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49 lines
1.8 KiB
C++
49 lines
1.8 KiB
C++
// 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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#ifndef BASE_THREADING_PLATFORM_THREAD_INTERNAL_POSIX_H_
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#define BASE_THREADING_PLATFORM_THREAD_INTERNAL_POSIX_H_
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#include "base/base_export.h"
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#include "base/threading/platform_thread.h"
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namespace base {
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namespace internal {
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struct ThreadPriorityToNiceValuePair {
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ThreadPriority priority;
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int nice_value;
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};
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// The elements must be listed in the order of increasing priority (lowest
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// priority first), that is, in the order of decreasing nice values (highest
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// nice value first).
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BASE_EXPORT extern
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const ThreadPriorityToNiceValuePair kThreadPriorityToNiceValueMap[4];
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// Returns the nice value matching |priority| based on the platform-specific
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// implementation of kThreadPriorityToNiceValueMap.
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int ThreadPriorityToNiceValue(ThreadPriority priority);
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// Returns the ThreadPrioirty matching |nice_value| based on the platform-
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// specific implementation of kThreadPriorityToNiceValueMap.
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BASE_EXPORT ThreadPriority NiceValueToThreadPriority(int nice_value);
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// Allows platform specific tweaks to the generic POSIX solution for
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// SetCurrentThreadPriority. Returns true if the platform-specific
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// implementation handled this |priority| change, false if the generic
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// implementation should instead proceed.
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bool SetCurrentThreadPriorityForPlatform(ThreadPriority priority);
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// Returns true if there is a platform-specific ThreadPriority set on the
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// current thread (and returns the actual ThreadPriority via |priority|).
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// Returns false otherwise, leaving |priority| untouched.
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bool GetCurrentThreadPriorityForPlatform(ThreadPriority* priority);
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} // namespace internal
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} // namespace base
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#endif // BASE_THREADING_PLATFORM_THREAD_INTERNAL_POSIX_H_
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