/* Copyright 2022 The TensorFlow Authors. All Rights Reserved.

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 TENSORFLOW_CORE_DATA_SERVICE_SNAPSHOT_UTILS_H_
#define TENSORFLOW_CORE_DATA_SERVICE_SNAPSHOT_UTILS_H_

#include <cstdint>
#include <vector>

#include "absl/strings/string_view.h"
#include "tensorflow/core/framework/tensor.h"
#include "tensorflow/tsl/platform/status.h"

namespace tensorflow {
namespace data {

int64_t EstimatedSizeBytes(const std::vector<Tensor>& tensors);

// Returns a `Status` that indicates the snapshot stream assignment has changed
// and the worker should retry unless it's cancelled.
Status StreamAssignmentChanged(absl::string_view worker_address,
                               int64_t stream_index);

// Returns true if `status` indicates the snapshot stream assignment has changed
// returned by `StreamAssignmentChanged`.
bool IsStreamAssignmentChanged(const Status& status);

}  // namespace data
}  // namespace tensorflow

#endif  // TENSORFLOW_CORE_DATA_SERVICE_SNAPSHOT_UTILS_H_
