INTERFACEUucontext ; FROM Ctypes IMPORT void_star; FROM Cstddef IMPORT size_t; TYPE (* 1024 bits, with size_t alignment, in glibc, though the kernel only supports 64 or 128 signals *) sigset_t = ARRAY[0..15] OF size_t; ucontext_t_star = void_star; END Uucontext.