X-Git-Url: http://git.archive.openwrt.org/?p=project%2Flibubox.git;a=blobdiff_plain;f=ustream.h;h=6431744155f810f5c8d2b8d3a4b57c47de60e490;hp=d9f98b78e86b1a7c22f6a8d918060422e59e1b3f;hb=11e8afea0f7eb34f8c23a8e589ee659c46f3f8aa;hpb=dc69ce4799deb53797266d55311871b9c0062066

diff --git a/ustream.h b/ustream.h
index d9f98b7..6431744 100644
--- a/ustream.h
+++ b/ustream.h
@@ -52,7 +52,7 @@ struct ustream {
 	struct ustream *next;
 
 	/*
-	 * notify_read:
+	 * notify_read: (optional)
 	 * called by the ustream core to notify that new data is available
 	 * for reading.
 	 * must not free the ustream from this callback
@@ -68,7 +68,7 @@ struct ustream {
 	void (*notify_write)(struct ustream *s, int bytes);
 
 	/*
-	 * notify_state:
+	 * notify_state: (optional)
 	 * called by the ustream implementation to notify that the read
 	 * side of the stream is closed (eof is set) or there was a write
 	 * error (write_error is set).
@@ -163,6 +163,19 @@ static inline bool ustream_read_blocked(struct ustream *s)
 	return !!(s->read_blocked & READ_BLOCKED_USER);
 }
 
+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;
+}
+
 /*** --- functions only used by ustream implementations --- ***/
 
 /* ustream_init_defaults: fill default callbacks and options */