]> Right, In Ensemble that code was commented out, because the feature did not entirely work in ocaml-3.04. I've just committed the change to CVS, so you can take a look at it there. The idea is to take an ML memory-object and marshal it directly to C malloced buffers, instead of first converting it into a string using Marshal, and then making a copy of it to a C buffer. The reverse works the same way, except that you can get from the network an array of C-iovecs, and you'd like to unmarshal that, at low cost, into an ML memory object. The basic code is in socket/s/mm.c, look for mm_input_val, and mm_output_val. These functions are used from socket/s/socket.ml. In ocaml terms, the basic supporting functions are (intext.h): CAMLextern long output_value_to_block(value v, value flags, char * data, long len); /* Output [v] with flags [flags] to a user-provided memory buffer. [data] points to the start of this buffer, and [len] is its size in bytes. Return the number of bytes actually written in buffer. Raise [Failure] if buffer is too short. */ CAMLextern value input_value_from_block(char * data, long len); /* Read a structured value from a user-provided buffer. [data] points to the beginning of the externed data in this buffer, and [len] is the length in bytes of valid data in this buffer. The buffer is never deallocated by this routine. */ By now I've interfaced the C-Ensemble interface, with JNI, and I can tell you that this feature is not supported in Java. Ohad. ----------------------------------------------------------------------------------- Ohad Rodeh tel: +972-3-6401641 IBM Haifa, storage research Brian Naylor <bwv211mail@yahoo To: Ohad Rodeh/Haifa/IBM@IBMIL .com> cc: Subject: Re: [Caml-list] direct marshaling C<-->ML works in 3.05 31/07/2002 17:53 Hi. Can you give me a reference for what you mean by 'direct marshalling'? Does this somehow bypass the Marshal library? I have the Ensemble code base (there's a lot of it!) so I can follow a specific pointer if you have one. Thanks! --- Ohad Rodeh <ORODEH@il.ibm.com> wrote: > Direct marshaling between ML memory-objects and C io-vectors works great > with the new release (3.05). __________________________________________________ Do You Yahoo!? Yahoo! Health - Feel better, live better http://health.yahoo.com ------------------- To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ Beginner's list: http://groups.yahoo.com/group/ocaml_beginners