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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/time/time.h" | 5 #include "base/time/time.h" |
6 | 6 |
7 #include <CoreFoundation/CFDate.h> | 7 #include <CoreFoundation/CFDate.h> |
8 #include <CoreFoundation/CFTimeZone.h> | 8 #include <CoreFoundation/CFTimeZone.h> |
9 #include <mach/mach.h> | 9 #include <mach/mach.h> |
10 #include <mach/mach_time.h> | 10 #include <mach/mach_time.h> |
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128 // static | 128 // static |
129 const int64 Time::kTimeTToMicrosecondsOffset = kWindowsEpochDeltaMicroseconds; | 129 const int64 Time::kTimeTToMicrosecondsOffset = kWindowsEpochDeltaMicroseconds; |
130 | 130 |
131 // static | 131 // static |
132 Time Time::Now() { | 132 Time Time::Now() { |
133 return FromCFAbsoluteTime(CFAbsoluteTimeGetCurrent()); | 133 return FromCFAbsoluteTime(CFAbsoluteTimeGetCurrent()); |
134 } | 134 } |
135 | 135 |
136 // static | 136 // static |
137 Time Time::FromCFAbsoluteTime(CFAbsoluteTime t) { | 137 Time Time::FromCFAbsoluteTime(CFAbsoluteTime t) { |
138 COMPILE_ASSERT(std::numeric_limits<CFAbsoluteTime>::has_infinity, | 138 static_assert(std::numeric_limits<CFAbsoluteTime>::has_infinity, |
139 numeric_limits_infinity_is_undefined_when_not_has_infinity); | 139 "CFAbsoluteTime must have an infinity value"); |
140 if (t == 0) | 140 if (t == 0) |
141 return Time(); // Consider 0 as a null Time. | 141 return Time(); // Consider 0 as a null Time. |
142 if (t == std::numeric_limits<CFAbsoluteTime>::infinity()) | 142 if (t == std::numeric_limits<CFAbsoluteTime>::infinity()) |
143 return Max(); | 143 return Max(); |
144 return Time(static_cast<int64>( | 144 return Time(static_cast<int64>( |
145 (t + kCFAbsoluteTimeIntervalSince1970) * kMicrosecondsPerSecond) + | 145 (t + kCFAbsoluteTimeIntervalSince1970) * kMicrosecondsPerSecond) + |
146 kWindowsEpochDeltaMicroseconds); | 146 kWindowsEpochDeltaMicroseconds); |
147 } | 147 } |
148 | 148 |
149 CFAbsoluteTime Time::ToCFAbsoluteTime() const { | 149 CFAbsoluteTime Time::ToCFAbsoluteTime() const { |
150 COMPILE_ASSERT(std::numeric_limits<CFAbsoluteTime>::has_infinity, | 150 static_assert(std::numeric_limits<CFAbsoluteTime>::has_infinity, |
151 numeric_limits_infinity_is_undefined_when_not_has_infinity); | 151 "CFAbsoluteTime must have an infinity value"); |
152 if (is_null()) | 152 if (is_null()) |
153 return 0; // Consider 0 as a null Time. | 153 return 0; // Consider 0 as a null Time. |
154 if (is_max()) | 154 if (is_max()) |
155 return std::numeric_limits<CFAbsoluteTime>::infinity(); | 155 return std::numeric_limits<CFAbsoluteTime>::infinity(); |
156 return (static_cast<CFAbsoluteTime>(us_ - kWindowsEpochDeltaMicroseconds) / | 156 return (static_cast<CFAbsoluteTime>(us_ - kWindowsEpochDeltaMicroseconds) / |
157 kMicrosecondsPerSecond) - kCFAbsoluteTimeIntervalSince1970; | 157 kMicrosecondsPerSecond) - kCFAbsoluteTimeIntervalSince1970; |
158 } | 158 } |
159 | 159 |
160 // static | 160 // static |
161 Time Time::NowFromSystemTime() { | 161 Time Time::NowFromSystemTime() { |
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225 bool TimeTicks::IsHighResolution() { | 225 bool TimeTicks::IsHighResolution() { |
226 return true; | 226 return true; |
227 } | 227 } |
228 | 228 |
229 // static | 229 // static |
230 ThreadTicks ThreadTicks::Now() { | 230 ThreadTicks ThreadTicks::Now() { |
231 return ThreadTicks(ComputeThreadTicks()); | 231 return ThreadTicks(ComputeThreadTicks()); |
232 } | 232 } |
233 | 233 |
234 } // namespace base | 234 } // namespace base |
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