Re: [Boost-users] shared_ptr to this

9 Sep 2013


      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"  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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