Re: [Boost-users] boost::bind - What if bound (method, instance) doesn't exist anymore?

Subject: Re: [Boost-users] boost::bind - What if bound (method, instance) doesn't exist anymore?
From: Igor R (boost.lists_at_[hidden])
Date: 2011-10-06 11:56:18

> What happens when a boost::function is called and has been created with a
> (method, instance) combination, but the instance no longer exists?
>
> What happens when this is in combination with boost::asio::io_service?
>
> Here is my suspect code:
>
> B::SharedPtr me = boost::dynamic_pointer_cast<B, A>(shared_from_this());
> callback = boost::bind(&B::Foo, me, boost::asio::placeholder::error);
>
> // this is a boost::asio::ip::tcp::acceptor
> acceptor.async_accept(socket_, callback);
>
> Now suppose I use a raw pointer instead.
> Now suppose the instance that just got bound was destroyed before the accept
> happened.
>
> What will be the result?

Crash (access violation / segfault).