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diff --git a/include/powermanager/PowerHalController.h b/include/powermanager/PowerHalController.h
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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