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112 lines
3.5 KiB
112 lines
3.5 KiB
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <PowerStats.h>
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#include <android-base/chrono_utils.h>
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#include <chrono>
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#include <random>
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namespace aidl {
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namespace android {
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namespace hardware {
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namespace power {
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namespace stats {
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class FakeEnergyMeter : public PowerStats::IEnergyMeter {
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public:
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FakeEnergyMeter(std::vector<std::pair<std::string, std::string>> channelNames) {
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int32_t channelId = 0;
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for (const auto& [name, subsystem] : channelNames) {
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Channel c;
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c.id = channelId++;
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c.name = name;
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c.subsystem = subsystem;
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EnergyMeasurement m;
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m.id = c.id;
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m.timestampMs = 0;
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m.durationMs = 0;
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m.energyUWs = 0;
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mChannels.push_back(c);
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mEnergyMeasurements.push_back(m);
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}
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}
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~FakeEnergyMeter() = default;
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ndk::ScopedAStatus readEnergyMeter(const std::vector<int32_t>& in_channelIds,
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std::vector<EnergyMeasurement>* _aidl_return) override {
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for (auto& measurement : mEnergyMeasurements) {
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mFakeEnergyMeasurement.update(&measurement);
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}
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if (in_channelIds.empty()) {
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*_aidl_return = mEnergyMeasurements;
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} else {
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for (int32_t id : in_channelIds) {
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// check for invalid ids
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if (id < 0 || id >= mEnergyMeasurements.size()) {
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return ndk::ScopedAStatus(AStatus_fromExceptionCode(EX_ILLEGAL_ARGUMENT));
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}
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_aidl_return->push_back(mEnergyMeasurements[id]);
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}
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}
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return ndk::ScopedAStatus::ok();
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}
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ndk::ScopedAStatus getEnergyMeterInfo(std::vector<Channel>* _aidl_return) override {
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*_aidl_return = mChannels;
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return ndk::ScopedAStatus::ok();
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}
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private:
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class FakeEnergyMeasurement {
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public:
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FakeEnergyMeasurement() : mDistribution(1, 100) {}
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void update(EnergyMeasurement* measurement) {
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// generates number in the range 1..100
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auto randNum = std::bind(mDistribution, mGenerator);
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// Get current time since boot in milliseconds
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uint64_t now = std::chrono::time_point_cast<std::chrono::milliseconds>(
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::android::base::boot_clock::now())
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.time_since_epoch()
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.count();
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measurement->timestampMs = now;
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measurement->durationMs = now;
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measurement->energyUWs += randNum() * 100;
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}
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private:
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std::default_random_engine mGenerator;
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std::uniform_int_distribution<int> mDistribution;
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};
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std::vector<Channel> mChannels;
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FakeEnergyMeasurement mFakeEnergyMeasurement;
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std::vector<EnergyMeasurement> mEnergyMeasurements;
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};
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} // namespace stats
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} // namespace power
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} // namespace hardware
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} // namespace android
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} // namespace aidl
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