Index: base/task_scheduler/task_scheduler_impl.cc |
diff --git a/base/task_scheduler/task_scheduler_impl.cc b/base/task_scheduler/task_scheduler_impl.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..934261cccae8352e49dfa4a3b2cec247ea503903 |
--- /dev/null |
+++ b/base/task_scheduler/task_scheduler_impl.cc |
@@ -0,0 +1,117 @@ |
+// 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_impl.h" |
+ |
+#include <utility> |
+ |
+#include "base/bind.h" |
+#include "base/bind_helpers.h" |
+#include "base/logging.h" |
+#include "base/task_scheduler/sequence_sort_key.h" |
+ |
+namespace base { |
+namespace internal { |
+ |
+TaskSchedulerImpl::~TaskSchedulerImpl() { |
+ DCHECK(join_for_testing_returned_.IsSignaled()); |
+} |
+ |
+// static |
+std::unique_ptr<TaskSchedulerImpl> TaskSchedulerImpl::Create() { |
gab
2016/04/27 19:15:28
In SchedulerThreadPool we had a static Create() wi
fdoray
2016/04/28 18:36:32
Done.
robliao
2016/04/29 18:34:21
While this class doesn't support creation failure,
fdoray
2016/04/29 19:42:42
If TaskSchedulerImpl::Create successfully creates
gab
2016/04/29 20:33:18
Agreed, and I think the "doing work in the constru
|
+ std::unique_ptr<TaskSchedulerImpl> scheduler(new TaskSchedulerImpl); |
+ scheduler->Initialize(); |
+ return scheduler; |
+} |
+ |
+scoped_refptr<TaskRunner> TaskSchedulerImpl::CreateTaskRunnerWithTraits( |
+ const TaskTraits& traits, |
+ ExecutionMode execution_mode) { |
+ return GetThreadPoolForTraits(traits)->CreateTaskRunnerWithTraits( |
+ traits, execution_mode); |
+} |
+ |
+void TaskSchedulerImpl::Shutdown() { |
+ // TODO(fdoray): Increase the priority of BACKGROUND tasks blocking shutdown. |
+ task_tracker_.Shutdown(); |
+} |
+ |
+void TaskSchedulerImpl::JoinForTesting() { |
+ DCHECK(!join_for_testing_returned_.IsSignaled()); |
+ background_thread_pool_->JoinForTesting(); |
+ background_file_io_thread_pool_->JoinForTesting(); |
+ normal_thread_pool_->JoinForTesting(); |
+ normal_file_io_thread_pool_->JoinForTesting(); |
+ join_for_testing_returned_.Signal(); |
+} |
+ |
+TaskSchedulerImpl::TaskSchedulerImpl() |
+ // TODO(robliao): Wake up the service thread instead of calling DoNothing() |
+ // when the delayed run time changes. |
+ : delayed_task_manager_(Bind(&DoNothing)), |
+ join_for_testing_returned_(true, false) {} |
+ |
+void TaskSchedulerImpl::Initialize() { |
+ const SchedulerThreadPoolImpl::ReEnqueueSequenceCallback |
+ re_enqueue_sequence_callback = |
+ Bind(&TaskSchedulerImpl::ReEnqueueSequenceCallback, Unretained(this)); |
+ |
+ // TODO(fdoray): Derive the number of threads per pool from hardware |
+ // characteristics rather than using hard-coded constants. |
+ |
+ // Passing pointers to objects owned by |this| to |
+ // SchedulerThreadPoolImpl::Create() is safe because a TaskSchedulerImpl can't |
+ // be deleted before all its thread pools have been joined. |
+ background_thread_pool_ = SchedulerThreadPoolImpl::Create( |
+ ThreadPriority::BACKGROUND, 1U, re_enqueue_sequence_callback, |
+ &task_tracker_, &delayed_task_manager_); |
+ CHECK(background_thread_pool_); |
+ |
+ background_file_io_thread_pool_ = SchedulerThreadPoolImpl::Create( |
+ ThreadPriority::BACKGROUND, 1U, re_enqueue_sequence_callback, |
+ &task_tracker_, &delayed_task_manager_); |
+ CHECK(background_file_io_thread_pool_); |
+ |
+ normal_thread_pool_ = SchedulerThreadPoolImpl::Create( |
+ ThreadPriority::NORMAL, 4U, re_enqueue_sequence_callback, &task_tracker_, |
+ &delayed_task_manager_); |
+ CHECK(normal_thread_pool_); |
+ |
+ normal_file_io_thread_pool_ = SchedulerThreadPoolImpl::Create( |
+ ThreadPriority::NORMAL, 12U, re_enqueue_sequence_callback, &task_tracker_, |
+ &delayed_task_manager_); |
+ CHECK(normal_file_io_thread_pool_); |
+} |
+ |
+SchedulerThreadPool* TaskSchedulerImpl::GetThreadPoolForTraits( |
+ const TaskTraits& traits) { |
+ if (traits.with_file_io()) { |
+ if (traits.priority() == TaskPriority::BACKGROUND) |
+ return background_file_io_thread_pool_.get(); |
+ return normal_file_io_thread_pool_.get(); |
+ } |
+ |
+ if (traits.priority() == TaskPriority::BACKGROUND) |
+ return background_thread_pool_.get(); |
+ return normal_thread_pool_.get(); |
+} |
+ |
+void TaskSchedulerImpl::ReEnqueueSequenceCallback( |
+ scoped_refptr<Sequence> sequence) { |
+ DCHECK(sequence); |
+ |
+ const SequenceSortKey sort_key = sequence->GetSortKey(); |
+ const Task* next_task_in_sequence = sequence->PeekTask(); |
+ DCHECK(next_task_in_sequence); |
+ |
+ TaskTraits traits = TaskTraits().WithPriority(sort_key.priority); |
+ if (next_task_in_sequence->traits.with_file_io()) |
+ traits = traits.WithFileIO(); |
+ |
+ GetThreadPoolForTraits(traits)->ReEnqueueSequence(std::move(sequence), |
gab
2016/04/27 19:15:28
Why not use |next_task_in_sequence->traits| instea
fdoray
2016/04/28 18:36:32
Added comment to explain why I do this.
|
+ sort_key); |
+} |
+ |
+} // namespace internal |
+} // namespace base |