115 lines
4.8 KiB
C++
115 lines
4.8 KiB
C++
/*
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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 <memory>
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#include <optional>
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#include <aidl/android/hardware/health/BnHealth.h>
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#include <aidl/android/hardware/health/IHealthInfoCallback.h>
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#include <android/binder_auto_utils.h>
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#include <health-impl/HalHealthLoop.h>
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#include <healthd/BatteryMonitor.h>
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#include <healthd/healthd.h>
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namespace aidl::android::hardware::health {
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class LinkedCallback;
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// AIDL version of android::hardware::health::V2_1::implementation::Health and BinderHealth.
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// There's no need to separate the two in AIDL because AIDL does not support passthrough transport.
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//
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// Instead of inheriting from HalHealthLoop directly, implements the callback interface to
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// HalHealthLoop instead.
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//
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// Sample implementation of health HAL.
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class Health : public BnHealth, public HalHealthLoopCallback {
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public:
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// Initialize with |config|.
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// A subclass may modify |config| before passing it to the parent constructor.
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// See implementation of Health for code samples.
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Health(std::string_view instance_name, std::unique_ptr<struct healthd_config>&& config);
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virtual ~Health();
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ndk::ScopedAStatus registerCallback(
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const std::shared_ptr<IHealthInfoCallback>& callback) override;
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ndk::ScopedAStatus unregisterCallback(
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const std::shared_ptr<IHealthInfoCallback>& callback) override;
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ndk::ScopedAStatus update() override;
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// A subclass should not override this. Override UpdateHealthInfo instead.
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ndk::ScopedAStatus getHealthInfo(HealthInfo* out) override final;
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// A subclass is recommended to override the path in healthd_config in the constructor.
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// Only override these if there are no suitable kernel interfaces to read these values.
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ndk::ScopedAStatus getChargeCounterUah(int32_t* out) override;
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ndk::ScopedAStatus getCurrentNowMicroamps(int32_t* out) override;
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ndk::ScopedAStatus getCurrentAverageMicroamps(int32_t* out) override;
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ndk::ScopedAStatus getCapacity(int32_t* out) override;
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ndk::ScopedAStatus getChargeStatus(BatteryStatus* out) override;
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// A subclass may either override these or provide function pointers in
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// in healthd_config in the constructor.
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// Prefer overriding these for efficiency.
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ndk::ScopedAStatus getEnergyCounterNwh(int64_t* out) override;
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// A subclass may override these for a specific device.
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// The default implementations return nothing in |out|.
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ndk::ScopedAStatus getDiskStats(std::vector<DiskStats>* out) override;
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ndk::ScopedAStatus getStorageInfo(std::vector<StorageInfo>* out) override;
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// A subclass may override these to provide a different implementation.
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binder_status_t dump(int fd, const char** args, uint32_t num_args) override;
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// HalHealthLoopCallback implementation.
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void OnInit(HalHealthLoop* hal_health_loop, struct healthd_config* config) override;
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void OnHealthInfoChanged(const HealthInfo& health_info) override;
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// A subclass may override this if it wants to handle binder events differently.
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virtual void BinderEvent(uint32_t epevents);
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// A subclass may override this to determine whether screen should be kept on in charger mode.
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// Default is to invoke healthd_config->screen_on() on the BatteryProperties converted
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// from getHealthInfo.
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// Prefer overriding these to providing screen_on in healthd_config in the constructor
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// for efficiency.
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virtual std::optional<bool> ShouldKeepScreenOn();
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protected:
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// A subclass can override this to modify any health info object before
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// returning to clients. This is similar to healthd_board_battery_update().
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// By default, it does nothing.
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// See implementation of Health for code samples.
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virtual void UpdateHealthInfo(HealthInfo* health_info);
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private:
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friend LinkedCallback; // for exposing death_recipient_
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bool unregisterCallbackInternal(std::shared_ptr<IHealthInfoCallback> callback);
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std::string instance_name_;
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::android::BatteryMonitor battery_monitor_;
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std::unique_ptr<struct healthd_config> healthd_config_;
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ndk::ScopedAIBinder_DeathRecipient death_recipient_;
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int binder_fd_ = -1;
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std::mutex callbacks_lock_;
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std::vector<std::unique_ptr<LinkedCallback>> callbacks_;
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};
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} // namespace aidl::android::hardware::health
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