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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 // | |
| 5 // QuicBandwidth represents a bandwidth, stored in bits per second resolution. | |
| 6 | |
| 7 #ifndef NET_QUIC_QUIC_BANDWIDTH_H_ | |
| 8 #define NET_QUIC_QUIC_BANDWIDTH_H_ | |
| 9 | |
| 10 #include "base/basictypes.h" | |
| 11 #include "net/quic/quic_time.h" | |
| 12 | |
| 13 namespace net { | |
| 14 | |
| 15 typedef uint64 QuicByteCount; | |
| 16 typedef uint64 QuicPacketCount; | |
| 17 | |
| 18 class NET_EXPORT_PRIVATE QuicBandwidth { | |
| 19 public: | |
| 20 // Creates a new QuicBandwidth with an internal value of 0. | |
| 21 static QuicBandwidth Zero(); | |
| 22 | |
| 23 // Create a new QuicBandwidth holding the bits per second. | |
| 24 static QuicBandwidth FromBitsPerSecond(int64 bits_per_second); | |
| 25 | |
| 26 // Create a new QuicBandwidth holding the kilo bits per second. | |
| 27 static QuicBandwidth FromKBitsPerSecond(int64 k_bits_per_second); | |
| 28 | |
| 29 // Create a new QuicBandwidth holding the bytes per second. | |
| 30 static QuicBandwidth FromBytesPerSecond(int64 bytes_per_second); | |
| 31 | |
| 32 // Create a new QuicBandwidth holding the kilo bytes per second. | |
| 33 static QuicBandwidth FromKBytesPerSecond(int64 k_bytes_per_second); | |
| 34 | |
| 35 // Create a new QuicBandwidth based on the bytes per the elapsed delta. | |
| 36 static QuicBandwidth FromBytesAndTimeDelta(QuicByteCount bytes, | |
| 37 QuicTime::Delta delta); | |
| 38 | |
| 39 int64 ToBitsPerSecond() const; | |
| 40 | |
| 41 int64 ToKBitsPerSecond() const; | |
| 42 | |
| 43 int64 ToBytesPerSecond() const; | |
| 44 | |
| 45 int64 ToKBytesPerSecond() const; | |
| 46 | |
| 47 QuicByteCount ToBytesPerPeriod(QuicTime::Delta time_period) const; | |
| 48 | |
| 49 int64 ToKBytesPerPeriod(QuicTime::Delta time_period) const; | |
| 50 | |
| 51 bool IsZero() const; | |
| 52 | |
| 53 QuicBandwidth Add(const QuicBandwidth& delta) const; | |
| 54 | |
| 55 QuicBandwidth Subtract(const QuicBandwidth& delta) const; | |
| 56 | |
| 57 QuicBandwidth Scale(float scale_factor) const; | |
| 58 | |
| 59 QuicTime::Delta TransferTime(QuicByteCount bytes) const; | |
| 60 | |
| 61 private: | |
| 62 explicit QuicBandwidth(int64 bits_per_second); | |
| 63 int64 bits_per_second_; | |
| 64 }; | |
| 65 | |
| 66 // Non-member relational operators for QuicBandwidth. | |
| 67 inline bool operator==(QuicBandwidth lhs, QuicBandwidth rhs) { | |
| 68 return lhs.ToBitsPerSecond() == rhs.ToBitsPerSecond(); | |
| 69 } | |
| 70 inline bool operator!=(QuicBandwidth lhs, QuicBandwidth rhs) { | |
| 71 return !(lhs == rhs); | |
| 72 } | |
| 73 inline bool operator<(QuicBandwidth lhs, QuicBandwidth rhs) { | |
| 74 return lhs.ToBitsPerSecond() < rhs.ToBitsPerSecond(); | |
| 75 } | |
| 76 inline bool operator>(QuicBandwidth lhs, QuicBandwidth rhs) { | |
| 77 return rhs < lhs; | |
| 78 } | |
| 79 inline bool operator<=(QuicBandwidth lhs, QuicBandwidth rhs) { | |
| 80 return !(rhs < lhs); | |
| 81 } | |
| 82 inline bool operator>=(QuicBandwidth lhs, QuicBandwidth rhs) { | |
| 83 return !(lhs < rhs); | |
| 84 } | |
| 85 | |
| 86 } // namespace net | |
| 87 #endif // NET_QUIC_QUIC_BANDWIDTH_H_ | |
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