send_fds(): Handle too many outstanding FDs to send

Before this patch, the following code caused an endless loop in send_fds(),
because the queue of FDs to send was eventually full, but _xcb_out_flush_to()
didn't make any progress, since there was no request to send:

   while (1) { xcb_send_fd(conn, dup(some_fd)); }

Fix this by sending a sync when flushing didn't make any progress. That way we
actually have something to send and can attach the pending FDs.

Because send_fds() can now send requests, the code in
xcb_send_request_with_fds64() has to be changed. It has to call send_fds()
before it establishes a good sequence number for the request it wants to send.

Signed-off-by: Uli Schlachter <psychon@znc.in>

0 files changed, 0 insertions, 0 deletions