I've developed a PHP5 client extension for a server application i wrote, and so far it's working quite well, but it doesn't support persistent connections yet. Since this is something i want to implement before releasing the first stable version, i was searching for documentation about persistance and found the persistent allocation routines ( pemalloc, pecalloc, etc ). What i can't understand is how to retrieve a persistently allocated object upon new requests, i mean, let's say that the persistent id of a connection is:
<hostname>:<port>:<timeout>
How do i save ( or check if it was already created ) the connection object ( which is a C structure, not a zval or anything strictly PHP related ) ? How can i retrieve it later given its id ?
PS: I know about PHP persistent streams ( i've studied the pfsockopen C sources ), but i use a C client library so i can't access the socket directly or modify the C client library to use php streams instead of plain sockets.
Thanks.
Found the solution, it seems there's a "persistent_list" hash object, so I'm able to do:
zend_hash_find(&EG(persistent_list), ...
To find persistent data ( allocd with pemalloc obviously ), and
zend_hash_update(&EG(persistent_list), ...
To save new instances.
( Found this in the PostgreSQL php extension source code. )
http://devzone.zend.com/446/extension-writing-part-iii-resources/#Heading8
Anyone interested in my approach, it's here https://github.com/evilsocket/phpgibson