This is the first time I'm using boost in a multi-threaded env (linux x86_64,gcc 4).

 This question may have been asked in other forms. However, from what I've been able to search (google) up, I could not get a crystal clear answer.  I'm essentially trying to use the solution provided in this page. 

http://onlamp.com/pub/a/onlamp/2006/05/04/smart-pointers.html?page=5. 

From the boost documentation, it appears that this could be an  undefined operation as the global shared pointer is being read and written to by multiple threads. Is that correct ? 

In case the link fails  or someone wants more details, please read on. 

I've got a n reader threads and 1 writer thread. 

initializion Thread : 

shared_ptr< MyClass > global_ptr(createNewObject()) ;

WriterThread :

global_ptr.reset( createNewObject())

ReaderThreads:

weak_ptr<MyClass> local_weak_ptr (globally_ptr) ;

...

if(shared_ptr< MyClass > local_shared_ptr = local_weak_ptr.lock() ) {

 // using local_shared_ptr.

} else {

    // recreate weak ptr from global ?

}

thanks.

Rajeev