From d43a68499e58f279aec136ce4e609732dbaf2d89 Mon Sep 17 00:00:00 2001
From: Julian Arnold <julian.arnold@ettus.com>
Date: Mon, 17 Nov 2014 16:53:58 -0800
Subject: b200: serialized access to get_rx/tx_stream

---
 host/lib/usrp/b200/b200_impl.hpp    | 2 ++
 host/lib/usrp/b200/b200_io_impl.cpp | 4 ++++
 2 files changed, 6 insertions(+)

(limited to 'host')

diff --git a/host/lib/usrp/b200/b200_impl.hpp b/host/lib/usrp/b200/b200_impl.hpp
index 613844ffc..8f03d81ad 100644
--- a/host/lib/usrp/b200/b200_impl.hpp
+++ b/host/lib/usrp/b200/b200_impl.hpp
@@ -117,6 +117,8 @@ private:
     boost::weak_ptr<uhd::rx_streamer> _rx_streamer;
     boost::weak_ptr<uhd::tx_streamer> _tx_streamer;
 
+    boost::mutex _transport_setup_mutex;
+
     //async ctrl + msgs
     uhd::msg_task::sptr _async_task;
     typedef uhd::transport::bounded_buffer<uhd::async_metadata_t> async_md_type;
diff --git a/host/lib/usrp/b200/b200_io_impl.cpp b/host/lib/usrp/b200/b200_io_impl.cpp
index 9f6d593fe..262c95f0d 100644
--- a/host/lib/usrp/b200/b200_io_impl.cpp
+++ b/host/lib/usrp/b200/b200_io_impl.cpp
@@ -256,6 +256,8 @@ boost::optional<uhd::msg_task::msg_type_t> b200_impl::handle_async_task(
  **********************************************************************/
 rx_streamer::sptr b200_impl::get_rx_stream(const uhd::stream_args_t &args_)
 {
+    boost::mutex::scoped_lock lock(_transport_setup_mutex);
+
     stream_args_t args = args_;
 
     //setup defaults for unspecified values
@@ -361,6 +363,8 @@ void b200_impl::handle_overflow(const size_t radio_index)
  **********************************************************************/
 tx_streamer::sptr b200_impl::get_tx_stream(const uhd::stream_args_t &args_)
 {
+    boost::mutex::scoped_lock lock(_transport_setup_mutex);
+
     stream_args_t args = args_;
 
     //setup defaults for unspecified values
-- 
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