[elephant-devel] Problem with LWW 5.1.2, BDB-backend

Mon Dec 7 21:46:25 UTC 2009

Hello Elliott & Jan,

ty a lot for the DLLs - especially the libberkeley-db.dll saved me may
be hours today looking in the gcc & dlltool docs...

But - now it seems LWW can talk to the DLLs & DB, but:

1. in the OPEN-CONTROLLER (in the bdb-controller.lisp) I get some new
errors now :
    - (db-env-set-max-locks env max-locks) gives error 22 - invalid argument..
    - (db-env-set-max-transactions env max-transactions) - the same
I didn't found them in the "Environment Configuration" of the
"Environments" section of the 4.7.25 docs, so I tought may be they
stayed in the Lisp code from previous BDB versions and commented them
out. (Even if I oversee something I suppose BDB has it's defaults for
that at least)
2. but when in the same method DB-ENV-OPEN gets called - I again get
the error 22 : Invalid argument.

>From what I see in the code - the invocation uses meaningfull
arguments, putting some debug statements tells that at least on the
Lisp side we have the right constant-values which correspond with the
"db.h"-declarations.

So - I'm a step further with your help, but still can't even open a
database. I hope - there is a solution. Of course, I could try to make
the binding using directly the LW FFI, but that would be sad private
solution or unnesessery source fragmentation when there is UFFI/CFFI
as a base.

(Now I use BDB 4.7.25, the newest UFFI in front of CFFI and the DLLs I
receved today)

If there is a chance for help - I would be very happy.

On Mon, Dec 7, 2009 at 7:34 PM, Elliott Slaughter
<elliottslaughter at gmail.com> wrote:
> Here are the dlls I built for the newest version of Elephant with BDB
> 4.7.25. If they work for you, then Ian can put them on the project page.
> Hope this helps.
>
> On Mon, Dec 7, 2009 at 10:21 AM, Ian Eslick <eslick at media.mit.edu> wrote:
>>
>> Elliott said he was going to give this a shot. You might correspond with
>> him directly.  -Ian
>> On Dec 7, 2009, at 12:09 AM, Plamen . wrote:
>>
>> > Hello Ian,
>> >
>> > thank you for the quick response!
>> >
>> > On Sun, Dec 6, 2009 at 5:44 PM, Ian Eslick <eslick at media.mit.edu> wrote:
>> >> Hey, quick answers:
>> >>
>> >> 1) In the online FAQ you'll notice that you have to ensure that you are
>> >> using uffi and not the uffi compatibility package from cffi.
>> >
>> > Ok, had missed that...
>> >
>> >> 2) The prebuilt DLLs are not up to date (sorry!), they need to be made
>> >> current against BDB 4.7 which Elephant 1.0 depends on.
>> >
>> > Ok, had no idea from the doc or source that 4.7 is the current target,
>> > but that's even better.
>> >
>> >> 3) We have one or two lispworks users that I'm aware of, so it should
>> >> work, but I can't rule out a lispworks specific problem, although I think #1
>> >> and #2 above explain what you're seeing.
>> >>
>> >> Are you a position to build the DLLs yourself?
>> >
>> > Haven't touched C for years now and never had the pleasure with cygwin
>> > but now I'll try it :)
>> >
>> >>
>> >> Ian
>> >>
>> >> On Dec 5, 2009, at 5:28 AM, Plamen . wrote:
>> >>
>> >>> Hello,
>> >>> I need to use BDB for my current application and from what I see on
>> >>> the net, elephant seems to be the most mature and functional solution.
>> >>> After following the installation instructions (I use LispWorks 5.1.2
>> >>> for Windows - yes - I need that configuration at the moment, with
>> >>> Berkeley DB 4.5.20, with prebuild DLLs (libberkeley-db.dll and
>> >>> libmemutil.dll) in the elephant-root and from what I see a correct
>> >>> my-config.sexp also in the elephant-root directory), after loading
>> >>> Elephant I get the following error :
>> >>> ELE-USER 13 > (open-store '(:bdb "/temp/db2/"))
>> >>> Error: The call (#<Function DB-BDB::%DB-ENV-CREATE 22053092> 0) does
>> >>> not match definition (#<Function DB-BDB::%DB-ENV-CREATE 22053092>
>> >>> DB-BDB::FLAGS DB-BDB::ERRNO).
>> >>> From what I see in the sources - there are 3 relevant definitions :
>> >>> 1. the BDB one :
>> >>>
>> >>> db_env_create
>> >>>
>> >>> ________________________________
>> >>>
>> >>> #include <db.h>
>> >>>
>> >>> int
>> >>> db_env_create(DB_ENV **dbenvp, u_int32_t flags);
>> >>>
>> >>> 2. then the libberkeley-db one :
>> >>>
>> >>> DB_ENV *db_env_cr(u_int32_t flags, int *errno) {
>> >>>  DB_ENV *envp;
>> >>>  *errno = db_env_create(&envp, flags);
>> >>>  return envp;
>> >>> }
>> >>>
>> >>> 3. and finally the Lisp definitions :
>> >>>
>> >>> (def-function ("db_env_cr" %db-env-create)
>> >>>    ((flags :unsigned-int)
>> >>>     (errno :int :out))
>> >>>  :returning :pointer-void)
>> >>>
>> >>> (defun db-env-create ()
>> >>>  "Create an environment handle."
>> >>>  (multiple-value-bind (env errno)
>> >>>      (%db-env-create 0)
>> >>>    (declare (type fixnum errno))
>> >>>    (if (= errno 0)
>> >>>       env
>> >>>       (error 'db-error :errno errno))))
>> >>>
>> >>> I have cffi_0.10.5 and uffi-1.6.2 (which are currently the newest
>> >>> versions of that libraries).
>> >>>
>> >>> The call (%db-env-create 0) in the db-env-create function looks of
>> >>> course weird for me, but if people use these lines of source on all
>> >>> other Lisp-implementations, obviously I miss something. I know the LW
>> >>> FFI, but I'm not really proficient in the CFFI/UFFI-conversion to see
>> >>> the missing parts, but if there is someone outside in the WWW who runs
>> >>> LWW & BDB and/or knows how to help, I would be very gratefull.
>> >>>
>> >>> Regards
>> >>> Plamen
>> >>>
>> >>> _______________________________________________
>> >>> elephant-devel site list
>> >>> elephant-devel at common-lisp.net
>> >>> http://common-lisp.net/mailman/listinfo/elephant-devel
>> >>
>> >>
>> >> _______________________________________________
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>> >> elephant-devel at common-lisp.net
>> >> http://common-lisp.net/mailman/listinfo/elephant-devel
>> >>
>> >
>> > _______________________________________________
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>>
>>
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>
>
>
> --
> Elliott Slaughter
>
> "Don't worry about what anybody else is going to do. The best way to predict
> the future is to invent it." - Alan Kay
>
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