Re: [Boost-users] shared_ptr and signals

30 Dec 2008


      AMDG

James C. Sutherland wrote:
...
Is it possible to use a shared_ptr object in a signal?
I want something like
struct A{
    ...
    void operator()(){ ... }
    ...
  };
  typedef boost::signal<void()> Signal;
  Signal mySignal;
boost::shared_ptr<A> a( new A() );
  mySignal.connect(a);
The trouble seems to be getting the signal to dereference the pointer 
when the callback is made...
Any tips?
Wrap the shared_ptr in a function object

struct deref_call {
    void operator()() const {
        (*f)();
    }
    boost::shared_ptr<A> f;
};

In Christ,
Steven Watanabe