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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 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
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