chromium/third_party/perfetto/src/trace_processor/db/column_storage.h

/*
 * Copyright (C) 2022 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_STORAGE_H_
#define SRC_TRACE_PROCESSOR_DB_COLUMN_STORAGE_H_

#include <cstddef>
#include <cstdint>
#include <optional>
#include <vector>

#include "perfetto/base/compiler.h"
#include "perfetto/base/logging.h"
#include "perfetto/public/compiler.h"
#include "src/trace_processor/containers/bit_vector.h"

namespace perfetto::trace_processor {

// Base class for allowing type erasure when defining plug-in implementations
// of backing storage for columns.
class ColumnStorageBase { … };

// Class used for implementing storage for non-null columns.
template <typename T>
class ColumnStorage final : public ColumnStorageBase { … };

// Class used for implementing storage for nullable columns.
ColumnStorage<std::optional<T>>;

}  // namespace perfetto::trace_processor

#endif  // SRC_TRACE_PROCESSOR_DB_COLUMN_STORAGE_H_