Add sleep function to dboard_iface

Having this function allows a dboard_iface implementation to be aware of
the timing of various calls such as SPI and register writes.

1 files changed, 31 insertions, 0 deletions

diff --git a/host/lib/usrp/dboard_iface.cpp b/host/lib/usrp/dboard_iface.cpp
new file mode 100644
index 000000000..2a04095e8
--- /dev/null
+++ b/host/lib/usrp/dboard_iface.cpp
@@ -0,0 +1,31 @@
+//
+// Copyright 2016 Ettus Research
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/usrp/dboard_iface.hpp>
+
+using namespace uhd::usrp;
+
+void dboard_iface::sleep(const boost::chrono::nanoseconds& time)
+{
+   //nanosleep is not really accurate in userland and it is also not very
+   //cross-platform. So just sleep for the minimum amount of time in us.
+   if (time < boost::chrono::microseconds(1)) {
+      boost::this_thread::sleep_for(boost::chrono::microseconds(1));
+   } else {
+      boost::this_thread::sleep_for(time);
+   }
+}