| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/task_scheduler/task_scheduler.h" |
| |
| #include <algorithm> |
| |
| #include "base/bind.h" |
| #include "base/logging.h" |
| #include "base/sys_info.h" |
| #include "base/task_scheduler/scheduler_worker_pool_params.h" |
| #include "base/task_scheduler/task_scheduler_impl.h" |
| #include "base/threading/platform_thread.h" |
| #include "base/time/time.h" |
| |
| namespace base { |
| |
| namespace { |
| |
| // |g_task_scheduler| is intentionally leaked on shutdown. |
| TaskScheduler* g_task_scheduler = nullptr; |
| |
| } // namespace |
| |
| #if !defined(OS_NACL) |
| // static |
| void TaskScheduler::CreateAndSetSimpleTaskScheduler(const std::string& name) { |
| constexpr int kMinNumThreads = 1; |
| std::vector<SchedulerWorkerPoolParams> worker_pool_params_vector; |
| worker_pool_params_vector.emplace_back( |
| name, ThreadPriority::NORMAL, |
| SchedulerWorkerPoolParams::StandbyThreadPolicy::LAZY, |
| std::max(kMinNumThreads, base::SysInfo::NumberOfProcessors()), |
| TimeDelta::FromSeconds(30)); |
| CreateAndSetDefaultTaskScheduler( |
| worker_pool_params_vector, |
| Bind([](const TaskTraits&) -> size_t { return 0; })); |
| } |
| #endif // !defined(OS_NACL) |
| |
| // static |
| void TaskScheduler::CreateAndSetDefaultTaskScheduler( |
| const std::vector<SchedulerWorkerPoolParams>& worker_pool_params_vector, |
| const WorkerPoolIndexForTraitsCallback& |
| worker_pool_index_for_traits_callback) { |
| SetInstance(internal::TaskSchedulerImpl::Create( |
| worker_pool_params_vector, worker_pool_index_for_traits_callback)); |
| } |
| |
| // static |
| void TaskScheduler::SetInstance(std::unique_ptr<TaskScheduler> task_scheduler) { |
| delete g_task_scheduler; |
| g_task_scheduler = task_scheduler.release(); |
| } |
| |
| // static |
| TaskScheduler* TaskScheduler::GetInstance() { |
| return g_task_scheduler; |
| } |
| |
| } // namespace base |