RE: [Boost-users] Re: MultiIndexSet invariant test failure

From: Manges, Ross G (Ross.G.Manges_at_[hidden])
Date: 2005-04-14 12:40:46

Joaquin M Lopez Munoz wrote:
> You've got to implement semantics equivalent to that of
> the < relationship between numbers:
Thanks for the info; I now believe I'm doing this correctly.

> * Now, in the piece of your code where the insert asserts,
> add a precheck of the invariant:
> 
>   m.check_invariant_(); // point A
>   m.insert(...);        // point B
> 
> * Run your test till the assert fires. Is it in point
> A or B? If A, then most likely you're somehow modifying
> the elements in some other thread. Get the idea?
This is a great idea! I added the precheck as you suggested, and it
appears that I am experiencing the assert in 'point B'.  The invariant
is OK until the insertion breaks it.  So can I infer that somehow what
I'm inserting is invalid?  It's a shared_ptr.  I recently sent in
another post regarding problems I'm having with shared_ptrs that might
be related (see post w/subject: "shared_ptr use_count in multi threaded
environment").

Thanks!