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Diffstat (limited to 'src/trace_processor/sqlite/sql_stats_table.h')
-rw-r--r-- | src/trace_processor/sqlite/sql_stats_table.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/trace_processor/sqlite/sql_stats_table.h b/src/trace_processor/sqlite/sql_stats_table.h new file mode 100644 index 000000000..c146ee8f0 --- /dev/null +++ b/src/trace_processor/sqlite/sql_stats_table.h @@ -0,0 +1,86 @@ +/* + * Copyright (C) 2018 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef SRC_TRACE_PROCESSOR_SQLITE_SQL_STATS_TABLE_H_ +#define SRC_TRACE_PROCESSOR_SQLITE_SQL_STATS_TABLE_H_ + +#include <limits> +#include <memory> + +#include "src/trace_processor/sqlite/sqlite_table.h" + +namespace perfetto { +namespace trace_processor { + +class QueryConstraints; +class TraceStorage; + +// A virtual table that allows to introspect performances of the SQL engine +// for the kMaxLogEntries queries. +class SqlStatsTable : public SqliteTable { + public: + enum Column { + kQuery = 0, + kTimeQueued = 1, + kTimeStarted = 2, + kTimeFirstNext = 3, + kTimeEnded = 4, + }; + + // Implementation of the SQLite cursor interface. + class Cursor : public SqliteTable::Cursor { + public: + Cursor(SqlStatsTable* storage); + ~Cursor() override; + + // Implementation of SqliteTable::Cursor. + int Filter(const QueryConstraints&, + sqlite3_value**, + FilterHistory) override; + int Next() override; + int Eof() override; + int Column(sqlite3_context*, int N) override; + + private: + Cursor(Cursor&) = delete; + Cursor& operator=(const Cursor&) = delete; + + Cursor(Cursor&&) noexcept = default; + Cursor& operator=(Cursor&&) = default; + + size_t row_ = 0; + size_t num_rows_ = 0; + const TraceStorage* storage_ = nullptr; + SqlStatsTable* table_ = nullptr; + }; + + SqlStatsTable(sqlite3*, const TraceStorage* storage); + + static void RegisterTable(sqlite3* db, const TraceStorage* storage); + + // Table implementation. + util::Status Init(int, const char* const*, Schema*) override; + std::unique_ptr<SqliteTable::Cursor> CreateCursor() override; + int BestIndex(const QueryConstraints&, BestIndexInfo*) override; + + private: + const TraceStorage* const storage_; +}; + +} // namespace trace_processor +} // namespace perfetto + +#endif // SRC_TRACE_PROCESSOR_SQLITE_SQL_STATS_TABLE_H_ |