chromium/third_party/perfetto/src/tracing/core/patch_list.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_TRACING_CORE_PATCH_LIST_H_
#define SRC_TRACING_CORE_PATCH_LIST_H_

#include <array>
#include <forward_list>

#include "perfetto/base/logging.h"
#include "perfetto/ext/tracing/core/basic_types.h"
#include "perfetto/ext/tracing/core/shared_memory_abi.h"

namespace perfetto {

// Used to handle the backfilling of the headers (the |size_field|) of nested
// messages when a proto is fragmented over several chunks. These patches are
// sent out-of-band to the tracing service, after having returned the initial
// chunks of the fragment.
// TODO(crbug.com/904477): Re-disable the move constructors when all usses of
// this class have been fixed.
class Patch { … };

// Note: the protozero::Message(s) will take pointers to the |size_field| of
// these entries. This container must guarantee that the Patch objects are never
// moved around (i.e. cannot be a vector because of reallocations can change
// addresses of pre-existing entries).
class PatchList { … };

}  // namespace perfetto

#endif  // SRC_TRACING_CORE_PATCH_LIST_H_