| // Copyright 2021 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "services/device/compute_pressure/cpu_probe.h" |
| |
| #include <memory> |
| |
| #include "base/sequence_checker.h" |
| #include "base/threading/scoped_blocking_call.h" |
| #include "build/build_config.h" |
| #include "services/device/compute_pressure/pressure_sample.h" |
| #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) |
| #include "services/device/compute_pressure/cpu_probe_linux.h" |
| #elif BUILDFLAG(IS_WIN) |
| #include "services/device/compute_pressure/cpu_probe_win.h" |
| #elif BUILDFLAG(IS_MAC) |
| #include "services/device/compute_pressure/cpu_probe_mac.h" |
| #endif // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) |
| |
| namespace device { |
| |
| constexpr PressureSample CpuProbe::kUnsupportedValue; |
| |
| CpuProbe::CpuProbe() = default; |
| CpuProbe::~CpuProbe() = default; |
| |
| // Default implementation for platforms that don't have one. |
| class NullCpuProbe : public CpuProbe { |
| public: |
| NullCpuProbe() { DETACH_FROM_SEQUENCE(sequence_checker_); } |
| ~NullCpuProbe() override { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| } |
| |
| // CpuProbe implementation. |
| void Update() override { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| |
| // Ensure that this method is called on a sequence that is allowed to do |
| // IO, even on OSes that don't have a CpuProbe implementation yet. |
| base::ScopedBlockingCall scoped_blocking_call( |
| FROM_HERE, base::BlockingType::MAY_BLOCK); |
| } |
| |
| PressureSample LastSample() override { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| return CpuProbe::kUnsupportedValue; |
| } |
| |
| private: |
| SEQUENCE_CHECKER(sequence_checker_); |
| }; |
| |
| // static |
| std::unique_ptr<CpuProbe> CpuProbe::Create() { |
| #if BUILDFLAG(IS_ANDROID) |
| return nullptr; |
| #elif BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) |
| return CpuProbeLinux::Create(); |
| #elif BUILDFLAG(IS_WIN) |
| return CpuProbeWin::Create(); |
| #elif BUILDFLAG(IS_MAC) |
| return CpuProbeMac::Create(); |
| #else |
| return std::make_unique<NullCpuProbe>(); |
| #endif // BUILDFLAG(IS_ANDROID) |
| } |
| |
| } // namespace device |