto/base/status.h" 24 #include "src/trace_processor/sqlite/sqlite_table.h" 25 26 namespace perfetto { 27 namespace trace_processor { 28 29 class TraceStorage; 30 31 class WindowOperatorTable final 32 : public TypedSqliteTable<WindowOperatorTable, const TraceStorage*> { 33 public: 34 enum Column { 35 kRowId = 0, 36 kQuantum = 1, 37 kWindowStart = 2, 38 kWindowDur = 3, 39 kTs = 4, 40 kDuration = 5, 41 kQuantumTs = 6 42 }; 43 class Cursor final : public SqliteTable::BaseCursor { 44 public: 45 explicit Cursor(WindowOperatorTable*); 46 ~Cursor() final; 47 48 Cursor(Cursor&&) = default; 49 Cursor& operator=(Cursor&&) = default; 50 51 // Implementation of SqliteTable::Cursor. 52 base::Status Filter(const QueryConstraints& qc, 53 sqlite3_value**, 54 FilterHistory); 55 base::Status Next(); 56 bool Eof(); 57 base::Status Column(sqlite3_context*, int N); 58 59 private: 60 // Defines the data to be generated by the table. 61 enum FilterType { 62 // Returns all the spans. 63 kReturnAll = 0, 64 // Only returns the first span of the table. Useful for UPDATE operations. 65 kReturnFirst = 1, 66 }; 67 68 int64_t window_start_ = 0; 69 int64_t window_end_ = 0; 70 int64_t step_size_ = 0; 71 72 int64_t current_ts_ = 0; 73 int64_t quantum_ts_ = 0; 74 int64_t row_id_ = 0; 75 76 FilterType filter_type_ = FilterType::kReturnAll; 77 78 WindowOperatorTable* table_ = nullptr; 79 }; 80 81 WindowOperatorTable(sqlite3*, const TraceStorage*); 82 ~WindowOperatorTable() final; 83 84 // Table implementation. 85 base::Status Init(int, const char* const*, Schema* schema) final; 86 std::unique_ptr<SqliteTable::BaseCursor> CreateCursor() final; 87 int BestIndex(const QueryConstraints&, BestIndexInfo*) final; 88 base::Status ModifyConstraints(QueryConstraints* qc) final; 89 base::Status Update(int, sqlite3_value**, sqlite3_int64*) final; 90 91 private: 92 int64_t quantum_ = 0; 93 int64_t window_start_ = 0; 94 95 // max of int64_t because SQLite technically only supports int64s and not 96 // uint64s. 97 int64_t window_dur_ = std::numeric_limits<int64_t>::max(); 98 }; 99 100 } // namespace trace_processor 101 } // namespace perfetto 102 103 #endif // SRC_TRACE_PROCESSOR_PRELUDE_OPERATORS_WINDOW_OPERATOR_H_ 104