Re: [Boost-Users] Newbie: Problem with Signals

Ray wrote:

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 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?

I see nothing wrong with the code you posted. When I added the necessary stub definitions it compiled and ran fine.