Re: [Boost-users] Problem with enable_shared_from_this and shared_ptr

Subject: Re: [Boost-users] Problem with enable_shared_from_this and shared_ptr
From: Ryan McConnehey (mccorywork_at_[hidden])
Date: 2010-07-20 22:32:17

Michael Caisse wrote:
> Ryan McConnehey wrote:
>> If class "Pool" inherits from enable_shared_from_this the 
>> documentation says I'm able to do the following.
>>
>> shared_ptr<Pool> aPool = shared_from_this();
>>
>> The minimal code I've included shows that this isn't happening.  The 
>> code compiles but I get this error "tr1::bad_weak_ptr".  What should 
>> I be doing different?
>>
>> Ryan
>>
>>
>> [CODE]
>>
>> //C++ Includes
>> #include <exception>
>> #include <iostream>
>> #include <vector>
>> #include <algorithm>
>>
>> //Boost Includes
>> #include <boost/shared_ptr.hpp>
>> #include <boost/enable_shared_from_this.hpp>
>>
>> class pool : public boost::enable_shared_from_this< pool >  {
>> private:
>>  using boost::enable_shared_from_this< pool >::shared_from_this;
>>
>> public:
>>  boost::shared_ptr<int> get(void)  {
>>    boost::shared_ptr<pool> aPool = shared_from_this();   //This is 
>> where the tr1::bad_weak_ptr happens.
>
> Ryan -
>
> See the documentation here:
> <http://www.boost.org/doc/libs/1_43_0/libs/smart_ptr/enable_shared_from_this.html> 
>
>
> There must be at least one shared_ptr instance that owns the object 
> that you are calling shared_from_this() on. Also see the examples at 
> the above link.
>
> hth -
> michael
>
I've looked at that documentation already.  That's part of why of I know 
I should be able to do what I want.

Ryan