OLD | NEW |
1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 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_THREADING_PLATFORM_THREAD_INTERNAL_POSIX_H_ | 5 #ifndef BASE_THREADING_PLATFORM_THREAD_INTERNAL_POSIX_H_ |
6 #define BASE_THREADING_PLATFORM_THREAD_INTERNAL_POSIX_H_ | 6 #define BASE_THREADING_PLATFORM_THREAD_INTERNAL_POSIX_H_ |
7 | 7 |
| 8 #include "base/base_export.h" |
8 #include "base/threading/platform_thread.h" | 9 #include "base/threading/platform_thread.h" |
9 | 10 |
10 namespace base { | 11 namespace base { |
11 | 12 |
12 namespace internal { | 13 namespace internal { |
13 | 14 |
14 struct ThreadPriorityToNiceValuePair { | 15 struct ThreadPriorityToNiceValuePair { |
15 ThreadPriority priority; | 16 ThreadPriority priority; |
16 int nice_value; | 17 int nice_value; |
17 }; | 18 }; |
| 19 // The elements must be listed in the order of increasing priority (lowest |
| 20 // priority first), that is, in the order of decreasing nice values (highest |
| 21 // nice value first). |
18 extern const ThreadPriorityToNiceValuePair kThreadPriorityToNiceValueMap[4]; | 22 extern const ThreadPriorityToNiceValuePair kThreadPriorityToNiceValueMap[4]; |
19 | 23 |
20 // Returns the nice value matching |priority| based on the platform-specific | 24 // Returns the nice value matching |priority| based on the platform-specific |
21 // implementation of kThreadPriorityToNiceValueMap. | 25 // implementation of kThreadPriorityToNiceValueMap. |
22 int ThreadPriorityToNiceValue(ThreadPriority priority); | 26 int ThreadPriorityToNiceValue(ThreadPriority priority); |
23 | 27 |
24 // Returns the ThreadPrioirty matching |nice_value| based on the platform- | 28 // Returns the ThreadPrioirty matching |nice_value| based on the platform- |
25 // specific implementation of kThreadPriorityToNiceValueMap. | 29 // specific implementation of kThreadPriorityToNiceValueMap. |
26 ThreadPriority NiceValueToThreadPriority(int nice_value); | 30 BASE_EXPORT ThreadPriority NiceValueToThreadPriority(int nice_value); |
27 | 31 |
28 // Allows platform specific tweaks to the generic POSIX solution for | 32 // Allows platform specific tweaks to the generic POSIX solution for |
29 // SetCurrentThreadPriority. Returns true if the platform-specific | 33 // SetCurrentThreadPriority. Returns true if the platform-specific |
30 // implementation handled this |priority| change, false if the generic | 34 // implementation handled this |priority| change, false if the generic |
31 // implementation should instead proceed. | 35 // implementation should instead proceed. |
32 bool SetCurrentThreadPriorityForPlatform(ThreadPriority priority); | 36 bool SetCurrentThreadPriorityForPlatform(ThreadPriority priority); |
33 | 37 |
34 // Returns true if there is a platform-specific ThreadPriority set on the | 38 // Returns true if there is a platform-specific ThreadPriority set on the |
35 // current thread (and returns the actual ThreadPriority via |priority|). | 39 // current thread (and returns the actual ThreadPriority via |priority|). |
36 // Returns false otherwise, leaving |priority| untouched. | 40 // Returns false otherwise, leaving |priority| untouched. |
37 bool GetCurrentThreadPriorityForPlatform(ThreadPriority* priority); | 41 bool GetCurrentThreadPriorityForPlatform(ThreadPriority* priority); |
38 | 42 |
39 } // namespace internal | 43 } // namespace internal |
40 | 44 |
41 } // namespace base | 45 } // namespace base |
42 | 46 |
43 #endif // BASE_THREADING_PLATFORM_THREAD_INTERNAL_POSIX_H_ | 47 #endif // BASE_THREADING_PLATFORM_THREAD_INTERNAL_POSIX_H_ |
OLD | NEW |