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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 #ifndef BASE_TASK_SCHEDULER_TASK_TRACKER_POSIX_H_ | 5 #ifndef BASE_TASK_SCHEDULER_TASK_TRACKER_POSIX_H_ |
6 #define BASE_TASK_SCHEDULER_TASK_TRACKER_POSIX_H_ | 6 #define BASE_TASK_SCHEDULER_TASK_TRACKER_POSIX_H_ |
7 | 7 |
8 #include <memory> | 8 #include <memory> |
9 | 9 |
10 #include "base/base_export.h" | 10 #include "base/base_export.h" |
11 #include "base/logging.h" | |
11 #include "base/macros.h" | 12 #include "base/macros.h" |
12 #include "base/task_scheduler/task_tracker.h" | 13 #include "base/task_scheduler/task_tracker.h" |
14 #include "base/threading/platform_thread.h" | |
13 | 15 |
14 namespace base { | 16 namespace base { |
15 | 17 |
16 class MessageLoopForIO; | 18 class MessageLoopForIO; |
17 | 19 |
18 namespace internal { | 20 namespace internal { |
19 | 21 |
20 struct Task; | 22 struct Task; |
21 | 23 |
22 // A TaskTracker that instantiates a FileDescriptorWatcher in the scope in which | 24 // A TaskTracker that instantiates a FileDescriptorWatcher in the scope in which |
23 // a task runs. Used on all POSIX platforms except NaCl SFI. | 25 // a task runs. Used on all POSIX platforms except NaCl SFI. |
24 // set_watch_file_descriptor_message_loop() must be called before the | 26 // set_watch_file_descriptor_message_loop() must be called before the |
25 // TaskTracker can run tasks. | 27 // TaskTracker can run tasks. |
26 class BASE_EXPORT TaskTrackerPosix : public TaskTracker { | 28 class BASE_EXPORT TaskTrackerPosix : public TaskTracker { |
27 public: | 29 public: |
28 TaskTrackerPosix(); | 30 TaskTrackerPosix(); |
29 ~TaskTrackerPosix(); | 31 ~TaskTrackerPosix(); |
30 | 32 |
31 // Sets the MessageLoopForIO with which to setup FileDescriptorWatcher in the | 33 // Sets the MessageLoopForIO with which to setup FileDescriptorWatcher in the |
32 // scope in which tasks run. Must be called before starting to run tasks. | 34 // scope in which tasks run. Must be called before starting to run tasks. |
33 // External synchronization is required between a call to this and a call to | 35 // External synchronization is required between a call to this and a call to |
34 // RunTask(). | 36 // RunTask(). |
35 void set_watch_file_descriptor_message_loop( | 37 void set_watch_file_descriptor_message_loop( |
36 MessageLoopForIO* watch_file_descriptor_message_loop) { | 38 MessageLoopForIO* watch_file_descriptor_message_loop) { |
37 watch_file_descriptor_message_loop_ = watch_file_descriptor_message_loop; | 39 watch_file_descriptor_message_loop_ = watch_file_descriptor_message_loop; |
38 } | 40 } |
39 | 41 |
42 #if DCHECK_IS_ON() | |
43 // TODO(robliao): http://crbug.com/698140. This addresses service thread tasks | |
44 // that could run after the task scheduler has shut down. Anything from the | |
45 // service thread is exempted from the task scheduler shutdown DCHECKs. | |
46 void set_service_thread_handle( | |
gab
2017/05/04 17:36:11
Can you set a bit in TLS in TaskTracker instead of
robliao
2017/05/04 17:43:24
That would create a race between starting the thre
robliao
2017/05/04 17:44:06
One more note, this code will go away once we fix
| |
47 const PlatformThreadHandle& service_thread_handle) { | |
48 DCHECK(!service_thread_handle.is_null()); | |
49 service_thread_handle_ = service_thread_handle; | |
50 } | |
51 #endif | |
52 | |
40 private: | 53 private: |
41 // TaskTracker: | 54 // TaskTracker: |
42 void PerformRunTask(std::unique_ptr<Task> task) override; | 55 void PerformRunTask(std::unique_ptr<Task> task) override; |
43 | 56 |
57 #if DCHECK_IS_ON() | |
58 bool IsExemptFromBlockingShutdownChecks() override; | |
gab
2017/05/04 17:36:11
Why is this POSIX only?
robliao
2017/05/04 17:43:24
FileDescriptorWatchers only exist on POSIX. Delaye
| |
59 #endif | |
60 | |
44 MessageLoopForIO* watch_file_descriptor_message_loop_ = nullptr; | 61 MessageLoopForIO* watch_file_descriptor_message_loop_ = nullptr; |
45 | 62 |
63 #if DCHECK_IS_ON() | |
64 PlatformThreadHandle service_thread_handle_; | |
65 #endif | |
66 | |
46 DISALLOW_COPY_AND_ASSIGN(TaskTrackerPosix); | 67 DISALLOW_COPY_AND_ASSIGN(TaskTrackerPosix); |
47 }; | 68 }; |
48 | 69 |
49 } // namespace internal | 70 } // namespace internal |
50 } // namespace base | 71 } // namespace base |
51 | 72 |
52 #endif // BASE_TASK_SCHEDULER_TASK_TRACKER_POSIX_H_ | 73 #endif // BASE_TASK_SCHEDULER_TASK_TRACKER_POSIX_H_ |
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