Move shared files in net/quic/ into net/quic/core/

net/quic/quic_multipath_transmissions_map.h

-// Copyright (c) 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.
-
-// A map manages packets which are transmitted across multiple paths.
-// For example, a packet is originally transmitted on path 1 with packet number
-// 1. Then this packet is retransmitted on path 2 with packet number 1. (1, 1)
-// and (2, 1) are inserted into this map. Suppose (2, 1) is detected lost and
-// gets retransmitted on path 2 with packet 2. (2, 2) will not be inserted
-// because this transmission does not "across" path compared to (2, 1).
-
-#ifndef NET_QUIC_QUIC_MULTIPATH_TRANSMISSIONS_MAP_H_
-#define NET_QUIC_QUIC_MULTIPATH_TRANSMISSIONS_MAP_H_
-
-#include <deque>
-#include <unordered_map>
-
-#include "base/macros.h"
-#include "net/quic/quic_protocol.h"
-#include "net/quic/quic_utils.h"
-
-namespace net {
-
-typedef std::pair<QuicPathId, QuicPacketNumber> QuicPathIdPacketNumber;
-
-class NET_EXPORT_PRIVATE QuicMultipathTransmissionsMap {
- public:
-  struct QuicPathIdPacketNumberHash {
-    size_t operator()(std::pair<QuicPathId, QuicPacketNumber> value) const {
-      return QuicUtils::PackPathIdAndPacketNumber(value.first, value.second);
-    }
-  };
-
-  typedef std::deque<QuicPathIdPacketNumber> MultipathTransmissionsList;
-  typedef std::unordered_map<QuicPathIdPacketNumber,
-                             MultipathTransmissionsList*,
-                             QuicPathIdPacketNumberHash>
-      MultipathTransmissionsMap;
-
-  QuicMultipathTransmissionsMap();
-  ~QuicMultipathTransmissionsMap();
-
-  // Called when a packet is retransmitted on a different path. Adds both
-  // |original_path_id_packet_number| (if not exists) and
-  // |path_id_packet_number| to |transmission_map_|.
-  void OnPacketRetransmittedOnDifferentPath(
-      QuicPathIdPacketNumber original_path_id_packet_number,
-      QuicPathIdPacketNumber path_id_packet_number);
-
-  // Returns all multipath transmissions list if |path_id_packet_number| has
-  // been transmitted across multiple paths, nullptr otherwise.
-  const MultipathTransmissionsList* MaybeGetTransmissionsOnOtherPaths(
-      QuicPathIdPacketNumber path_id_packet_number) const;
-
-  // Called after packet |path_id_packet_number| is received.
-  // If |path_id_packet_number| has been transmitted across multiple paths,
-  // clears all multipath transmissions list and removes each transmission from
-  // |transmission_map_|, does nothing otherwise.
-  void OnPacketHandled(QuicPathIdPacketNumber path_id_packet_number);
-
- private:
-  // Keys of the map are QuicPathIdPacketNumber, and values are pointers to
-  // lists of multipath transmissions of the same packet. For example, if a
-  // packet has been transmitted as (1, 1) and (2, 1), two entries are added
-  // to this map and both values point to the same list: {(1, 1), (2, 1)}.
-  // The MultipathTransmissionsList is owned by the transmission which is
-  // received first (on any path).
-  MultipathTransmissionsMap transmission_map_;
-};
-
-}  // namespace net
-
-#endif  // NET_QUIC_QUIC_MULTIPATH_TRANSMISSIONS_MAP_H_