Re: [Boost-users] Boost shared pointers, PThreads and void* casts

From: Zeljko Vrba (zvrba_at_[hidden])
Date: 2007-12-19 09:41:04

On Wed, Dec 19, 2007 at 01:21:10PM +0100, STenyaK (Bruno Gonzalez) wrote:
> 
> Ok. This is how my code structure looks:
> ----------------------------
> typedef shared_ptr<MyClass> pMyClass;
> void* MyClass::actionThread(void *objectPointer)
> {
>     pMyClass * _obj = static_cast<pMyClass*>(objectPointer);
>     pMyClass obj = *_obj;
>     obj->action(false);
>     delete _obj;
> }

It is _crucial_ to call delete BEFORE any other action in the code, or else
you may suffer memory leak (consider e.g. that action throws an exception).
Otherwise, your interpretation seems correct.

> 
> Do i need to use enable_shared_from_this?
> Or do i have to avoid using "this" (orig_ptr in your code) somehow maybe?
> 
Uf, I don't know.  Read this:

http://www.boost.org/libs/smart_ptr/sp_techniques.html

it mentiones several instances of the "shared_ptr from this" problem.