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From miked@nag.co.ukWed Oct 18 18:52:37 1995 Date: Wed, 18 Oct 1995 14:23:18 +0000 (BST) From: Mike Dewar <miked@nag.co.uk> To: acn1 <acn1%cam.ac.uk@maths.bath.ac.uk> Subject: Interface for dynamic opening and closing of libraries Arthur: I've discussed the specification of the "dynamic libraries" interface with Barry and this is what we think we need. For a user's own code, we will always know the full pathname of the library it is in, so we can load the module explicitly. 1. A function that loads a particular module from a particular library, e.g. (load-module <module> <pathname>) The library need not be open for input. You might wish to have separate open-library, load-module, and close-library operations if that is more efficient. 2. A function that opens a library for output, e.g. (open-library <pathname>) The function need not be responsible for checking if the library is open already. 3. A function that reads a lisp source file, translates it into byte codes, and writes the results into a named library, e.g. (fasl-out <filename> <library>) This could either: (a) Overwrite an existing module with the same name (our preferred option), or (b) replace the entire library if it already exists. 4. A function that closes an open library and, if option 3a above is implemented, does all the necessary tidying-up, compaction etc, e.g. (close-library <pathname>) 5. Facilities for setting the library search path from within Lisp: (a) deleting a library from the search path; (b) adding a new library to the front of the search path; (c) adding a new library to the end of the search path. Let me know what you think of this. I had trouble sending email to you yesterday and today, so please let me know when/if this message arrives! Regards, Mike. -- --------------------------------------------------------------------------- Mike Dewar email: miked@nag.co.uk AXIOM System Coordinator phone: (+44) 1865 511245 NAG Ltd. fax: (+44) 1865 311205 Wilkinson House, Jordan Hill Rd, Oxford, OX2 8DR ---------------------------------------------------------------------------