int rb_bh_free(rb_bh *, void *);
void *rb_bh_alloc(rb_bh *);
rb_bh *rb_bh_create(size_t elemsize, int elemsperblock, const char *desc);
int rb_bh_free(rb_bh *, void *);
void *rb_bh_alloc(rb_bh *);
rb_bh *rb_bh_create(size_t elemsize, int elemsperblock, const char *desc);