SCM_API void *scm_without_guile (void *(*func)(void *), void *data);
SCM_API void *scm_with_guile (void *(*func)(void *), void *data);
+SCM_INTERNAL void scm_i_reset_fluid (size_t, SCM);
SCM_INTERNAL void scm_threads_prehistory (void *);
SCM_INTERNAL void scm_init_threads (void);
SCM_INTERNAL void scm_init_thread_procs (void);