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+/*
+ * 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 isScreenAcquired() const;
+
+ bool canDraw() const;
+ void setCanDraw(bool canDraw);
+
+
+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;
+ mutable int mScreenAcquired;
+};
+
+}; // namespace android
+
+#endif // ANDROID_DISPLAY_HARDWARE_BASE_H