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 }; |
18 extern const ThreadPriorityToNiceValuePair kThreadPriorityToNiceValueMap[4]; | 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). |
| 22 BASE_EXPORT extern |
| 23 const ThreadPriorityToNiceValuePair kThreadPriorityToNiceValueMap[4]; |
19 | 24 |
20 // Returns the nice value matching |priority| based on the platform-specific | 25 // Returns the nice value matching |priority| based on the platform-specific |
21 // implementation of kThreadPriorityToNiceValueMap. | 26 // implementation of kThreadPriorityToNiceValueMap. |
22 int ThreadPriorityToNiceValue(ThreadPriority priority); | 27 int ThreadPriorityToNiceValue(ThreadPriority priority); |
23 | 28 |
24 // Returns the ThreadPrioirty matching |nice_value| based on the platform- | 29 // Returns the ThreadPrioirty matching |nice_value| based on the platform- |
25 // specific implementation of kThreadPriorityToNiceValueMap. | 30 // specific implementation of kThreadPriorityToNiceValueMap. |
26 ThreadPriority NiceValueToThreadPriority(int nice_value); | 31 BASE_EXPORT ThreadPriority NiceValueToThreadPriority(int nice_value); |
27 | 32 |
28 // Allows platform specific tweaks to the generic POSIX solution for | 33 // Allows platform specific tweaks to the generic POSIX solution for |
29 // SetCurrentThreadPriority. Returns true if the platform-specific | 34 // SetCurrentThreadPriority. Returns true if the platform-specific |
30 // implementation handled this |priority| change, false if the generic | 35 // implementation handled this |priority| change, false if the generic |
31 // implementation should instead proceed. | 36 // implementation should instead proceed. |
32 bool SetCurrentThreadPriorityForPlatform(ThreadPriority priority); | 37 bool SetCurrentThreadPriorityForPlatform(ThreadPriority priority); |
33 | 38 |
34 // Returns true if there is a platform-specific ThreadPriority set on the | 39 // Returns true if there is a platform-specific ThreadPriority set on the |
35 // current thread (and returns the actual ThreadPriority via |priority|). | 40 // current thread (and returns the actual ThreadPriority via |priority|). |
36 // Returns false otherwise, leaving |priority| untouched. | 41 // Returns false otherwise, leaving |priority| untouched. |
37 bool GetCurrentThreadPriorityForPlatform(ThreadPriority* priority); | 42 bool GetCurrentThreadPriorityForPlatform(ThreadPriority* priority); |
38 | 43 |
39 } // namespace internal | 44 } // namespace internal |
40 | 45 |
41 } // namespace base | 46 } // namespace base |
42 | 47 |
43 #endif // BASE_THREADING_PLATFORM_THREAD_INTERNAL_POSIX_H_ | 48 #endif // BASE_THREADING_PLATFORM_THREAD_INTERNAL_POSIX_H_ |
OLD | NEW |