xserver libX11 libxcb pixman mesa git update 20 Mar 2011

1 files changed, 35 insertions, 0 deletions

diff --git a/libxcb/src/xcb.h b/libxcb/src/xcb.h
index f781e87f9..b1bab44da 100644
--- a/libxcb/src/xcb.h
+++ b/libxcb/src/xcb.h
@@ -272,6 +272,41 @@ xcb_generic_event_t *xcb_wait_for_event(xcb_connection_t *c);
 xcb_generic_event_t *xcb_poll_for_event(xcb_connection_t *c);

 

 /**

+ * @brief Returns the next event or error that precedes the given request.

+ * @param c: The connection to the X server.

+ * @param request: The limiting sequence number.

+ * @return The next event from the server.

+ *

+ * Returns the next event or error with a sequence number less than or

+ * equal to the given sequence number, or returns NULL if no such event can

+ * ever arrive. Blocks until either a suitable event or error arrive, or a

+ * response arrives that proves no such event is coming, or an I/O error

+ * occurs.

+ *

+ * After processing a request, the X server sends responses in a specific

+ * order. First come any events that the request generated, then any

+ * replies for the request, then the error response if there is one. After

+ * that, the server may spontaneously send more events with the same

+ * sequence number, which are not related to that request.

+ *

+ * This function will always return events from the pre-reply phase of the

+ * specified request. It may also return events from the unrelated

+ * post-reply stream, as long as they have the same sequence number.

+ *

+ * This function is useful for callers that need to process responses in

+ * wire-order.

+ *

+ * Implementation note: You cannot currently use this function to ensure

+ * that you process responses in exactly wire-order, because depending on

+ * the sequence of calls you make and the timing of server responses,

+ * post-reply events with the same sequence number may be returned as part

+ * of the pre-reply event stream, even though they were separated by a

+ * reply or error. In practice this kind of error is unlikely to matter,

+ * but it may be fixed in the future.

+ */

+xcb_generic_event_t *xcb_wait_for_event_until(xcb_connection_t *c, unsigned int request);

+

+/**

  * @brief Return the error for a request, or NULL if none can ever arrive.

  * @param c: The connection to the X server.

  * @param cookie: The request cookie.