chromium/third_party/perfetto/src/trace_processor/db/column/data_layer.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_DB_COLUMN_DATA_LAYER_H_
#define SRC_TRACE_PROCESSOR_DB_COLUMN_DATA_LAYER_H_

#include <cstdint>
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include <vector>

#include "perfetto/base/logging.h"
#include "perfetto/public/compiler.h"
#include "perfetto/trace_processor/basic_types.h"
#include "perfetto/trace_processor/ref_counted.h"
#include "src/trace_processor/db/column/types.h"

namespace perfetto::trace_processor::column {
class DataLayerChain;

// Data structure which either directly or indirectly (i.e. by transforming
// the contents of another DataLayer) provides the data of a column of a
// table.
class DataLayer : public RefCounted { … };

// Corresponds to a series of DataLayer chained together. Provides
// functionality for querying the transformed data of the entire chain.
class DataLayerChain { … };

}  // namespace perfetto::trace_processor::column

#endif  // SRC_TRACE_PROCESSOR_DB_COLUMN_DATA_LAYER_H_