// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/threading/platform_thread_internal_posix.h"
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#include "base/containers/adapters.h"
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#include "base/logging.h"
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namespace base {
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namespace internal {
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int ThreadPriorityToNiceValue(ThreadPriority priority) {
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for (const auto& pair : kThreadPriorityToNiceValueMap) {
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if (pair.priority == priority)
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return pair.nice_value;
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}
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NOTREACHED() << "Unknown ThreadPriority";
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return 0;
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}
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ThreadPriority NiceValueToThreadPriority(int nice_value) {
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// Try to find a priority that best describes |nice_value|. If there isn't
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// an exact match, this method returns the closest priority whose nice value
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// is higher (lower priority) than |nice_value|.
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for (const auto& pair : Reversed(kThreadPriorityToNiceValueMap)) {
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if (pair.nice_value >= nice_value)
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return pair.priority;
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}
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// Reaching here means |nice_value| is more than any of the defined
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// priorities. The lowest priority is suitable in this case.
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return ThreadPriority::BACKGROUND;
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}
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} // namespace internal
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} // namespace base
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