uhd: Introduce I/O service manager

- Implement I/O service detach link methods
- The I/O service manager instantiates new I/O services or connects
  links to existing I/O services based on options provided by the user
  in stream_args.
- Add a streamer ID parameter to methods to create transports so that
  the I/O service manager can group transports appropriately when using
  offload threads.
- Change X300 and MPMD to use I/O service manager to connect links to
  I/O services.
- There is now a single I/O service manager per rfnoc_graph (and it is
  also stored in the graph)
- The I/O service manager now also knows the device args for the
  rfnoc_graph it was created with, and can make decisions based upon
  those (e.g, use a specific I/O service for DPDK, share cores between
  streamers, etc.)
- The I/O Service Manager does not get any decision logic with this
  commit, though
- The MB ifaces for mpmd and x300 now access this global I/O service
  manager
- Add configuration of link parameters with overrides

Co-Authored-By: Martin Braun <martin.braun@ettus.com>
Co-Authored-By: Aaron Rossetto <aaron.rossetto@ni.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/host/lib/include/uhdlib/transport/links.hpp b/host/lib/include/uhdlib/transport/links.hpp
index 64673f02f..09872b145 100644
--- a/host/lib/include/uhdlib/transport/links.hpp
+++ b/host/lib/include/uhdlib/transport/links.hpp
@@ -16,8 +16,7 @@ namespace uhd { namespace transport {
 enum class link_type_t { CTRL = 0, ASYNC_MSG, TX_DATA, RX_DATA };
 
 //! Contains all information regarding a link interface
-using both_links_t = std::tuple<uhd::transport::io_service::sptr,
-    uhd::transport::send_link_if::sptr,
+using both_links_t = std::tuple<uhd::transport::send_link_if::sptr,
     size_t, // num_send_frames
     uhd::transport::recv_link_if::sptr,
     size_t, // num_recv_frames