| OLD | NEW |
|---|
| (Empty) |
| 1 // Copyright 2013 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 #include "webkit/browser/fileapi/timed_task_helper.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "base/logging.h" | |
| 9 #include "base/sequenced_task_runner.h" | |
| 10 | |
| 11 namespace storage { | |
| 12 | |
| 13 struct TimedTaskHelper::Tracker { | |
| 14 explicit Tracker(TimedTaskHelper* timer) : timer(timer) {} | |
| 15 | |
| 16 ~Tracker() { | |
| 17 if (timer) | |
| 18 timer->tracker_ = NULL; | |
| 19 } | |
| 20 | |
| 21 TimedTaskHelper* timer; | |
| 22 }; | |
| 23 | |
| 24 TimedTaskHelper::TimedTaskHelper(base::SequencedTaskRunner* task_runner) | |
| 25 : task_runner_(task_runner), | |
| 26 tracker_(NULL) { | |
| 27 } | |
| 28 | |
| 29 TimedTaskHelper::~TimedTaskHelper() { | |
| 30 DCHECK(task_runner_->RunsTasksOnCurrentThread()); | |
| 31 if (tracker_) | |
| 32 tracker_->timer = NULL; | |
| 33 } | |
| 34 | |
| 35 bool TimedTaskHelper::IsRunning() const { | |
| 36 DCHECK(task_runner_->RunsTasksOnCurrentThread()); | |
| 37 return tracker_ != NULL; | |
| 38 } | |
| 39 | |
| 40 void TimedTaskHelper::Start( | |
| 41 const tracked_objects::Location& posted_from, | |
| 42 base::TimeDelta delay, | |
| 43 const base::Closure& user_task) { | |
| 44 posted_from_ = posted_from; | |
| 45 delay_ = delay; | |
| 46 user_task_ = user_task; | |
| 47 Reset(); | |
| 48 } | |
| 49 | |
| 50 void TimedTaskHelper::Reset() { | |
| 51 DCHECK(task_runner_->RunsTasksOnCurrentThread()); | |
| 52 DCHECK(!user_task_.is_null()); | |
| 53 desired_run_time_ = base::TimeTicks::Now() + delay_; | |
| 54 | |
| 55 if (tracker_) | |
| 56 return; | |
| 57 | |
| 58 // Initialize the tracker for the first time. | |
| 59 tracker_ = new Tracker(this); | |
| 60 PostDelayedTask(make_scoped_ptr(tracker_), delay_); | |
| 61 } | |
| 62 | |
| 63 // static | |
| 64 void TimedTaskHelper::Fired(scoped_ptr<Tracker> tracker) { | |
| 65 if (!tracker->timer) | |
| 66 return; | |
| 67 TimedTaskHelper* timer = tracker->timer; | |
| 68 timer->OnFired(tracker.Pass()); | |
| 69 } | |
| 70 | |
| 71 void TimedTaskHelper::OnFired(scoped_ptr<Tracker> tracker) { | |
| 72 DCHECK(task_runner_->RunsTasksOnCurrentThread()); | |
| 73 base::TimeTicks now = base::TimeTicks::Now(); | |
| 74 if (desired_run_time_ > now) { | |
| 75 PostDelayedTask(tracker.Pass(), desired_run_time_ - now); | |
| 76 return; | |
| 77 } | |
| 78 tracker.reset(); | |
| 79 base::Closure task = user_task_; | |
| 80 user_task_.Reset(); | |
| 81 task.Run(); | |
| 82 } | |
| 83 | |
| 84 void TimedTaskHelper::PostDelayedTask(scoped_ptr<Tracker> tracker, | |
| 85 base::TimeDelta delay) { | |
| 86 task_runner_->PostDelayedTask( | |
| 87 posted_from_, | |
| 88 base::Bind(&TimedTaskHelper::Fired, base::Passed(&tracker)), | |
| 89 delay); | |
| 90 } | |
| 91 | |
| 92 } // namespace storage | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 539143002:
Migrate webkit/browser/ to storage/browser/ (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master