C.4 Passing Data to and from External Predicates in C
These two functions are only meaningful inside C functions that have been
called from ECLiPSe as external predicates.
pword ec_arg(int i)
If inside a C function called from ECLiPSe, this returns the
i’th argument of the call.
- int ec_unify(pword,pword)
Unify the two given pwords. Note that, if attributed variables
are involved in the unification, the associated unification handlers
as well as subsequent waking will only happen once control is
returned to ECLiPSe.