mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-24 06:16:30 +03:00
55 lines
2.2 KiB
C++
55 lines
2.2 KiB
C++
// Copyright 2020 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_CPU_AFFINITY_POSIX_H_
|
|
#define BASE_CPU_AFFINITY_POSIX_H_
|
|
|
|
#include "base/base_export.h"
|
|
#include "base/process/process_handle.h"
|
|
#include "base/threading/platform_thread.h"
|
|
#include "third_party/abseil-cpp/absl/types/optional.h"
|
|
|
|
namespace base {
|
|
|
|
enum class CpuAffinityMode {
|
|
// No restrictions on affinity.
|
|
kDefault,
|
|
// Restrict execution to LITTLE cores only. Only has an effect on platforms
|
|
// where we detect presence of big.LITTLE-like CPU architectures.
|
|
kLittleCoresOnly,
|
|
// Restrict execution to big cores only. Only has an effect on platforms
|
|
// where we detect presence of big.LITTLE-like CPU architectures.
|
|
kBigCoresOnly,
|
|
// Restrict execution to bigger cores only. Only has an effect on platforms
|
|
// where we detect presence of big.LITTLE-like CPU architectures. If there
|
|
// are no bigger cores but there are big cores it will return an empty set.
|
|
kBiggerCoresOnly,
|
|
};
|
|
|
|
// Sets or clears restrictions on the CPU affinity of the specified thread.
|
|
// Returns false if updating the affinity failed.
|
|
BASE_EXPORT bool SetThreadCpuAffinityMode(PlatformThreadId thread_id,
|
|
CpuAffinityMode affinity);
|
|
// Like SetThreadAffinityMode, but affects all current and future threads of
|
|
// the given process. Note that this may not apply to threads that are created
|
|
// in parallel to the execution of this function.
|
|
BASE_EXPORT bool SetProcessCpuAffinityMode(ProcessHandle process_handle,
|
|
CpuAffinityMode affinity);
|
|
|
|
// Return true if the current architecture has big or bigger cores.
|
|
BASE_EXPORT bool HasBigCpuCores();
|
|
|
|
// Return true if the current architecture has bigger cores.
|
|
BASE_EXPORT bool HasBiggerCpuCores();
|
|
|
|
// For architectures with big cores, return the affinity mode that matches
|
|
// the CPU affinity of the current thread. If no affinity mode exactly matches,
|
|
// or if the architecture doesn't have different types of cores,
|
|
// return nullopt.
|
|
BASE_EXPORT absl::optional<CpuAffinityMode> CurrentThreadCpuAffinityMode();
|
|
|
|
} // namespace base
|
|
|
|
#endif // BASE_CPU_AFFINITY_POSIX_H_
|