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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 <stdint.h> | |
| 11 | |
| 12 #include "base/compiler_specific.h" | |
| 13 #include "net/quic/quic_time.h" | |
| 14 | |
| 15 namespace net { | |
| 16 | |
| 17 typedef uint64_t QuicByteCount; | |
| 18 typedef uint64_t QuicPacketCount; | |
| 19 | |
| 20 class NET_EXPORT_PRIVATE QuicBandwidth { | |
| 21 public: | |
| 22 // Creates a new QuicBandwidth with an internal value of 0. | |
| 23 static QuicBandwidth Zero(); | |
| 24 | |
| 25 // Create a new QuicBandwidth holding the bits per second. | |
| 26 static QuicBandwidth FromBitsPerSecond(int64_t bits_per_second); | |
| 27 | |
| 28 // Create a new QuicBandwidth holding the kilo bits per second. | |
| 29 static QuicBandwidth FromKBitsPerSecond(int64_t k_bits_per_second); | |
| 30 | |
| 31 // Create a new QuicBandwidth holding the bytes per second. | |
| 32 static QuicBandwidth FromBytesPerSecond(int64_t bytes_per_second); | |
| 33 | |
| 34 // Create a new QuicBandwidth holding the kilo bytes per second. | |
| 35 static QuicBandwidth FromKBytesPerSecond(int64_t k_bytes_per_second); | |
| 36 | |
| 37 // Create a new QuicBandwidth based on the bytes per the elapsed delta. | |
| 38 static QuicBandwidth FromBytesAndTimeDelta(QuicByteCount bytes, | |
| 39 QuicTime::Delta delta); | |
| 40 | |
| 41 int64_t ToBitsPerSecond() const; | |
| 42 | |
| 43 int64_t ToKBitsPerSecond() const; | |
| 44 | |
| 45 int64_t ToBytesPerSecond() const; | |
| 46 | |
| 47 int64_t ToKBytesPerSecond() const; | |
| 48 | |
| 49 QuicByteCount ToBytesPerPeriod(QuicTime::Delta time_period) const; | |
| 50 | |
| 51 int64_t ToKBytesPerPeriod(QuicTime::Delta time_period) const; | |
| 52 | |
| 53 bool IsZero() const; | |
| 54 | |
| 55 QuicTime::Delta TransferTime(QuicByteCount bytes) const; | |
| 56 | |
| 57 private: | |
| 58 explicit QuicBandwidth(int64_t bits_per_second); | |
| 59 int64_t bits_per_second_; | |
| 60 | |
| 61 friend QuicBandwidth operator+(QuicBandwidth lhs, QuicBandwidth rhs); | |
| 62 friend QuicBandwidth operator-(QuicBandwidth lhs, QuicBandwidth rhs); | |
| 63 friend QuicBandwidth operator*(QuicBandwidth lhs, float factor); | |
| 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 // Non-member arithmetic operators for QuicBandwidth. | |
| 87 inline QuicBandwidth operator+(QuicBandwidth lhs, QuicBandwidth rhs) { | |
| 88 return QuicBandwidth(lhs.bits_per_second_ + rhs.bits_per_second_); | |
| 89 } | |
| 90 inline QuicBandwidth operator-(QuicBandwidth lhs, QuicBandwidth rhs) { | |
| 91 return QuicBandwidth(lhs.bits_per_second_ - rhs.bits_per_second_); | |
| 92 } | |
| 93 inline QuicBandwidth operator*(QuicBandwidth lhs, float rhs) { | |
| 94 return QuicBandwidth(static_cast<int64_t>(lhs.bits_per_second_ * rhs)); | |
| 95 } | |
| 96 inline QuicBandwidth operator*(float lhs, QuicBandwidth rhs) { | |
| 97 return rhs * lhs; | |
| 98 } | |
| 99 | |
| 100 } // namespace net | |
| 101 #endif // NET_QUIC_QUIC_BANDWIDTH_H_ | |
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