+static inline int ustream_pending_data(struct ustream *s, bool write)
+{
+ struct ustream_buf_list *b = write ? &s->w : &s->r;
+ return b->data_bytes;
+}
+
+static inline bool ustream_read_buf_full(struct ustream *s)
+{
+ struct ustream_buf *buf = s->r.data_tail;
+ return buf && buf->data == buf->head && buf->tail == buf->end &&
+ s->r.buffers == s->r.max_buffers;
+}
+