Hi,
Is there a way to override the >>xxx xxx>> accessors?
The reason I ask is I have code in the BerkeleyDB interface I'm
working on that looks as follows:
: <DB-ENV> ( -- DB-ENV/f )
[let | err [ 0 <int> ] |
0 err db_env_creat err *int [ \ DB-ENV new swap alien-address
>>dbenv ] db-item-create ] ;
The db_env_creat routine is returning a pointer to a DB_ENV. This
gets treated as a ALIEN: by factor, and I can't assign that to the
>>dbenv write accessor (hence the call to alien-address, which ends
up necessitating a later call like 'dbenv>> <alien>' when I need the
value in dbenv). What I would like to do is to override >>dbenv to
accept a ALIEN: . Or alternatively to have the >>dbenv and dbenv>>
automatically do the translation.
Status:
I have basic operations working for BerkeleyDB. I also have
interfaces for DB_ENV, DB, Cursors, Sequences, and Transactions. Some
of the interfaces are touchy and are going through some refactoring.
Currently you can open a DB and a DB_ENV, write to it, and close it.
I'm not real happy with my read interface so its going through some
changes. The approached I took with the interface was to create a
separate set of C routines that hide the DB_ENV->xxx() calls. It also
allows me to place the out parameters at the end of the function
which allowed me to eliminate a lot of the stack shuffling. I took
the C interface code from Elephant which is a persistent object store
for Lisp and modified it for my needs.
Thanks,
Glenn
V. Glenn Tarcea
[EMAIL PROTECTED]
Hey brother, can you paradigm?
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