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Issue 395913006: High resolution timer fix for Windows (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: real fixes for review Created 6 years, 5 months ago
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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 "base/pending_task.h" 5 #include "base/pending_task.h"
6 6
7 #include "base/tracked_objects.h" 7 #include "base/tracked_objects.h"
8 8
9 namespace base { 9 namespace base {
10 10
11 #if _MSC_VER >= 1700
12 // This a temporary fix for compiling on VS2012. http://crbug.com/154744
13 PendingTask::PendingTask() : sequence_num(-1), nestable(false) {
14 }
15 #endif
16
17 PendingTask::PendingTask(const tracked_objects::Location& posted_from, 11 PendingTask::PendingTask(const tracked_objects::Location& posted_from,
18 const base::Closure& task) 12 const base::Closure& task)
19 : base::TrackingInfo(posted_from, TimeTicks()), 13 : base::TrackingInfo(posted_from, TimeTicks()),
20 task(task), 14 task(task),
21 posted_from(posted_from), 15 posted_from(posted_from),
22 sequence_num(0), 16 sequence_num(0),
23 nestable(true) { 17 nestable(true),
18 is_high_res(false) {
24 } 19 }
25 20
26 PendingTask::PendingTask(const tracked_objects::Location& posted_from, 21 PendingTask::PendingTask(const tracked_objects::Location& posted_from,
27 const base::Closure& task, 22 const base::Closure& task,
28 TimeTicks delayed_run_time, 23 TimeTicks delayed_run_time,
29 bool nestable) 24 bool nestable)
30 : base::TrackingInfo(posted_from, delayed_run_time), 25 : base::TrackingInfo(posted_from, delayed_run_time),
31 task(task), 26 task(task),
32 posted_from(posted_from), 27 posted_from(posted_from),
33 sequence_num(0), 28 sequence_num(0),
34 nestable(nestable) { 29 nestable(nestable),
30 is_high_res(false) {
35 } 31 }
36 32
37 PendingTask::~PendingTask() { 33 PendingTask::~PendingTask() {
38 } 34 }
39 35
40 bool PendingTask::operator<(const PendingTask& other) const { 36 bool PendingTask::operator<(const PendingTask& other) const {
41 // Since the top of a priority queue is defined as the "greatest" element, we 37 // Since the top of a priority queue is defined as the "greatest" element, we
42 // need to invert the comparison here. We want the smaller time to be at the 38 // need to invert the comparison here. We want the smaller time to be at the
43 // top of the heap. 39 // top of the heap.
44 40
45 if (delayed_run_time < other.delayed_run_time) 41 if (delayed_run_time < other.delayed_run_time)
46 return false; 42 return false;
47 43
48 if (delayed_run_time > other.delayed_run_time) 44 if (delayed_run_time > other.delayed_run_time)
49 return true; 45 return true;
50 46
51 // If the times happen to match, then we use the sequence number to decide. 47 // If the times happen to match, then we use the sequence number to decide.
52 // Compare the difference to support integer roll-over. 48 // Compare the difference to support integer roll-over.
53 return (sequence_num - other.sequence_num) > 0; 49 return (sequence_num - other.sequence_num) > 0;
54 } 50 }
55 51
56 void TaskQueue::Swap(TaskQueue* queue) { 52 void TaskQueue::Swap(TaskQueue* queue) {
57 c.swap(queue->c); // Calls std::deque::swap. 53 c.swap(queue->c); // Calls std::deque::swap.
58 } 54 }
59 55
60 } // namespace base 56 } // namespace base
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