OLD | NEW |
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 #ifndef BASE_PROFILER_TRACKED_TIME_H_ | 5 #ifndef BASE_PROFILER_TRACKED_TIME_H_ |
6 #define BASE_PROFILER_TRACKED_TIME_H_ | 6 #define BASE_PROFILER_TRACKED_TIME_H_ |
7 | 7 |
8 | 8 |
9 #include "base/base_export.h" | 9 #include "base/base_export.h" |
10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
11 #include "base/time.h" | 11 #include "base/time/time.h" |
12 | 12 |
13 namespace tracked_objects { | 13 namespace tracked_objects { |
14 | 14 |
15 //------------------------------------------------------------------------------ | 15 //------------------------------------------------------------------------------ |
16 | 16 |
17 // TimeTicks maintains a wasteful 64 bits of data (we need less than 32), and on | 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 | 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 | 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 | 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). | 21 // up to 49 days (range), or 24 days (non-negative time durations). |
(...skipping 40 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
62 friend class Duration; | 62 friend class Duration; |
63 explicit TrackedTime(int32 ms); | 63 explicit TrackedTime(int32 ms); |
64 | 64 |
65 // Internal duration is stored directly in milliseconds. | 65 // Internal duration is stored directly in milliseconds. |
66 uint32 ms_; | 66 uint32 ms_; |
67 }; | 67 }; |
68 | 68 |
69 } // namespace tracked_objects | 69 } // namespace tracked_objects |
70 | 70 |
71 #endif // BASE_PROFILER_TRACKED_TIME_H_ | 71 #endif // BASE_PROFILER_TRACKED_TIME_H_ |
OLD | NEW |