1 /*
2  * Copyright (C) 2020 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef ANDROID_POWERHALLOADER_H
18 #define ANDROID_POWERHALLOADER_H
19 
20 #include <android-base/thread_annotations.h>
21 #include <android/hardware/power/1.1/IPower.h>
22 #include <android/hardware/power/IPower.h>
23 
24 namespace android {
25 
26 namespace power {
27 
28 // Loads available Power HAL services.
29 class PowerHalLoader {
30 public:
31     static void unloadAll();
32     static sp<hardware::power::IPower> loadAidl();
33     static sp<hardware::power::V1_0::IPower> loadHidlV1_0();
34     static sp<hardware::power::V1_1::IPower> loadHidlV1_1();
35 
36 private:
37     static std::mutex gHalMutex;
38     static sp<hardware::power::IPower> gHalAidl GUARDED_BY(gHalMutex);
39     static sp<hardware::power::V1_0::IPower> gHalHidlV1_0 GUARDED_BY(gHalMutex);
40     static sp<hardware::power::V1_1::IPower> gHalHidlV1_1 GUARDED_BY(gHalMutex);
41 
42     static sp<hardware::power::V1_0::IPower> loadHidlV1_0Locked()
43             EXCLUSIVE_LOCKS_REQUIRED(gHalMutex);
44 
45     PowerHalLoader() = delete;
46     ~PowerHalLoader() = delete;
47 };
48 
49 }; // namespace power
50 
51 } // namespace android
52 
53 #endif // ANDROID_POWERHALLOADER_H
54