Re: Re: Zend Engine.

I've yet to see sample code and a succint question about it. The things you've asked so far are really general and have been covered elsewhere. I suggest that you look at the (limited) zend api docs and also search for conference slides from internals talks that have been given over the years. If you're feeling dedicated, I suggest that you purchase George Schlossnagle's book "Advanced PHP Programming". We're happy to help, but only if you do some legwork yourself first. --Wez. On 7/8/05, herrwitten@php.net <herrwitten@php.net> wrote: > > On Jul 8, 2005, at 1:50 PM, Michael Wallner wrote: > > > herrwitten@php.net wrote: > > > > > >> I have read through many modules and through Zend internals, > >> but I can't figure out what I need to do. > >> > > > > Did you read a book about C programming so far? > > You must not free anything more than once. > > > > It's not a good idea to start writing a PHP extension > > without learning some C basics (and probably more) -- > > I know that, because I made the same mistake like you > > and tried to cook up some C code with minimal knowledge. > > > > Most of the time you'll want to use > > zval_ptr_dtor(zval **) to "destroy" zvals, because > > it takes care about the refcount and only frees the > > "contents" of the zval if the refcount reaches 0. > > > > It's just (bad) luck when the memory at the address of > > a freed location still contains the data you expect. > > > > I know it's very hard to get answers about php/ext coding, > > so it is even more important to ask the questions in a > > meaningful way. You'll also find many unanswered questions > > of mine in the archive. > > > > The pecl/http repository contains thousands of "blood & sweat" > > lines of code, perhaps you can find some answers there. > > > > Regards, > > Mike > > Hey Mike, > > Thanks for the response. > > For the record and my ego, I have been a C programmer for a long > time, and I have done extensive work in C++. > > My email with the multiple frees was an illustration of my > frustration with the inconsistencies I had experienced. I am sorry > that everyone is so caught up on that one email, because I asked a > lot of direct questions in other emails. > > The Zend engine is really powerful, but it is sloppy, and I am having > trouble figuring out the logic of it. > > -- > PECL development discussion Mailing List (http://pecl.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > >