getDLLRegisteredRoutines {base}R Documentation

Reflectance Information for C/Fortran routines in a DLL


This function allows us to query the set of routines in a DLL that are registered with R to enhance dynamic lookup, error handling when calling native routines, and potentially security in the future. This function provides a description of each of the registered routines in the DLL for the different interfaces, i.e. .C, .Call, .Fortran and .External.


getDLLRegisteredRoutines(dll, addNames = TRUE)


dll a character string or DLLInfo object (as returned by getLoadedDLLs).
addNames a logical value. If this is TRUE, the elements of the returned lists are named using the names of the routines (as seen by R via registration or raw name). If FALSE, these names are not computed and assigned to the lists. As a result, the call should be quicker. The name information is also available in the NativeSymbolInfo objects in the lists.


This takes the registration information after it has been registered and processed by the R internals. In other words, it uses the extended information


A list with four elements corresponding to the routines registered for the .C, .Call, .Fortran and .External interfaces. Each element is a list with as many elements as there were routines registered for that interface. Each element identifies a routine and is an object of class NativeSymbolInfo. An object of this class has the following fields:

name the registered name of the routine (not necessarily the name in the C code).
address the memory address of the routine as resolved in the loaded DLL. This may be NULL if the symbol has not yet been resolved.
dll an object of class DLLInfo describing the DLL. This is same for all elements returned.
numParameters the number of arguments the native routine is to be called with. In the future, we will provide information about the types of the parameters also.


Duncan Temple Lang <>


"Writing R Extensions Manual" for symbol registration. R News, Volume 1/3, September 2001. "In search of C/C++ & Fortran Symbols"

See Also



dlls <- getLoadedDLLs()


[Package base version 2.5.0 Index]