Re: [Boost-users] shared_ptr to this

Subject: Re: [Boost-users] shared_ptr to this
From: Mateusz Loskot (mateusz_at_[hidden])
Date: 2013-09-09 17:59:07

In your st, sruct Data, make the ptr a shared_ptr with custom deleter which
does nothing.

Mateusz  Loskot
(Sent from mobile, apology for top-posting and broken quotes)
On 9 Sep 2013 21:55, "Gonzalo Garramuno" <ggarra13_at_[hidden]> wrote:

> I have an application where I need to pass "this" in a callback belonging
> to a class to a function using a shared_ptr in another thread
>
> In code:
>
> struct Data
> {
>     Data( void* p ) :
>     ptr( p )
>    {
>    }
>
>     boost::shared_ptr<void> ptr;
> };
>
> void threadA( Data* d )
> {
>     boost::shared_ptr<void> ptr( d->ptr );
>     delete d;
>     // use ptr
> }
>
> class A
> {
>    void init_thread()
>    {
>      Data* data = new Data( this );
>      boost.thread t( boost::bind( threadA, data ) );
>    }
> };
>
> The problem is obvious.  Once threadA closes, the shared ptr is destroyed
> as its count is 0 and as it points to the this of class A this gets deleted
> too.
> However my class A is still active and should not get deleted.  How can I
> work around this?
>
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>