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 #include "base/threading/platform_thread_internal_posix.h" 6 7 #include "base/containers/adapters.h" 8 #include "base/logging.h" 9 10 namespace base { 11 12 namespace internal { 13 14 int ThreadPriorityToNiceValue(ThreadPriority priority) { 15 for (const auto& pair : kThreadPriorityToNiceValueMap) { 16 if (pair.priority == priority) 17 return pair.nice_value; 18 } 19 NOTREACHED() << "Unknown ThreadPriority"; 20 return 0; 21 } 22 23 ThreadPriority NiceValueToThreadPriority(int nice_value) { 24 // Try to find a priority that best describes |nice_value|. If there isn't 25 // an exact match, this method returns the closest priority whose nice value 26 // is higher (lower priority) than |nice_value|. 27 for (const auto& pair : Reversed(kThreadPriorityToNiceValueMap)) { 28 if (pair.nice_value >= nice_value) 29 return pair.priority; 30 } 31 32 // Reaching here means |nice_value| is more than any of the defined 33 // priorities. The lowest priority is suitable in this case. 34 return ThreadPriority::BACKGROUND; 35 } 36 37 } // namespace internal 38 39 } // namespace base 40
