Hello R-package-devel,
I have just completed porting the MonetDBLite package to use registered native
routines [1]. This worked fine except one minor issue: MonetDBLite (and I
suppose other software) extensively uses dlsym to find its own internal
functions. This used to rely on dlsym(dlopen(NULL, RTLD_NOW | RTLD_GLOBAL),
“some symbol”). However, in line with the new registration requirement, I
changed this to dlopen from the specific .so file that contains my package C
code. However, for this to work, I need a full path to the .so file in the
installed R package.
Now, I found that (conveniently), that path is contained in the DllInfo
structure that is passed to the registration function. All is well if I just
use that path. However, the DllInfo structure is opaque with a non-public
definition in Rdynpriv.h. I think thats fine, but would it be possible to
export a simple function like
void* R_get_dllinfo_path(DllInfo *dll) {
return strdup(dll->path);
}
so one can pull the library path for dlopen() purposes?
Best and thanks,
Hannes
[1]
https://cran.r-project.org/doc/manuals/r-release/R-exts.html#Converting-a-package-to-use-registration
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