OLD | NEW |
1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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 "chrome/browser/metrics/tracking_synchronizer.h" | 5 #include "chrome/browser/metrics/tracking_synchronizer.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/json/json_reader.h" | 8 #include "base/json/json_reader.h" |
9 #include "base/json/json_writer.h" | 9 #include "base/json/json_writer.h" |
10 #include "base/logging.h" | 10 #include "base/logging.h" |
11 #include "base/metrics/histogram.h" | 11 #include "base/metrics/histogram.h" |
12 #include "base/threading/thread.h" | 12 #include "base/threading/thread.h" |
13 #include "base/tracked_objects.h" | 13 #include "base/tracked_objects.h" |
14 #include "chrome/browser/ui/webui/tracing_ui.h" | 14 #include "chrome/browser/ui/webui/tracing_ui.h" |
15 #include "chrome/common/chrome_constants.h" | 15 #include "chrome/common/chrome_constants.h" |
16 #include "chrome/common/render_messages.h" | 16 #include "chrome/common/render_messages.h" |
17 #include "content/browser/renderer_host/render_process_host.h" | |
18 #include "content/public/browser/browser_thread.h" | 17 #include "content/public/browser/browser_thread.h" |
| 18 #include "content/public/browser/render_process_host.h" |
19 | 19 |
20 using base::TimeTicks; | 20 using base::TimeTicks; |
21 using content::BrowserThread; | 21 using content::BrowserThread; |
22 | 22 |
23 namespace chrome_browser_metrics { | 23 namespace chrome_browser_metrics { |
24 | 24 |
25 // Negative numbers are never used as sequence numbers. We explicitly pick a | 25 // Negative numbers are never used as sequence numbers. We explicitly pick a |
26 // negative number that is "so negative" that even when we add one (as is done | 26 // negative number that is "so negative" that even when we add one (as is done |
27 // when we generated the next sequence number) that it will still be negative. | 27 // when we generated the next sequence number) that it will still be negative. |
28 // We have code that handles wrapping around on an overflow into negative | 28 // We have code that handles wrapping around on an overflow into negative |
(...skipping 233 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
262 // Watch out for wrapping to a negative number. | 262 // Watch out for wrapping to a negative number. |
263 if (last_used_sequence_number_ < 0) | 263 if (last_used_sequence_number_ < 0) |
264 last_used_sequence_number_ = 1; | 264 last_used_sequence_number_ = 1; |
265 return last_used_sequence_number_; | 265 return last_used_sequence_number_; |
266 } | 266 } |
267 | 267 |
268 // static | 268 // static |
269 TrackingSynchronizer* TrackingSynchronizer::tracking_synchronizer_ = NULL; | 269 TrackingSynchronizer* TrackingSynchronizer::tracking_synchronizer_ = NULL; |
270 | 270 |
271 } // namespace chrome_browser_metrics | 271 } // namespace chrome_browser_metrics |
OLD | NEW |