@deftypefun {int} {gnutls_pkcs11_add_provider} (const char * @var{name}, const char * @var{params})
@var{name}: The filename of the module

@var{params}: should be NULL or a known string (see description)

This function will load and add a PKCS 11 module to the module
list used in gnutls. After this function is called the module will
be used for PKCS 11 operations.

When loading a module to be used for certificate verification,
use the string 'trusted' as  @code{params} .

Note that this function is not thread safe.

@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS}  (0) is returned, otherwise a
negative error value.

@strong{Since:} 2.12.0
@end deftypefun