CL_CATCH_ALL — Create a protected region.CL_UNWIND_PROTECT — Create a protected region.cl_boot — Setup the lisp environment.cl_shutdown — Close the lisp environment.ecl_set_option — Set a boot option.ecl_get_option — Read the value of a boot option.ecl_clear_interrupts — Clear all pending signals and exceptions.ecl_disable_interrupts — Postpone handling of signals and exceptions.ecl_enable_interrupts — Activate handling of signals and exceptions.