| library.dynam {base} | R Documentation |
Load the specified file of compiled code if it has not been loaded already, or unloads it.
library.dynam(chname, package = NULL, lib.loc = NULL,
verbose = getOption("verbose"),
file.ext = .Platform$dynlib.ext, ...)
library.dynam.unload(chname, libpath,
verbose = getOption("verbose"),
file.ext = .Platform$dynlib.ext)
.dynLibs(new)
chname |
a character string naming a shared library to load. |
package |
a character vector with the names of packages to search
through, or NULL. By default, all packages in the search
path are used. |
lib.loc |
a character vector describing the location of R
library trees to search through, or NULL. The default value
of NULL corresponds to all libraries currently known. |
libpath |
the path to the loaded package whose shared library is to be unloaded. |
verbose |
a logical value indicating whether an announcement is printed on the console before loading the shared library. The default value is taken from the verbose entry in the system options. |
file.ext |
the extension to append to the file name to specify the library to be loaded. This defaults to the appropriate value for the operating system. |
... |
additional arguments needed by some libraries that
are passed to the call to dyn.load to control
how the library is loaded. |
new |
a list of DLLInfo objects corresponding to the shared libraries loaded by packages. |
library.dynam is designed to be used inside a package rather
than at the command line, and should really only be used inside
.First.lib or .onLoad. The
system-specific extension for shared libraries
(e.g., ‘.so’ or ‘.sl’ on Unix systems)
should not be added. Note that to allow for versioned installs, the
first argument should not be set to the pkgname argument of
.First.lib or .onLoad.
library.dynam.unload is designed for use in
.Last.lib or .onUnload.
.dynLibs is used for getting or setting the shared libraries
which were loaded by packages (using library.dynam). Versions
of R prior to 2.1.0 simply recorded the (names of) packages which had
loaded shared libraries. Versions of R prior to 1.6.0 used an
internal global variable .Dyn.libs for storing this
information: this variable is now defunct.
If chname is not specified, library.dynam returns an
object of class "DLLInfoList" corresponding to the shared
libraries loaded by packages.
If chname is specifed, an object of class "DLLInfo" that
identifies the DLL and can be used in future calls is returned
invisibly. For packages that have namespaces, a list of these objects
is stored in the namespace's environment for use at run-time.
library.dynam.unload invisibly returns an object of class
"DLLInfo" identifying the DLL successfully unloaded.
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
getLoadedDLLs for information on DLLInfo and DLLInfoList
objects.
.First.lib, library,
dyn.load, .packages,
.libPaths
SHLIB for how to create suitable shared libraries.
## Which DLLs were "dynamically loaded" by packages? library.dynam()