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Side by Side Diff: base/task_scheduler/scheduler_thread_pool.h

Issue 2068853002: Rename SchedulerThreadPool* to SchedulerWorkerPool* (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@rename1
Patch Set: CR Feedback fdoray@ Created 4 years, 6 months ago
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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 #ifndef BASE_TASK_SCHEDULER_SCHEDULER_THREAD_POOL_H_
6 #define BASE_TASK_SCHEDULER_SCHEDULER_THREAD_POOL_H_
7
8 #include <memory>
9
10 #include "base/base_export.h"
11 #include "base/memory/ref_counted.h"
12 #include "base/task_runner.h"
13 #include "base/task_scheduler/sequence.h"
14 #include "base/task_scheduler/task.h"
15 #include "base/task_scheduler/task_traits.h"
16
17 namespace base {
18 namespace internal {
19
20 class SchedulerWorkerThread;
21 class SequenceSortKey;
22
23 // Interface for a thread pool.
24 class BASE_EXPORT SchedulerThreadPool {
25 public:
26 virtual ~SchedulerThreadPool() = default;
27
28 // Returns a TaskRunner whose PostTask invocations will result in scheduling
29 // Tasks with |traits| and |execution_mode| in this SchedulerThreadPool.
30 virtual scoped_refptr<TaskRunner> CreateTaskRunnerWithTraits(
31 const TaskTraits& traits,
32 ExecutionMode execution_mode) = 0;
33
34 // Inserts |sequence| with |sequence_sort_key| into a queue of Sequences that
35 // can be processed by any worker thread owned by this SchedulerThreadPool.
36 // Must only be used to put |sequence| back into a queue after running a Task
37 // from it. The thread that calls this doesn't have to belong to this
38 // SchedulerThreadPool.
39 virtual void ReEnqueueSequence(scoped_refptr<Sequence> sequence,
40 const SequenceSortKey& sequence_sort_key) = 0;
41
42 // Posts |task| to be executed by this SchedulerThreadPool as part of
43 // |sequence|. If |worker_thread| is non-null, |task| will be scheduled to run
44 // on it specifically (note: |worker_thread| must be owned by this
45 // SchedulerThreadPool); otherwise, |task| will be added to the pending shared
46 // work. |task| won't be executed before its delayed run time, if any. Returns
47 // true if |task| is posted.
48 virtual bool PostTaskWithSequence(std::unique_ptr<Task> task,
49 scoped_refptr<Sequence> sequence,
50 SchedulerWorkerThread* worker_thread) = 0;
51
52 // Posts |task| to be executed by this SchedulerThreadPool as part of
53 // |sequence|. If |worker_thread| is non-null, |task| will be scheduled to run
54 // on it specifically (note: |worker_thread| must be owned by this
55 // SchedulerThreadPool); otherwise, |task| will be added to the pending shared
56 // work. This must only be called after |task| has gone through
57 // PostTaskWithSequence() and after |task|'s delayed run time.
58 virtual void PostTaskWithSequenceNow(
59 std::unique_ptr<Task> task,
60 scoped_refptr<Sequence> sequence,
61 SchedulerWorkerThread* worker_thread) = 0;
62 };
63
64 } // namespace internal
65 } // namespace base
66
67 #endif // BASE_TASK_SCHEDULER_SCHEDULER_THREAD_POOL_H_
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