persistent memory management

Hi. I am trying to make my first php extension :) I am sorry, if the question would be too newbiesh, but I just couldn't find a more correct place to ask here is the code: http://loccache.googlecode.com/svn/trunk/loccache.c I am trying to do the following: at the minit-phase I am allocating a persistent HashTable extension has 4 funcitons: * loc_set($namespace, $varname, $value); // stores $value * loc_get($namespace, $varname) // returns $value from storage * loc_isset($namespace, $varname) // returns bool * loc_unset($namespace, $varname) // removes varname from storage during loc_set, I chech if there is "$namespace" item in my persistent hashtable, and if there isn't, I create it as a child hashtable $varname is a key in that second HashTable and $value is the value something like: $big_persistent_hash = array(

    $namespace => array(
        $varname => $value
    )

); extension build and even tends to work... kinda.. unfortunately, persistent values are not too persistent in my case, and i keep getting memory errors. I would be grateful for any help. the source code is not too big :)