1 /* 2 * Copyright (C) 2012 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_DISPLAY_HARDWARE_BASE_H 18 #define ANDROID_DISPLAY_HARDWARE_BASE_H 19 20 #include <stdint.h> 21 #include <utils/RefBase.h> 22 #include <utils/StrongPointer.h> 23 #include <utils/threads.h> 24 25 namespace android { 26 27 class SurfaceFlinger; 28 29 class DisplayHardwareBase 30 { 31 public: 32 DisplayHardwareBase( 33 const sp<SurfaceFlinger>& flinger, 34 uint32_t displayIndex); 35 36 ~DisplayHardwareBase(); 37 38 void startSleepManagement() const; 39 40 // console management 41 void releaseScreen() const; 42 void acquireScreen() const; 43 bool isScreenAcquired() const; 44 45 bool canDraw() const; 46 47 48 private: 49 class DisplayEventThread : public Thread { 50 wp<SurfaceFlinger> mFlinger; 51 status_t waitForFbSleep(); 52 status_t waitForFbWake(); 53 public: 54 DisplayEventThread(const sp<SurfaceFlinger>& flinger); 55 virtual ~DisplayEventThread(); 56 virtual bool threadLoop(); 57 status_t initCheck() const; 58 }; 59 60 sp<DisplayEventThread> mDisplayEventThread; 61 mutable int mScreenAcquired; 62 }; 63 64 }; // namespace android 65 66 #endif // ANDROID_DISPLAY_HARDWARE_BASE_H 67