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