I recently had to create a class that managed a pool of objects for the user. Instead of the user creating the object themselves they would ask the class for an object. The class would hand the user a boost::shared_ptr of the object. When the boost::shared_ptr needed to destroy the object it handed it back to the class to reuse. The class is designed for those areas that need a lot of the same object but not all at the same time. This class has been useful for the boost::asio library where the async_receive and async_write need the buffer to be valid until the callback occurs. Other people at my work have shown interest and I'm looking at needing to improve the class to make it more general. Instead of spending time doing the improvements I would like to know if the boost libraries have anything like what I described. I'll looked through the descriptions but haven't seen anything that comes close. Ryan
Hi Ryan,
I am not familiar with the library, nor the paradigm, but
Boost.FlyWeight seems to do something similar.
Best,
Dee
On Wed, Feb 17, 2010 at 9:31 AM, Ryan McConnehey
I recently had to create a class that managed a pool of objects for the user. Instead of the user creating the object themselves they would ask the class for an object. The class would hand the user a boost::shared_ptr of the object. When the boost::shared_ptr needed to destroy the object it handed it back to the class to reuse. The class is designed for those areas that need a lot of the same object but not all at the same time. This class has been useful for the boost::asio library where the async_receive and async_write need the buffer to be valid until the callback occurs. Other people at my work have shown interest and I'm looking at needing to improve the class to make it more general. Instead of spending time doing the improvements I would like to know if the boost libraries have anything like what I described. I'll looked through the descriptions but haven't seen anything that comes close.
Ryan _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
Ryan McConnehey wrote:
I recently had to create a class that managed a pool of objects for the user. Instead of the user creating the object themselves they would ask the class for an object. The class would hand the user a boost::shared_ptr of the object. When the boost::shared_ptr needed to destroy the object it handed it back to the class to reuse. The class is designed for those areas that need a lot of the same object but not all at the same time. This class has been useful for the boost::asio library where the async_receive and async_write need the buffer to be valid until the callback occurs. Other people at my work have shown interest and I'm looking at needing to improve the class to make it more general. Instead of spending time doing the improvements I would like to know if the boost libraries have anything like what I described. I'll looked through the descriptions but haven't seen anything that comes close.
Ryan
Hi Ryan - Did you take a look at Boost.Pool? http://www.boost.org/doc/libs/1_42_0/libs/pool/doc/index.html regards - -- ---------------------------------- Michael Caisse Object Modeling Designs www.objectmodelingdesigns.com
Michael Caisse wrote:
Ryan McConnehey wrote:
I recently had to create a class that managed a pool of objects for the user. Instead of the user creating the object themselves they would ask the class for an object. The class would hand the user a boost::shared_ptr of the object. When the boost::shared_ptr needed to destroy the object it handed it back to the class to reuse. The class is designed for those areas that need a lot of the same object but not all at the same time. This class has been useful for the boost::asio library where the async_receive and async_write need the buffer to be valid until the callback occurs. Other people at my work have shown interest and I'm looking at needing to improve the class to make it more general. Instead of spending time doing the improvements I would like to know if the boost libraries have anything like what I described. I'll looked through the descriptions but haven't seen anything that comes close.
Ryan
Hi Ryan -
Did you take a look at Boost.Pool?
http://www.boost.org/doc/libs/1_42_0/libs/pool/doc/index.html
regards -
I have taken a look at Boost.Pool. I didn't think it meet my requirements. If I understand Boost.Pool correctly, when malloc is called the pool creates the size of the item desired and passes a pointer to the user. The pool still retains ownership of the resource. This would be how when pool is destroyed it can delete all items that had been malloc()'ed. The pool I'm talking about gives the user complete ownership of the item, upon "malloc()'ed", in the form of a boost::shared_ptr. Only when the user is done with the item is it return to the pool. If the pool is destroyed before the item is returned the item is still valid until the user is done with it. Once the user is done with the item and the pool is already destroyed then the item is also destroyed. (I checked my original post and realized that the requirement of the pool being destroyed and the object still being valid was not mentioned. I apologize.) Ryan
participants (3)
-
Diederick C. Niehorster -
Michael Caisse -
Ryan McConnehey