The Tor Browser / file comparison
comparison: security/sandbox/chromium/base/profiler/tracked_time.h
security/sandbox/chromium/base/profiler/tracked_time.h
- branch
- TOR_BUG_9701
- changeset 9
- a63d609f5ebe
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| -1:000000000000 | 0:94d157cdaaf4 |
|---|---|
| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef BASE_PROFILER_TRACKED_TIME_H_ | |
| 6 #define BASE_PROFILER_TRACKED_TIME_H_ | |
| 7 | |
| 8 | |
| 9 #include "base/base_export.h" | |
| 10 #include "base/basictypes.h" | |
| 11 #include "base/time/time.h" | |
| 12 | |
| 13 namespace tracked_objects { | |
| 14 | |
| 15 //------------------------------------------------------------------------------ | |
| 16 | |
| 17 // TimeTicks maintains a wasteful 64 bits of data (we need less than 32), and on | |
| 18 // windows, a 64 bit timer is expensive to even obtain. We use a simple | |
| 19 // millisecond counter for most of our time values, as well as millisecond units | |
| 20 // of duration between those values. This means we can only handle durations | |
| 21 // up to 49 days (range), or 24 days (non-negative time durations). | |
| 22 // We only define enough methods to service the needs of the tracking classes, | |
| 23 // and our interfaces are modeled after what TimeTicks and TimeDelta use (so we | |
| 24 // can swap them into place if we want to use the "real" classes). | |
| 25 | |
| 26 class BASE_EXPORT Duration { // Similar to base::TimeDelta. | |
| 27 public: | |
| 28 Duration(); | |
| 29 | |
| 30 Duration& operator+=(const Duration& other); | |
| 31 Duration operator+(const Duration& other) const; | |
| 32 | |
| 33 bool operator==(const Duration& other) const; | |
| 34 bool operator!=(const Duration& other) const; | |
| 35 bool operator>(const Duration& other) const; | |
| 36 | |
| 37 static Duration FromMilliseconds(int ms); | |
| 38 | |
| 39 int32 InMilliseconds() const; | |
| 40 | |
| 41 private: | |
| 42 friend class TrackedTime; | |
| 43 explicit Duration(int32 duration); | |
| 44 | |
| 45 // Internal time is stored directly in milliseconds. | |
| 46 int32 ms_; | |
| 47 }; | |
| 48 | |
| 49 class BASE_EXPORT TrackedTime { // Similar to base::TimeTicks. | |
| 50 public: | |
| 51 TrackedTime(); | |
| 52 explicit TrackedTime(const base::TimeTicks& time); | |
| 53 | |
| 54 static TrackedTime Now(); | |
| 55 Duration operator-(const TrackedTime& other) const; | |
| 56 TrackedTime operator+(const Duration& other) const; | |
| 57 bool is_null() const; | |
| 58 | |
| 59 static TrackedTime FromMilliseconds(int32 ms) { return TrackedTime(ms); } | |
| 60 | |
| 61 private: | |
| 62 friend class Duration; | |
| 63 explicit TrackedTime(int32 ms); | |
| 64 | |
| 65 // Internal duration is stored directly in milliseconds. | |
| 66 uint32 ms_; | |
| 67 }; | |
| 68 | |
| 69 } // namespace tracked_objects | |
| 70 | |
| 71 #endif // BASE_PROFILER_TRACKED_TIME_H_ |
