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/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <PowerStats.h>
#include <android-base/chrono_utils.h>
#include <chrono>
#include <random>
namespace aidl {
namespace android {
namespace hardware {
namespace power {
namespace stats {
class FakeEnergyConsumer : public PowerStats::IEnergyConsumer {
public:
FakeEnergyConsumer(EnergyConsumerType type, std::string name) : mType(type), mName(name) {
mResult.timestampMs = 0;
mResult.energyUWs = 0;
mResult.attribution = {};
}
~FakeEnergyConsumer() = default;
std::string getName() override { return mName; }
EnergyConsumerType getType() override { return mType; }
std::optional<EnergyConsumerResult> getEnergyConsumed() override {
mFakeEnergyConsumerResult.update(&mResult);
return mResult;
}
private:
class FakeEnergyConsumerResult {
public:
FakeEnergyConsumerResult() : mDistribution(1, 100) {}
void update(EnergyConsumerResult* result) {
// generates number in the range 1..100
auto randNum = std::bind(mDistribution, mGenerator);
// Get current time since boot in milliseconds
uint64_t now = std::chrono::time_point_cast<std::chrono::milliseconds>(
::android::base::boot_clock::now())
.time_since_epoch()
.count();
result->timestampMs = now;
result->energyUWs += randNum() * 100;
}
private:
std::default_random_engine mGenerator;
std::uniform_int_distribution<int> mDistribution;
};
EnergyConsumerType mType;
std::string mName;
FakeEnergyConsumerResult mFakeEnergyConsumerResult;
EnergyConsumerResult mResult;
};
} // namespace stats
} // namespace power
} // namespace hardware
} // namespace android
} // namespace aidl
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