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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2008 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 // Time represents an absolute point in time, internally represented as | 5 // Time represents an absolute point in time, internally represented as |
6 // microseconds (s/1,000,000) since a platform-dependent epoch. Each | 6 // microseconds (s/1,000,000) since a platform-dependent epoch. Each |
7 // platform's epoch, along with other system-dependent clock interface | 7 // platform's epoch, along with other system-dependent clock interface |
8 // routines, is defined in time_PLATFORM.cc. | 8 // routines, is defined in time_PLATFORM.cc. |
9 // | 9 // |
10 // TimeDelta represents a duration of time, internally represented in | 10 // TimeDelta represents a duration of time, internally represented in |
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171 static const int64 kMicrosecondsPerSecond = kMicrosecondsPerMillisecond * | 171 static const int64 kMicrosecondsPerSecond = kMicrosecondsPerMillisecond * |
172 kMillisecondsPerSecond; | 172 kMillisecondsPerSecond; |
173 static const int64 kMicrosecondsPerMinute = kMicrosecondsPerSecond * 60; | 173 static const int64 kMicrosecondsPerMinute = kMicrosecondsPerSecond * 60; |
174 static const int64 kMicrosecondsPerHour = kMicrosecondsPerMinute * 60; | 174 static const int64 kMicrosecondsPerHour = kMicrosecondsPerMinute * 60; |
175 static const int64 kMicrosecondsPerDay = kMicrosecondsPerHour * 24; | 175 static const int64 kMicrosecondsPerDay = kMicrosecondsPerHour * 24; |
176 static const int64 kMicrosecondsPerWeek = kMicrosecondsPerDay * 7; | 176 static const int64 kMicrosecondsPerWeek = kMicrosecondsPerDay * 7; |
177 static const int64 kNanosecondsPerMicrosecond = 1000; | 177 static const int64 kNanosecondsPerMicrosecond = 1000; |
178 static const int64 kNanosecondsPerSecond = kNanosecondsPerMicrosecond * | 178 static const int64 kNanosecondsPerSecond = kNanosecondsPerMicrosecond * |
179 kMicrosecondsPerSecond; | 179 kMicrosecondsPerSecond; |
180 | 180 |
| 181 #if !defined(OS_WIN) |
| 182 // On Mac & Linux, this value is the delta from the Windows epoch of 1601 to |
| 183 // the Posix delta of 1970. This is used for migrating between the old |
| 184 // 1970-based epochs to the new 1601-based ones. It should be removed from |
| 185 // this global header and put in the platform-specific ones when we remove the |
| 186 // migration code. |
| 187 static const int64 kWindowsEpochDeltaMicroseconds; |
| 188 #endif |
| 189 |
181 // Represents an exploded time that can be formatted nicely. This is kind of | 190 // Represents an exploded time that can be formatted nicely. This is kind of |
182 // like the Win32 SYSTEMTIME structure or the Unix "struct tm" with a few | 191 // like the Win32 SYSTEMTIME structure or the Unix "struct tm" with a few |
183 // additions and changes to prevent errors. | 192 // additions and changes to prevent errors. |
184 struct Exploded { | 193 struct Exploded { |
185 int year; // Four digit year "2007" | 194 int year; // Four digit year "2007" |
186 int month; // 1-based month (values 1 = January, etc.) | 195 int month; // 1-based month (values 1 = January, etc.) |
187 int day_of_week; // 0-based day of week (0 = Sunday, etc.) | 196 int day_of_week; // 0-based day of week (0 = Sunday, etc.) |
188 int day_of_month; // 1-based day of month (1-31) | 197 int day_of_month; // 1-based day of month (1-31) |
189 int hour; // Hour within the current day (0-23) | 198 int hour; // Hour within the current day (0-23) |
190 int minute; // Minute within the current hour (0-59) | 199 int minute; // Minute within the current hour (0-59) |
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482 #endif | 491 #endif |
483 }; | 492 }; |
484 | 493 |
485 inline TimeTicks TimeDelta::operator+(TimeTicks t) const { | 494 inline TimeTicks TimeDelta::operator+(TimeTicks t) const { |
486 return TimeTicks(t.ticks_ + delta_); | 495 return TimeTicks(t.ticks_ + delta_); |
487 } | 496 } |
488 | 497 |
489 } // namespace base | 498 } // namespace base |
490 | 499 |
491 #endif // BASE_TIME_H_ | 500 #endif // BASE_TIME_H_ |
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