Freeing individual memory allocations allocated by apr_pcalloc()

[Steve doh <tf...@hotmail.com>]

Hi,
I have a heavily used linked list of memory objects allocated using 
apr_pcalloc().
I have created a specific apr_pool just for this list.
How do I free the memory for a single object in this list after it has been 
unlinked from the list?
I would normally use the apr_pool_destroy() function but this would wipe out 
the whole linked list.
I can see that not freeing the unlinked objects will cause memory problems 
after the program has been running for a while.
What am I missing?

Thanks for you help

Regards
Steve

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Re[2]: Freeing individual memory allocations allocated by apr_pcalloc()

[David McIver <da...@optimatics.com>]

Tuesday, June 21, 2005 at 10:39:39 PM, Jeff typed:

JT> On 6/21/05, Steve doh <tf...@hotmail.com> wrote:
>> I have a heavily used linked list of memory objects allocated using
>> apr_pcalloc().
JT> ...
>> How do I free the memory for a single object in this list after it has been
>> unlinked from the list?

JT> you can't

Something like this may be a workable solution ...
. have your list data structure store the objects that have been unlinked
  from the list
. when you need a new object, use one of the previously unlinked objects
. only allocate a new abject if no unlinked ones are available.

At least this way the memory used by your list would be bounded.

Cheers,
David

Re: Freeing individual memory allocations allocated by apr_pcalloc()

[Jeff Trawick <tr...@gmail.com>]

On 6/21/05, Steve doh <tf...@hotmail.com> wrote:
> I have a heavily used linked list of memory objects allocated using
> apr_pcalloc().
...
> How do I free the memory for a single object in this list after it has been
> unlinked from the list?

you can't

> I can see that not freeing the unlinked objects will cause memory problems
> after the program has been running for a while.
> What am I missing?

APR pools may not be a match for the type of memory management that
this data structure requires.