The
foreign-symbol-address
function is used to find out whether a foreign symbol is defined, by looking for it in the foreign-symbol table. If its associated object code has been loaded into the image, its address is returned. Otherwise nil is returned, unless
errorp
is
nil
.
The
errorp
keyword defines the behavior of the function when a symbol has not been defined. If it is non-
nil
(which is the default value), then an error will be signalled. If it is
nil
, no error will be reported, and the function will return
nil
.
The
functionp
keyword is used to specify the kind of symbol sought. If it is
t
,
foreign-symbol-address
will assume that
name
is the name of a function. If it is
nil
it will assume that
name
is the name of a variable. The default value is
t
.