-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 D. Richard Hipp wrote: > suggest API or functionality changes, now would be a good to to do so,
I have a few in no particular order, based on currently implementing vfs in my Python SQLite wrapper. I would like a #define of the current version number. This allows me to cause compile time failure if it is different than my code expects. (Under the hood I allow "inheritance" from existing vfs so I runtime detect if the versions mismatch but would prefer to catch it earlier.) There is no way to pass back error text, only error codes. Some method for also setting error text would be nice and more user friendly. Although you encourage never deleting a vfs, but rather replacing with one of the same name, I would like some safety checks since from a dynamic language environment that can only be achieved by leaking memory. For example I currently add something to my normal sqlite3_open_v2 wrapper to catch which vfs is used and if it is one of mine then increment reference counts. That way I can know for sure if a vfs is in use and not call unregister. There is still a theoretical race condition between unregistering at the same time as someone tries to use it, but that won't happen in Python due to the global interpreter lock. I'd like the xFileControl method to also take a parameter saying how big the pArg is. That makes it possible to use from a non-C environment, and would add extra safety in a C environment. (For example in a wrapper I can't return anything since I have no idea how big the area is.) I'd like a "not implemented" error code. You could then fallback to the default vfs if necessary. For example a NULL for xDlOpen is treated as not implemented, but if I supply a callback into Python, that code can't respond based on runtime determination that it isn't implemented. I'd also prefer the documentation to be in the wiki so people who use it can update it as they discover various issues. The doc is currently duplicated in http://www.sqlite.org/34to35.html and http://www.sqlite.org/c3ref/vfs.html Roger -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFIG+ptmOOfHg372QQRAgSXAKDQVphZCHfWe1smV/+OjgbTQD8rNQCeK8Ya 7HDM/jDhgEPexr803lJi+AM= =lZqJ -----END PGP SIGNATURE----- _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
