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// 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 "components/system_cpu/cpu_probe.h"
#include <memory>
#include <utility>
#include "base/check_op.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/location.h"
#include "build/build_config.h"
#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
#include "components/system_cpu/cpu_probe_linux.h"
#elif BUILDFLAG(IS_WIN)
#include "components/system_cpu/cpu_probe_win.h"
#elif BUILDFLAG(IS_MAC)
#include "components/system_cpu/cpu_probe_mac.h"
#endif // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
namespace system_cpu {
// static
std::unique_ptr<CpuProbe> CpuProbe::Create() {
#if 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 nullptr;
#endif // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
}
CpuProbe::CpuProbe() = default;
CpuProbe::~CpuProbe() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
void CpuProbe::StartSampling(base::OnceClosure started_callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// Schedule the first CpuProbe update right away. This update result will
// not be reported but will set `got_probe_baseline_`.
Update(base::BindOnce(&CpuProbe::OnSamplingStarted, GetWeakPtr(),
std::move(started_callback)));
}
void CpuProbe::RequestSample(SampleCallback callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// Don't check `got_probe_baseline_` until the result is received since it
// will be set asynchronously.
Update(base::BindOnce(&CpuProbe::OnSampleAvailable, GetWeakPtr(),
std::move(callback)));
}
void CpuProbe::OnSamplingStarted(base::OnceClosure started_callback,
std::optional<CpuSample>) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
got_probe_baseline_ = true;
std::move(started_callback).Run();
}
void CpuProbe::OnSampleAvailable(SampleCallback callback,
std::optional<CpuSample> sample) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
CHECK_EQ(got_probe_baseline_, true);
if (sample.has_value()) {
CHECK_GE(sample->cpu_utilization, 0.0);
CHECK_LE(sample->cpu_utilization, 1.0);
}
std::move(callback).Run(std::move(sample));
}
} // namespace system_cpu
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