oldmask           636 src/signal.c       ScmSysSigset *oldmask = make_sigset();
oldmask           640 src/signal.c       if (SIGPROCMASK(how, &(newmask->set), &(oldmask->set)) != 0) {
oldmask           643 src/signal.c       return SCM_OBJ(oldmask);