]> > The Unix module publishes the type "file_descr" as an abstract type. > This makes it difficult to use file descriptors in some (IMHO) useful > ways. > > When I manage a large number of descriptors, an efficient technique to > is to use the descriptor as the index into an array of per-connection > data structures. But since the descriptor is abstract, I cannot use > it as an integer to do this. > > I know I can use hash-tables in ocaml to create a similar relationship > between (fd,data) but it is less efficient. Is there any kind of > interface to get the integral value of a file descriptor, or perhaps a > more encapsulated way to accomplish a similar result? I don't see why you cannot put the file_descr in a bigger structure with another counter, and use this counter instead of the file_descr number. Anyway, this beautiful function should do the trick (at least, on Unix systems): let fd_num (fd : Unix.file_descr)= (Obj.magic fd : int) - Fabrice ------------------- 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