base/threading/platform_thread_internal_posix.h

   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
   3 // found in the LICENSE file.
   4
   5 #ifndef BASE_THREADING_PLATFORM_THREAD_INTERNAL_POSIX_H_
   6 #define BASE_THREADING_PLATFORM_THREAD_INTERNAL_POSIX_H_
   7
   8 #include "base/threading/platform_thread.h"
   9
  10 namespace base {
  11
  12 namespace internal {
  13
  14 struct ThreadPriorityToNiceValuePair {
  15   ThreadPriority priority;
  16   int nice_value;
  17 };
  18 extern const ThreadPriorityToNiceValuePair kThreadPriorityToNiceValueMap[4];
  19
  20 // Returns the nice value matching |priority| based on the platform-specific
  21 // implementation of kThreadPriorityToNiceValueMap.
  22 int ThreadPriorityToNiceValue(ThreadPriority priority);
  23
  24 // Returns the ThreadPrioirty matching |nice_value| based on the platform-
  25 // specific implementation of kThreadPriorityToNiceValueMap.
  26 ThreadPriority NiceValueToThreadPriority(int nice_value);
  27
  28 // Allows platform specific tweaks to the generic POSIX solution for
  29 // SetThreadPriority. Returns true if the platform-specific implementation
  30 // handled this |priority| change, false if the generic implementation should
  31 // instead proceed.
  32 bool SetThreadPriorityForPlatform(PlatformThreadHandle handle,
  33                                   ThreadPriority priority);
  34
  35 // Returns true if there is a platform-specific ThreadPriority set on |handle|
  36 // (and returns the actual ThreadPriority via |priority|). Returns false
  37 // otherwise, leaving |priority| untouched.
  38 bool GetThreadPriorityForPlatform(PlatformThreadHandle handle,
  39                                   ThreadPriority* priority);
  40
  41 }  // namespace internal
  42
  43 }  // namespace base
  44
  45 #endif  // BASE_THREADING_PLATFORM_THREAD_INTERNAL_POSIX_H_