src/trace_processor/chunked_trace_reader.h

/*
 * 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_CHUNKED_TRACE_READER_H_
#define SRC_TRACE_PROCESSOR_CHUNKED_TRACE_READER_H_

#include <stddef.h>
#include <stdint.h>

#include <memory>

#include "perfetto/trace_processor/basic_types.h"
#include "perfetto/trace_processor/status.h"

namespace perfetto {
namespace trace_processor {

// Base interface for first stage of parsing pipeline
// (JsonTraceParser, ProtoTraceReader).
class ChunkedTraceReader {
 public:
  virtual ~ChunkedTraceReader();

  // Pushes more data into the trace parser. There is no requirement for the
  // caller to match line/protos boundaries. The parser class has to deal with
  // intermediate buffering lines/protos that span across different chunks.
  // The buffer size is guaranteed to be > 0.
  virtual util::Status Parse(std::unique_ptr<uint8_t[]>, size_t) = 0;

  // Called after the last Parse() call.
  virtual void NotifyEndOfFile() = 0;
};

}  // namespace trace_processor
}  // namespace perfetto

#endif  // SRC_TRACE_PROCESSOR_CHUNKED_TRACE_READER_H_