I'm thinking of using boost::weak_ptr to implement a pool of objects such that they will get reaped when nobody is using one of the objects. My concern, though, is that it's a multi-threaded environment, and it seems there's a race condition between the last shared_ptr to an object going out of scope and a new shared_ptr being constructed from the weak_ptr. Normally, you'd protect such operations with lock or something; however, the whole point here is that you don't know when the shared_ptr might be going out of scope.
Am I misunderstanding something about boost::shared_ptr and boost::weak_ptr? If not, does anybody have any good suggestions on what to do?
Thanks.
Andrew
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