76 lines
2.7 KiB
C
76 lines
2.7 KiB
C
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// Copyright 2015 The Chromium Authors
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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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#include "build/build_config.h"
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#include "third_party/abseil-cpp/absl/types/optional.h"
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namespace base {
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namespace internal {
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struct ThreadTypeToNiceValuePair {
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ThreadType thread_type;
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int nice_value;
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};
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struct ThreadPriorityToNiceValuePairForTest {
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ThreadPriorityForTest 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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extern const ThreadTypeToNiceValuePair kThreadTypeToNiceValueMap[7];
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// The elements must be listed in the order of decreasing priority (highest
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// priority first), that is, in the order of increasing nice values (lowest nice
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// value first).
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extern const ThreadPriorityToNiceValuePairForTest
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kThreadPriorityToNiceValueMapForTest[5];
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// Returns the nice value matching |priority| based on the platform-specific
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// implementation of kThreadTypeToNiceValueMap.
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int ThreadTypeToNiceValue(ThreadType thread_type);
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// Returns whether SetCurrentThreadTypeForPlatform can set a thread as
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// kRealtimeAudio.
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bool CanSetThreadTypeToRealtimeAudio();
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// Allows platform specific tweaks to the generic POSIX solution for
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// SetCurrentThreadType(). Returns true if the platform-specific
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// implementation handled this |thread_type| change, false if the generic
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// implementation should instead proceed.
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bool SetCurrentThreadTypeForPlatform(ThreadType thread_type,
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MessagePumpType pump_type_hint);
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#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
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// Current thread id is cached in thread local storage for performance reasons.
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// In some rare cases it's important to invalidate that cache explicitly (e.g.
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// after going through clone() syscall which does not call pthread_atfork()
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// handlers).
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// This can only be called when the process is single-threaded.
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BASE_EXPORT void InvalidateTidCache();
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#endif // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
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// Returns the ThreadPrioirtyForTest matching |nice_value| based on the
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// platform-specific implementation of kThreadPriorityToNiceValueMapForTest.
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ThreadPriorityForTest NiceValueToThreadPriorityForTest(int nice_value);
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absl::optional<ThreadPriorityForTest>
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GetCurrentThreadPriorityForPlatformForTest();
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int GetCurrentThreadNiceValue();
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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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