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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_DATA_USAGE_CORE_DATA_USE_AMORTIZER_H_
#define COMPONENTS_DATA_USAGE_CORE_DATA_USE_AMORTIZER_H_
#include <stdint.h>
#include <memory>
#include "base/callback.h"
namespace data_usage {
struct DataUse;
// Class that takes in DataUse and amortizes any extra data usage overhead
// across DataUse objects.
class DataUseAmortizer {
public:
typedef base::Callback<void(std::unique_ptr<DataUse>)>
AmortizationCompleteCallback;
virtual ~DataUseAmortizer() {}
// Amortizes overhead into |data_use|, then passes the it to |callback| once
// amortization is complete. Amortizers that perform buffering may combine
// together |data_use| objects with the same |callback| if the |data_use|
// objects are identical in all ways but their byte counts.
virtual void AmortizeDataUse(
std::unique_ptr<DataUse> data_use,
const AmortizationCompleteCallback& callback) = 0;
// Notifies the DataUseAmortizer that some extra bytes have been transferred
// that aren't associated with any DataUse objects (e.g. off-the-record
// traffic).
virtual void OnExtraBytes(int64_t extra_tx_bytes, int64_t extra_rx_bytes) = 0;
};
} // namespace data_usage
#endif // COMPONENTS_DATA_USAGE_CORE_DATA_USE_AMORTIZER_H_
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