aboutsummaryrefslogtreecommitdiff
path: root/src/trace_processor/sqlite/sql_stats_table.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/trace_processor/sqlite/sql_stats_table.h')
-rw-r--r--src/trace_processor/sqlite/sql_stats_table.h86
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_