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      1 /*
      2  * Copyright (C) 2017 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_FRAMEWORKS_DISPLAYSERVICE_V1_0_DISPLAYEVENTRECEIVER_H
     18 #define ANDROID_FRAMEWORKS_DISPLAYSERVICE_V1_0_DISPLAYEVENTRECEIVER_H
     19 
     20 #include <android/frameworks/displayservice/1.0/IDisplayEventReceiver.h>
     21 #include <gui/DisplayEventReceiver.h>
     22 #include <hidl/Status.h>
     23 #include <gui/DisplayEventReceiver.h>
     24 #include <utils/Looper.h>
     25 
     26 #include <mutex>
     27 
     28 namespace android {
     29 namespace frameworks {
     30 namespace displayservice {
     31 namespace V1_0 {
     32 namespace implementation {
     33 
     34 using ::android::hardware::Return;
     35 using ::android::hardware::Void;
     36 
     37 class DisplayEventReceiver : public IDisplayEventReceiver {
     38 public:
     39     Return<Status> init(const sp<IEventCallback>& callback) override;
     40     Return<Status> setVsyncRate(int32_t count) override;
     41     Return<Status> requestNextVsync() override;
     42     Return<Status> close() override;
     43 
     44 private:
     45     using FwkReceiver = ::android::DisplayEventReceiver;
     46 
     47     struct AttachedEvent : LooperCallback {
     48         AttachedEvent(const sp<IEventCallback> &callback);
     49         ~AttachedEvent();
     50 
     51         bool detach();
     52         bool valid() const;
     53         FwkReceiver &receiver();
     54         virtual int handleEvent(int fd, int events, void* /* data */) override;
     55 
     56     private:
     57         FwkReceiver mFwkReceiver;
     58         sp<IEventCallback> mCallback;
     59         bool mLooperAttached;
     60     };
     61 
     62     sp<AttachedEvent> mAttached;
     63     std::mutex mMutex;
     64 };
     65 
     66 }  // namespace implementation
     67 }  // namespace V1_0
     68 }  // namespace displayservice
     69 }  // namespace frameworks
     70 }  // namespace android
     71 
     72 #endif  // ANDROID_FRAMEWORKS_DISPLAYSERVICE_V1_0_DISPLAYEVENTRECEIVER_H
     73