Project import generated by Copybara.
PiperOrigin-RevId: 237361882
Change-Id: I109a68f44db867b20f8c6a7732b0ce657133e52a
diff --git a/quic/core/congestion_control/prr_sender.h b/quic/core/congestion_control/prr_sender.h
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+++ b/quic/core/congestion_control/prr_sender.h
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+// Copyright (c) 2014 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.
+
+// Implements Proportional Rate Reduction (PRR) per RFC 6937.
+
+#ifndef QUICHE_QUIC_CORE_CONGESTION_CONTROL_PRR_SENDER_H_
+#define QUICHE_QUIC_CORE_CONGESTION_CONTROL_PRR_SENDER_H_
+
+#include "net/third_party/quiche/src/quic/core/quic_bandwidth.h"
+#include "net/third_party/quiche/src/quic/core/quic_time.h"
+#include "net/third_party/quiche/src/quic/platform/api/quic_export.h"
+
+namespace quic {
+
+class QUIC_EXPORT_PRIVATE PrrSender {
+ public:
+ PrrSender();
+ // OnPacketLost should be called on the first loss that triggers a recovery
+ // period and all other methods in this class should only be called when in
+ // recovery.
+ void OnPacketLost(QuicByteCount prior_in_flight);
+ void OnPacketSent(QuicByteCount sent_bytes);
+ void OnPacketAcked(QuicByteCount acked_bytes);
+ bool CanSend(QuicByteCount congestion_window,
+ QuicByteCount bytes_in_flight,
+ QuicByteCount slowstart_threshold) const;
+
+ private:
+ // Bytes sent and acked since the last loss event.
+ // |bytes_sent_since_loss_| is the same as "prr_out_" in RFC 6937,
+ // and |bytes_delivered_since_loss_| is the same as "prr_delivered_".
+ QuicByteCount bytes_sent_since_loss_;
+ QuicByteCount bytes_delivered_since_loss_;
+ size_t ack_count_since_loss_;
+
+ // The congestion window before the last loss event.
+ QuicByteCount bytes_in_flight_before_loss_;
+};
+
+} // namespace quic
+
+#endif // QUICHE_QUIC_CORE_CONGESTION_CONTROL_PRR_SENDER_H_
