1 /*
2  * Copyright (C) 2020 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_DYNAMIC_DESCRIBE_SLICE_GENERATOR_H_
18 #define SRC_TRACE_PROCESSOR_DYNAMIC_DESCRIBE_SLICE_GENERATOR_H_
19 
20 #include "src/trace_processor/sqlite/db_sqlite_table.h"
21 
22 #include "src/trace_processor/storage/trace_storage.h"
23 
24 namespace perfetto {
25 namespace trace_processor {
26 
27 class TraceProcessorContext;
28 
29 // Dynamic table for implementing the describe_slice table.
30 // See /docs/analysis.md for details about the functionality and usage of this
31 // table.
32 class DescribeSliceGenerator : public DbSqliteTable::DynamicTableGenerator {
33  public:
34   struct InputValues {
35     uint32_t slice_id_value;
36   };
37 
38   explicit DescribeSliceGenerator(TraceProcessorContext* context);
39   ~DescribeSliceGenerator() override;
40 
41   Table::Schema CreateSchema() override;
42   std::string TableName() override;
43   uint32_t EstimateRowCount() override;
44   util::Status ValidateConstraints(const QueryConstraints&) override;
45   std::unique_ptr<Table> ComputeTable(const std::vector<Constraint>& cs,
46                                       const std::vector<Order>& ob) override;
47 
48  private:
49   TraceProcessorContext* context_ = nullptr;
50 };
51 
52 }  // namespace trace_processor
53 }  // namespace perfetto
54 
55 #endif  // SRC_TRACE_PROCESSOR_DYNAMIC_DESCRIBE_SLICE_GENERATOR_H_
56