LCDSensor.h

#ifndef _LCD_SENSOR_H_
#define _LCD_SENSOR_H_

#include "../api/LCDWidget.h"
#include <map>
#include <vector>
#include <pthread.h>

class LCDWidgetTimeOut
{
 public:
  std::string _widgetId;
  int _timeOut;
  LCDWidget *_widget;
  ::pthread_t _thread;
  LCDWidgetTimeOut()
  {
    _thread = (::pthread_t)-1;
  }
  bool isValid()
  {
    return (_thread != (::pthread_t)-1);
  }
};

extern "C" void *updateWhenChanged(void *);
extern "C" void *updateEach(void *);

class LCDSensor
{
 private:
  bool _exist;
  bool _onChangeThreadStarted;

  typedef void*(*ThreadFunction)(void*);

  typedef std::map<std::string, LCDWidget *> WidgetList;
  typedef std::map<std::string, LCDWidgetTimeOut> WidgetTimeOutList;

  ::pthread_t _onChangeThread;
  WidgetList _onChangeList;
  WidgetTimeOutList _onTimeOutList;

 public:
  static const int MAX_CMD_RESULT_LINE_SIZE;
  LCDSensor();
  ~LCDSensor();
  bool exists();
  const LCDWidgetTimeOut &getThreadWidgetInfo(const ::pthread_t &thread);
  virtual void waitForChange() = 0;
  virtual std::string getCurrentValue() = 0;
  std::string intToString(int value);

  std::string executeCommand(const std::string &cmd);
  void fireChanged();
  void addOnChangeWidget(LCDWidget *widget);
  void addOnTimeOutWidget(LCDWidget *widget, int timeOut);
  void removeOnChangeWidget(LCDWidget *widget);
  void removeOnChangeWidget(std::string id);
  void removeOnTimeOutWidget(LCDWidget *widget);
  void removeOnTimeOutWidget(std::string id);
};

#endif

---