RFNoC: Add xport disconnect callbacks

Transports were not disconnecting their links from the I/O service upon
destruction, leaving behind inaccessible send and recv links used by
nothing.  This led to I/O errors after creating several transports.

Added callbacks to transports to automatically disconnect their links
from the I/O service when the transport is destroyed.  Updated all
callers to supply a disconnect callback.

Signed-off-by: michael-west <michael.west@ettus.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/host/lib/include/uhdlib/transport/io_service.hpp b/host/lib/include/uhdlib/transport/io_service.hpp
index 62dfdfe0d..0cc2f86e3 100644
--- a/host/lib/include/uhdlib/transport/io_service.hpp
+++ b/host/lib/include/uhdlib/transport/io_service.hpp
@@ -78,6 +78,13 @@ using recv_callback_t =
     std::function<bool(frame_buff::uptr&, recv_link_if*, send_link_if*)>;
 
 /*!
+ * Callback to disconnect links.  This allows a function to be registered
+ * that can call back to the io_service_mgr to completely disconnect the
+ * links.
+ */
+using disconnect_callback_t = std::function<void()>;
+
+/*!
  * Interface for a recv transport to request/release buffers from a link. A
  * recv transport is a transport with a primary purpose of receiving data, and
  * the recv_io_if class interacts with the io_service to schedule the data