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Side by Side Diff: src/base/platform/time.h

Issue 1088993003: Replace OVERRIDE->override and FINAL->final since we now require C++11. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 8 months ago
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1 // Copyright 2013 the V8 project authors. All rights reserved. 1 // Copyright 2013 the V8 project 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 #ifndef V8_BASE_PLATFORM_TIME_H_ 5 #ifndef V8_BASE_PLATFORM_TIME_H_
6 #define V8_BASE_PLATFORM_TIME_H_ 6 #define V8_BASE_PLATFORM_TIME_H_
7 7
8 #include <ctime> 8 #include <ctime>
9 #include <iosfwd> 9 #include <iosfwd>
10 #include <limits> 10 #include <limits>
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24 24
25 class Time; 25 class Time;
26 class TimeTicks; 26 class TimeTicks;
27 27
28 // ----------------------------------------------------------------------------- 28 // -----------------------------------------------------------------------------
29 // TimeDelta 29 // TimeDelta
30 // 30 //
31 // This class represents a duration of time, internally represented in 31 // This class represents a duration of time, internally represented in
32 // microseonds. 32 // microseonds.
33 33
34 class TimeDelta FINAL { 34 class TimeDelta final {
35 public: 35 public:
36 TimeDelta() : delta_(0) {} 36 TimeDelta() : delta_(0) {}
37 37
38 // Converts units of time to TimeDeltas. 38 // Converts units of time to TimeDeltas.
39 static TimeDelta FromDays(int days); 39 static TimeDelta FromDays(int days);
40 static TimeDelta FromHours(int hours); 40 static TimeDelta FromHours(int hours);
41 static TimeDelta FromMinutes(int minutes); 41 static TimeDelta FromMinutes(int minutes);
42 static TimeDelta FromSeconds(int64_t seconds); 42 static TimeDelta FromSeconds(int64_t seconds);
43 static TimeDelta FromMilliseconds(int64_t milliseconds); 43 static TimeDelta FromMilliseconds(int64_t milliseconds);
44 static TimeDelta FromMicroseconds(int64_t microseconds) { 44 static TimeDelta FromMicroseconds(int64_t microseconds) {
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152 int64_t delta_; 152 int64_t delta_;
153 }; 153 };
154 154
155 155
156 // ----------------------------------------------------------------------------- 156 // -----------------------------------------------------------------------------
157 // Time 157 // Time
158 // 158 //
159 // This class represents an absolute point in time, internally represented as 159 // This class represents an absolute point in time, internally represented as
160 // microseconds (s/1,000,000) since 00:00:00 UTC, January 1, 1970. 160 // microseconds (s/1,000,000) since 00:00:00 UTC, January 1, 1970.
161 161
162 class Time FINAL { 162 class Time final {
163 public: 163 public:
164 static const int64_t kMillisecondsPerSecond = 1000; 164 static const int64_t kMillisecondsPerSecond = 1000;
165 static const int64_t kMicrosecondsPerMillisecond = 1000; 165 static const int64_t kMicrosecondsPerMillisecond = 1000;
166 static const int64_t kMicrosecondsPerSecond = kMicrosecondsPerMillisecond * 166 static const int64_t kMicrosecondsPerSecond = kMicrosecondsPerMillisecond *
167 kMillisecondsPerSecond; 167 kMillisecondsPerSecond;
168 static const int64_t kMicrosecondsPerMinute = kMicrosecondsPerSecond * 60; 168 static const int64_t kMicrosecondsPerMinute = kMicrosecondsPerSecond * 60;
169 static const int64_t kMicrosecondsPerHour = kMicrosecondsPerMinute * 60; 169 static const int64_t kMicrosecondsPerHour = kMicrosecondsPerMinute * 60;
170 static const int64_t kMicrosecondsPerDay = kMicrosecondsPerHour * 24; 170 static const int64_t kMicrosecondsPerDay = kMicrosecondsPerHour * 24;
171 static const int64_t kMicrosecondsPerWeek = kMicrosecondsPerDay * 7; 171 static const int64_t kMicrosecondsPerWeek = kMicrosecondsPerDay * 7;
172 static const int64_t kNanosecondsPerMicrosecond = 1000; 172 static const int64_t kNanosecondsPerMicrosecond = 1000;
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291 // ----------------------------------------------------------------------------- 291 // -----------------------------------------------------------------------------
292 // TimeTicks 292 // TimeTicks
293 // 293 //
294 // This class represents an abstract time that is most of the time incrementing 294 // This class represents an abstract time that is most of the time incrementing
295 // for use in measuring time durations. It is internally represented in 295 // for use in measuring time durations. It is internally represented in
296 // microseconds. It can not be converted to a human-readable time, but is 296 // microseconds. It can not be converted to a human-readable time, but is
297 // guaranteed not to decrease (if the user changes the computer clock, 297 // guaranteed not to decrease (if the user changes the computer clock,
298 // Time::Now() may actually decrease or jump). But note that TimeTicks may 298 // Time::Now() may actually decrease or jump). But note that TimeTicks may
299 // "stand still", for example if the computer suspended. 299 // "stand still", for example if the computer suspended.
300 300
301 class TimeTicks FINAL { 301 class TimeTicks final {
302 public: 302 public:
303 TimeTicks() : ticks_(0) {} 303 TimeTicks() : ticks_(0) {}
304 304
305 // Platform-dependent tick count representing "right now." 305 // Platform-dependent tick count representing "right now."
306 // The resolution of this clock is ~1-15ms. Resolution varies depending 306 // The resolution of this clock is ~1-15ms. Resolution varies depending
307 // on hardware/operating system configuration. 307 // on hardware/operating system configuration.
308 // This method never returns a null TimeTicks. 308 // This method never returns a null TimeTicks.
309 static TimeTicks Now(); 309 static TimeTicks Now();
310 310
311 // Returns a platform-dependent high-resolution tick count. Implementation 311 // Returns a platform-dependent high-resolution tick count. Implementation
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394 int64_t ticks_; 394 int64_t ticks_;
395 }; 395 };
396 396
397 inline TimeTicks operator+(const TimeDelta& delta, const TimeTicks& ticks) { 397 inline TimeTicks operator+(const TimeDelta& delta, const TimeTicks& ticks) {
398 return ticks + delta; 398 return ticks + delta;
399 } 399 }
400 400
401 } } // namespace v8::base 401 } } // namespace v8::base
402 402
403 #endif // V8_BASE_PLATFORM_TIME_H_ 403 #endif // V8_BASE_PLATFORM_TIME_H_
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