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/*
* Copyright (C) 2020 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.
*/
#ifndef ANDROID_POWERHALCONTROLLER_H
#define ANDROID_POWERHALCONTROLLER_H
#include <android-base/thread_annotations.h>
#include <android/hardware/power/Boost.h>
#include <android/hardware/power/IPower.h>
#include <android/hardware/power/IPowerHintSession.h>
#include <android/hardware/power/Mode.h>
#include <powermanager/PowerHalWrapper.h>
namespace android {
namespace power {
// -------------------------------------------------------------------------------------------------
// Connects to underlying Power HAL handles.
class HalConnector {
public:
HalConnector() = default;
virtual ~HalConnector() = default;
virtual std::unique_ptr<HalWrapper> connect();
virtual void reset();
};
// -------------------------------------------------------------------------------------------------
// Controller for Power HAL handle.
// This relies on HalConnector to connect to the underlying Power HAL
// service and reconnects to it after each failed api call. This also ensures
// connecting to the service is thread-safe.
class PowerHalController : public HalWrapper {
public:
PowerHalController() : PowerHalController(std::make_unique<HalConnector>()) {}
explicit PowerHalController(std::unique_ptr<HalConnector> connector)
: mHalConnector(std::move(connector)) {}
virtual ~PowerHalController() = default;
void init();
virtual HalResult<void> setBoost(hardware::power::Boost boost, int32_t durationMs) override;
virtual HalResult<void> setMode(hardware::power::Mode mode, bool enabled) override;
virtual HalResult<sp<hardware::power::IPowerHintSession>> createHintSession(
int32_t tgid, int32_t uid, const std::vector<int32_t>& threadIds,
int64_t durationNanos) override;
virtual HalResult<int64_t> getHintSessionPreferredRate() override;
private:
std::mutex mConnectedHalMutex;
std::unique_ptr<HalConnector> mHalConnector;
// Shared pointers to keep global pointer and allow local copies to be used in
// different threads
std::shared_ptr<HalWrapper> mConnectedHal GUARDED_BY(mConnectedHalMutex) = nullptr;
const std::shared_ptr<HalWrapper> mDefaultHal = std::make_shared<EmptyHalWrapper>();
std::shared_ptr<HalWrapper> initHal();
template <typename T>
HalResult<T> processHalResult(HalResult<T> result, const char* functionName);
};
// -------------------------------------------------------------------------------------------------
}; // namespace power
}; // namespace android
#endif // ANDROID_POWERHALCONTROLLER_H
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