Newbie: Problem with Signals

15 May 2003

      I am having some problems with boost::signals version 1_30_0 on XP, 
compiled and linked using VC6.

I am building a timer mechanism, similar to that with Qt.
A user instanciates a timer with some millisecond value, starts the 
timer via t.Start(), and then enters the event loop (or in most 
cases, returns from a function call by the event loop). 

Timer definition:

class Timer  {
  typedef boost::signal1<void, int> TimerSignalType;
  typedef TimerSignalType::slot_type   TimerSlotType;
public:
  boost::signals::connection TimerConnect(const TimerSlotType& slot )
  { return OnRing.connect( slot ); }
  Timer();
  Timer( const Timer& );
  Timer( unsigned long millesecInterval, TimerType t = Continous );
  ~Timer();

  void Start();

  void           Ring() {OnRing( myId );}

private:

  TimerSignalType OnRing;
  int              myId;
};

void Rang( int i )
{
   cout << "Received timer " << endl;
}

main()
{
  EventLoop *eventLoop = EventLoop::Instance();
  Timer t1( 3000, Continous );
  t1.TimerConnect( boost::bind( Rang, _1) );
  t1.Start();
  eventLoop->Exec();
}

eventLoop->Exec() start an event loop.
The code always crashes when atteping to execute the connected 
function. 

What am I doing wrong?

Ray