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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 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 | 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/task_scheduler/task_scheduler.h" | 5 #include "base/task_scheduler/task_scheduler.h" |
6 | 6 |
| 7 #include <algorithm> |
| 8 |
7 #include "base/bind.h" | 9 #include "base/bind.h" |
8 #include "base/logging.h" | 10 #include "base/logging.h" |
| 11 #include "base/sys_info.h" |
9 #include "base/task_scheduler/scheduler_worker_pool_params.h" | 12 #include "base/task_scheduler/scheduler_worker_pool_params.h" |
10 #include "base/task_scheduler/task_scheduler_impl.h" | 13 #include "base/task_scheduler/task_scheduler_impl.h" |
11 #include "base/threading/platform_thread.h" | 14 #include "base/threading/platform_thread.h" |
12 #include "base/time/time.h" | 15 #include "base/time/time.h" |
13 | 16 |
14 namespace base { | 17 namespace base { |
15 | 18 |
16 namespace { | 19 namespace { |
17 | 20 |
18 // |g_task_scheduler| is intentionally leaked on shutdown. | 21 // |g_task_scheduler| is intentionally leaked on shutdown. |
19 TaskScheduler* g_task_scheduler = nullptr; | 22 TaskScheduler* g_task_scheduler = nullptr; |
20 | 23 |
21 } // namespace | 24 } // namespace |
22 | 25 |
23 // static | 26 // static |
24 void TaskScheduler::CreateAndSetSimpleTaskScheduler(int max_threads) { | 27 void TaskScheduler::CreateAndSetSimpleTaskScheduler(const std::string& name) { |
| 28 constexpr int kMinNumThreads = 1; |
25 std::vector<SchedulerWorkerPoolParams> worker_pool_params_vector; | 29 std::vector<SchedulerWorkerPoolParams> worker_pool_params_vector; |
26 worker_pool_params_vector.emplace_back( | 30 worker_pool_params_vector.emplace_back( |
27 "Simple", ThreadPriority::NORMAL, | 31 name, ThreadPriority::NORMAL, |
28 SchedulerWorkerPoolParams::StandbyThreadPolicy::LAZY, max_threads, | 32 SchedulerWorkerPoolParams::StandbyThreadPolicy::LAZY, |
| 33 std::max(kMinNumThreads, base::SysInfo::NumberOfProcessors()), |
29 TimeDelta::FromSeconds(30)); | 34 TimeDelta::FromSeconds(30)); |
30 CreateAndSetDefaultTaskScheduler( | 35 CreateAndSetDefaultTaskScheduler( |
31 worker_pool_params_vector, | 36 worker_pool_params_vector, |
32 Bind([](const TaskTraits&) -> size_t { return 0; })); | 37 Bind([](const TaskTraits&) -> size_t { return 0; })); |
33 } | 38 } |
34 | 39 |
35 // static | 40 // static |
36 void TaskScheduler::CreateAndSetDefaultTaskScheduler( | 41 void TaskScheduler::CreateAndSetDefaultTaskScheduler( |
37 const std::vector<SchedulerWorkerPoolParams>& worker_pool_params_vector, | 42 const std::vector<SchedulerWorkerPoolParams>& worker_pool_params_vector, |
38 const WorkerPoolIndexForTraitsCallback& | 43 const WorkerPoolIndexForTraitsCallback& |
39 worker_pool_index_for_traits_callback) { | 44 worker_pool_index_for_traits_callback) { |
40 SetInstance(internal::TaskSchedulerImpl::Create( | 45 SetInstance(internal::TaskSchedulerImpl::Create( |
41 worker_pool_params_vector, worker_pool_index_for_traits_callback)); | 46 worker_pool_params_vector, worker_pool_index_for_traits_callback)); |
42 } | 47 } |
43 | 48 |
44 // static | 49 // static |
45 void TaskScheduler::SetInstance(std::unique_ptr<TaskScheduler> task_scheduler) { | 50 void TaskScheduler::SetInstance(std::unique_ptr<TaskScheduler> task_scheduler) { |
46 delete g_task_scheduler; | 51 delete g_task_scheduler; |
47 g_task_scheduler = task_scheduler.release(); | 52 g_task_scheduler = task_scheduler.release(); |
48 } | 53 } |
49 | 54 |
50 // static | 55 // static |
51 TaskScheduler* TaskScheduler::GetInstance() { | 56 TaskScheduler* TaskScheduler::GetInstance() { |
52 return g_task_scheduler; | 57 return g_task_scheduler; |
53 } | 58 } |
54 | 59 |
55 } // namespace base | 60 } // namespace base |
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