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