chromium/third_party/perfetto/src/trace_processor/sqlite/sqlite_engine.h

/*
 * Copyright (C) 2023 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_SQLITE_ENGINE_H_
#define SRC_TRACE_PROCESSOR_SQLITE_SQLITE_ENGINE_H_

#include <sqlite3.h>
#include <cstddef>
#include <cstdint>
#include <memory>
#include <optional>
#include <string>
#include <type_traits>
#include <utility>

#include "perfetto/base/logging.h"
#include "perfetto/base/status.h"
#include "perfetto/ext/base/flat_hash_map.h"
#include "perfetto/ext/base/hash.h"
#include "src/trace_processor/sqlite/bindings/sqlite_module.h"
#include "src/trace_processor/sqlite/scoped_db.h"
#include "src/trace_processor/sqlite/sql_source.h"

namespace perfetto::trace_processor {

// Wrapper class around SQLite C API.
//
// The goal of this class is to provide a one-stop-shop mechanism to use SQLite.
// Benefits of this include:
// 1) It allows us to add code which intercepts registration of functions
//    and tables and keeps track of this for later lookup.
// 2) Allows easily auditing the SQLite APIs we use making it easy to determine
//    what functionality we rely on.
class SqliteEngine { … };

}  // namespace perfetto::trace_processor

// The rest of this file is just implementation details which we need
// in the header file because it is templated code. We separate it out
// like this to keep the API people actually care about easy to read.

namespace perfetto::trace_processor {

template <typename Module>
void SqliteEngine::RegisterVirtualTableModule(const std::string& module_name,
                                              typename Module::Context* ctx) { … }

template <typename Module>
void SqliteEngine::RegisterVirtualTableModule(
    const std::string& module_name,
    std::unique_ptr<typename Module::Context> ctx) { … }

}  // namespace perfetto::trace_processor

#endif  // SRC_TRACE_PROCESSOR_SQLITE_SQLITE_ENGINE_H_