I can't make sense of your code ("weakThis" in both A and B, even though B is derived from A?), but have a look at boost::shared_from_this Am Wednesday 28 October 2009 12:43:08 schrieb Jacob Carlborg:
I'm having some problems with bad_weak_ptr exceptions. I have reduced my code into this test case:
#include
#include using boost::shared_ptr; using boost::weak_ptr;
class A { weak_ptr<A> weakThis;
public: virtual ~A(){}
shared_ptr<A> a;
shared_ptr<A> getThis () { shared_ptr<A> x(weakThis); return x; }
void init () { a = getThis(); }
static shared_ptr<A> create () { shared_ptr<A> x(new A);
x->weakThis = x; x->init();
return x; } };
class B : public A { weak_ptr<B> weakThis; public: virtual ~B(){}
shared_ptr<B> getThis () { shared_ptr<B> b(weakThis); return b; }
static shared_ptr<B> create () { shared_ptr<B> x(new B); x->weakThis = x; x->init();
return x; } };
int main (char** argv, int argc) { shared_ptr<B> b = B::create();
return 0; }
If I create an instance of A instead of B or doesn't call x->init() in the B's create function I don't get an exception. The problem is creating a shared_ptr from the weak_ptr in getThis.
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