dyn.unload

2 messages · Christian Hennig, Brian Ripley

Wed, Feb 6, 2002 2:11 AM #

Dear list,

I want to write a package which loads a C library dynamically.

It seems that it is not possible to unload the library using dyn.unload
(for example with detach, .Last.lib)
if it has been loaded with library.dynam in .First.lib.

dyn.unload in my experience only unloads libraries
successfully which have been loaded by dyn.load.

So how to unload libraries which were loaded in .First.lib (dyn.load seems
to be discouraged for .First.lib)?

Christian

***********************************************************************
Christian Hennig
Seminar fuer Statistik, ETH-Zentrum (LEO), CH-8092 Zuerich (current)
and Fachbereich Mathematik-SPST/ZMS, Universitaet Hamburg
hennig at stat.math.ethz.ch, http://stat.ethz.ch/~hennig/
hennig at math.uni-hamburg.de, http://www.math.uni-hamburg.de/home/hennig/
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ich empfehle www.boag.de


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Brian Ripley

Wed, Feb 6, 2002 2:19 AM #

On Wed, 6 Feb 2002, Christian Hennig wrote:

And as library.dynam calls dyn.load, that includes those loaded by
library.dynam!  Are you calling dyn.unload with the correct argument?

There is a working example in library(tcltk) under Windows.  You need
also to remove the entry in .Dyn.libs for library.dynam to work on
the same package again.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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