SCM_CLASS_SYS_FLOCK   60 ext/fcntl/fcntl.c     SCM_SET_CLASS(f, SCM_CLASS_SYS_FLOCK);
SCM_CLASS_SYS_FLOCK   91 ext/fcntl/fcntl.c     return flock_allocate(SCM_CLASS_SYS_FLOCK, SCM_NIL);
SCM_CLASS_SYS_FLOCK   50 ext/fcntl/gauche/fcntl.h #define SCM_SYS_FLOCK_P(obj)  (SCM_XTYPEP(obj, SCM_CLASS_SYS_FLOCK))