diff --git a/include/powermanager/PowerHalLoader.h b/include/powermanager/PowerHalLoader.h
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+++ b/include/powermanager/PowerHalLoader.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_POWERHALLOADER_H
+#define ANDROID_POWERHALLOADER_H
+
+#include <android-base/thread_annotations.h>
+
+#include <android/hardware/power/1.1/IPower.h>
+#include <android/hardware/power/IPower.h>
+
+using IPowerV1_0 = android::hardware::power::V1_0::IPower;
+using IPowerV1_1 = android::hardware::power::V1_1::IPower;
+using IPowerAidl = android::hardware::power::IPower;
+
+namespace android {
+
+// Loads available Power HAL services.
+class PowerHalLoader {
+public:
+    static void unloadAll();
+    static sp<IPowerAidl> loadAidl();
+    static sp<IPowerV1_0> loadHidlV1_0();
+    static sp<IPowerV1_1> loadHidlV1_1();
+
+private:
+    static std::mutex gHalMutex;
+    static sp<IPowerAidl> gHalAidl GUARDED_BY(gHalMutex);
+    static sp<IPowerV1_0> gHalHidlV1_0 GUARDED_BY(gHalMutex);
+    static sp<IPowerV1_1> gHalHidlV1_1 GUARDED_BY(gHalMutex);
+
+    static sp<IPowerV1_0> loadHidlV1_0Locked() EXCLUSIVE_LOCKS_REQUIRED(gHalMutex);
+
+    PowerHalLoader() = default;
+};
+
+} // namespace android
+
+#endif // ANDROID_POWERHALLOADER_H