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1 /* | 1 /* |
2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2012 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 |
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58 | 58 |
59 static int64_t TicksToMicroseconds(const int64_t ticks); | 59 static int64_t TicksToMicroseconds(const int64_t ticks); |
60 | 60 |
61 // Returns a TickTime that is ticks later than the passed TickTime. | 61 // Returns a TickTime that is ticks later than the passed TickTime. |
62 friend TickTime operator+(const TickTime lhs, const int64_t ticks); | 62 friend TickTime operator+(const TickTime lhs, const int64_t ticks); |
63 TickTime& operator+=(const int64_t& ticks); | 63 TickTime& operator+=(const int64_t& ticks); |
64 | 64 |
65 // Returns a TickInterval that is the difference in ticks beween rhs and lhs. | 65 // Returns a TickInterval that is the difference in ticks beween rhs and lhs. |
66 friend TickInterval operator-(const TickTime& lhs, const TickTime& rhs); | 66 friend TickInterval operator-(const TickTime& lhs, const TickTime& rhs); |
67 | 67 |
68 // Call to engage the fake clock. This is useful for tests since relying on | |
69 // a real clock often makes the test flaky. | |
70 static void UseFakeClock(int64_t start_millisecond); | |
71 | |
72 // Advance the fake clock. Must be called after UseFakeClock. | |
73 static void AdvanceFakeClock(int64_t milliseconds); | |
74 | |
75 private: | 68 private: |
76 static int64_t QueryOsForTicks(); | 69 static int64_t QueryOsForTicks(); |
77 | 70 |
78 static bool use_fake_clock_; | |
79 static int64_t fake_ticks_; | |
80 | |
81 int64_t ticks_; | 71 int64_t ticks_; |
82 }; | 72 }; |
83 | 73 |
84 // Represents a time delta in ticks. | 74 // Represents a time delta in ticks. |
85 class TickInterval { | 75 class TickInterval { |
86 public: | 76 public: |
87 TickInterval(); | 77 TickInterval(); |
88 explicit TickInterval(int64_t interval); | 78 explicit TickInterval(int64_t interval); |
89 | 79 |
90 int64_t Milliseconds() const; | 80 int64_t Milliseconds() const; |
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159 | 149 |
160 inline TickTime::TickTime() | 150 inline TickTime::TickTime() |
161 : ticks_(0) { | 151 : ticks_(0) { |
162 } | 152 } |
163 | 153 |
164 inline TickTime::TickTime(int64_t ticks) | 154 inline TickTime::TickTime(int64_t ticks) |
165 : ticks_(ticks) { | 155 : ticks_(ticks) { |
166 } | 156 } |
167 | 157 |
168 inline TickTime TickTime::Now() { | 158 inline TickTime TickTime::Now() { |
169 if (use_fake_clock_) | 159 return TickTime(QueryOsForTicks()); |
170 return TickTime(fake_ticks_); | |
171 else | |
172 return TickTime(QueryOsForTicks()); | |
173 } | 160 } |
174 | 161 |
175 inline int64_t TickTime::Ticks() const { | 162 inline int64_t TickTime::Ticks() const { |
176 return ticks_; | 163 return ticks_; |
177 } | 164 } |
178 | 165 |
179 inline TickTime& TickTime::operator+=(const int64_t& ticks) { | 166 inline TickTime& TickTime::operator+=(const int64_t& ticks) { |
180 ticks_ += ticks; | 167 ticks_ += ticks; |
181 return *this; | 168 return *this; |
182 } | 169 } |
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194 } | 181 } |
195 | 182 |
196 inline TickInterval& TickInterval::operator-=(const TickInterval& rhs) { | 183 inline TickInterval& TickInterval::operator-=(const TickInterval& rhs) { |
197 interval_ -= rhs.interval_; | 184 interval_ -= rhs.interval_; |
198 return *this; | 185 return *this; |
199 } | 186 } |
200 | 187 |
201 } // namespace webrtc | 188 } // namespace webrtc |
202 | 189 |
203 #endif // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_TICK_UTIL_H_ | 190 #endif // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_TICK_UTIL_H_ |
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