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1 /* | 1 /* |
2 * Copyright 2016 The WebRTC Project Authors. All rights reserved. | 2 * Copyright 2016 The WebRTC Project Authors. All rights reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #ifndef WEBRTC_BASE_TIMEDELTA_H_ | 11 #ifndef WEBRTC_BASE_TIMEDELTA_H_ |
12 #define WEBRTC_BASE_TIMEDELTA_H_ | 12 #define WEBRTC_BASE_TIMEDELTA_H_ |
13 | 13 |
14 #include <stdint.h> | |
15 | 14 |
16 #include "webrtc/base/timeutils.h" | 15 // This header is deprecated and is just left here temporarily during |
17 | 16 // refactoring. See https://bugs.webrtc.org/7634 for more details. |
18 // Convenience class to convert between different units of relative time. | 17 #include "webrtc/rtc_base/timedelta.h" |
19 // Stores time to precision of nanoseconds, as int64_t internally. | |
20 // Doesn't check for overflow/underflow. | |
21 // | |
22 // Based on TimeDelta in: | |
23 // https://code.google.com/p/chromium/codesearch#chromium/src/base/time/time.h | |
24 namespace rtc { | |
25 | |
26 class TimeDelta { | |
27 public: | |
28 TimeDelta() : delta_(0) {} | |
29 | |
30 // Converts units of time to TimeDeltas. | |
31 static constexpr TimeDelta FromSeconds(int64_t secs) { | |
32 return TimeDelta(secs * kNumNanosecsPerSec); | |
33 } | |
34 static constexpr TimeDelta FromMilliseconds(int64_t ms) { | |
35 return TimeDelta(ms * kNumNanosecsPerMillisec); | |
36 } | |
37 static constexpr TimeDelta FromMicroseconds(int64_t us) { | |
38 return TimeDelta(us * kNumNanosecsPerMicrosec); | |
39 } | |
40 static constexpr TimeDelta FromNanoseconds(int64_t ns) { | |
41 return TimeDelta(ns); | |
42 } | |
43 | |
44 // Returns true if the time delta is zero. | |
45 bool is_zero() const { return delta_ == 0; } | |
46 | |
47 // Converts TimeDelta to units of time. | |
48 int64_t ToSeconds() const { return delta_ / kNumNanosecsPerSec; } | |
49 int64_t ToMilliseconds() const { return delta_ / kNumNanosecsPerMillisec; } | |
50 int64_t ToMicroseconds() const { return delta_ / kNumNanosecsPerMicrosec; } | |
51 int64_t ToNanoseconds() const { return delta_; } | |
52 | |
53 TimeDelta& operator=(TimeDelta other) { | |
54 delta_ = other.delta_; | |
55 return *this; | |
56 } | |
57 | |
58 // Computations with other deltas. | |
59 TimeDelta operator+(TimeDelta other) const { | |
60 return TimeDelta(delta_ + other.delta_); | |
61 } | |
62 TimeDelta operator-(TimeDelta other) const { | |
63 return TimeDelta(delta_ + other.delta_); | |
64 } | |
65 | |
66 TimeDelta& operator+=(TimeDelta other) { return *this = (*this + other); } | |
67 TimeDelta& operator-=(TimeDelta other) { return *this = (*this - other); } | |
68 TimeDelta operator-() const { return TimeDelta(-delta_); } | |
69 | |
70 // Computations with numeric types. | |
71 template <typename T> | |
72 TimeDelta operator*(T a) const { | |
73 return TimeDelta(delta_ * a); | |
74 } | |
75 template <typename T> | |
76 TimeDelta operator/(T a) const { | |
77 return TimeDelta(delta_ / a); | |
78 } | |
79 template <typename T> | |
80 TimeDelta& operator*=(T a) { | |
81 return *this = (*this * a); | |
82 } | |
83 template <typename T> | |
84 TimeDelta& operator/=(T a) { | |
85 return *this = (*this / a); | |
86 } | |
87 | |
88 TimeDelta operator%(TimeDelta a) const { | |
89 return TimeDelta(delta_ % a.delta_); | |
90 } | |
91 | |
92 // Comparison operators. | |
93 constexpr bool operator==(TimeDelta other) const { | |
94 return delta_ == other.delta_; | |
95 } | |
96 constexpr bool operator!=(TimeDelta other) const { | |
97 return delta_ != other.delta_; | |
98 } | |
99 constexpr bool operator<(TimeDelta other) const { | |
100 return delta_ < other.delta_; | |
101 } | |
102 constexpr bool operator<=(TimeDelta other) const { | |
103 return delta_ <= other.delta_; | |
104 } | |
105 constexpr bool operator>(TimeDelta other) const { | |
106 return delta_ > other.delta_; | |
107 } | |
108 constexpr bool operator>=(TimeDelta other) const { | |
109 return delta_ >= other.delta_; | |
110 } | |
111 | |
112 private: | |
113 // Constructs a delta given the duration in nanoseconds. This is private | |
114 // to avoid confusion by callers with an integer constructor. Use | |
115 // FromSeconds, FromMilliseconds, etc. instead. | |
116 constexpr explicit TimeDelta(int64_t delta_ns) : delta_(delta_ns) {} | |
117 | |
118 // Delta in nanoseconds. | |
119 int64_t delta_; | |
120 }; | |
121 | |
122 template <typename T> | |
123 inline TimeDelta operator*(T a, TimeDelta td) { | |
124 return td * a; | |
125 } | |
126 | |
127 } // namespace rtc | |
128 | 18 |
129 #endif // WEBRTC_BASE_TIMEDELTA_H_ | 19 #endif // WEBRTC_BASE_TIMEDELTA_H_ |
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