/* * Copyright (C) 2007 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_DISPLAY_HARDWARE_BASE_H #define ANDROID_DISPLAY_HARDWARE_BASE_H #include <stdint.h> #include <utils/RefBase.h> #include <utils/threads.h> #include <linux/kd.h> #include <linux/vt.h> #include "Barrier.h" namespace android { class SurfaceFlinger; class DisplayHardwareBase { public: DisplayHardwareBase( const sp<SurfaceFlinger>& flinger, uint32_t displayIndex); ~DisplayHardwareBase(); // console managment void releaseScreen() const; void acquireScreen() const; bool canDraw() const; private: class DisplayEventThreadBase : public Thread { protected: wp<SurfaceFlinger> mFlinger; public: DisplayEventThreadBase(const sp<SurfaceFlinger>& flinger); virtual ~DisplayEventThreadBase(); virtual void onFirstRef() { run("DisplayEventThread", PRIORITY_URGENT_DISPLAY); } virtual status_t acquireScreen() const { return NO_ERROR; }; virtual status_t releaseScreen() const { return NO_ERROR; }; virtual status_t initCheck() const = 0; }; class DisplayEventThread : public DisplayEventThreadBase { mutable Barrier mBarrier; public: DisplayEventThread(const sp<SurfaceFlinger>& flinger); virtual ~DisplayEventThread(); virtual bool threadLoop(); virtual status_t readyToRun(); virtual status_t releaseScreen() const; virtual status_t initCheck() const; }; class ConsoleManagerThread : public DisplayEventThreadBase { int consoleFd; int vt_num; int prev_vt_num; vt_mode vm; static void sigHandler(int sig); static pid_t sSignalCatcherPid; public: ConsoleManagerThread(const sp<SurfaceFlinger>& flinger); virtual ~ConsoleManagerThread(); virtual bool threadLoop(); virtual status_t readyToRun(); virtual void requestExit(); virtual status_t releaseScreen() const; virtual status_t initCheck() const; }; sp<DisplayEventThreadBase> mDisplayEventThread; mutable int mCanDraw; }; }; // namespace android #endif // ANDROID_DISPLAY_HARDWARE_BASE_H