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1 // Copyright 2016 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 "base/task_scheduler/utils.h" | |
6 | |
7 #include <utility> | |
8 | |
9 #include "base/callback.h" | |
10 #include "base/logging.h" | |
11 #include "base/memory/ptr_util.h" | |
12 #include "base/task_scheduler/priority_queue.h" | |
13 #include "base/task_scheduler/scheduler_task_executor.h" | |
14 #include "base/task_scheduler/sequence_sort_key.h" | |
15 #include "base/task_scheduler/task_tracker.h" | |
16 #include "base/time/time.h" | |
17 | |
18 namespace base { | |
19 namespace internal { | |
20 | |
21 bool PostTaskHelper(const tracked_objects::Location& posted_from, | |
22 const Closure& closure, | |
23 const TaskTraits& traits, | |
24 const TimeDelta& delay, | |
25 scoped_refptr<Sequence> sequence, | |
26 SchedulerTaskExecutor* executor, | |
27 TaskTracker* task_tracker) { | |
28 DCHECK(!closure.is_null()); | |
29 DCHECK(sequence); | |
30 DCHECK(executor); | |
31 DCHECK(task_tracker); | |
32 | |
33 // TODO(fdoray): Support delayed tasks. | |
34 DCHECK(delay.is_zero()); | |
35 | |
36 std::unique_ptr<Task> task(new Task(posted_from, closure, traits)); | |
37 | |
38 if (!task_tracker->WillPostTask(task.get())) | |
39 return false; | |
40 | |
41 executor->PostTaskNow(std::move(task), std::move(sequence)); | |
42 return true; | |
43 } | |
44 | |
45 bool PostTaskNowHelper(std::unique_ptr<Task> task, | |
46 scoped_refptr<Sequence> sequence, | |
47 PriorityQueue* priority_queue) { | |
48 DCHECK(task); | |
49 DCHECK(sequence); | |
50 DCHECK(priority_queue); | |
51 | |
52 const bool sequence_was_empty = sequence->PushTask(std::move(task)); | |
danakj
2016/04/14 19:48:58
Is the assumption that Sequence is already in prio
fdoray
2016/04/14 23:46:58
If |sequence| wasn't empty, it is already in a Pri
| |
53 if (sequence_was_empty) { | |
54 // Insert |sequence| in |priority_queue| if it was empty before |task| was | |
55 // inserted into it. When that's not the case, one of these must be true: | |
56 // - |sequence| is already in a PriorityQueue, or, | |
57 // - A worker thread is running a Task from |sequence|. It will insert | |
58 // |sequence| in a PriorityQueue once it's done running the Task. | |
59 const auto sequence_sort_key = sequence->GetSortKey(); | |
60 priority_queue->BeginTransaction()->Push( | |
61 WrapUnique(new PriorityQueue::SequenceAndSortKey(std::move(sequence), | |
62 sequence_sort_key))); | |
63 } | |
64 | |
65 return sequence_was_empty; | |
66 } | |
67 | |
68 } // namespace internal | |
69 } // namespace base | |
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