uhd: squashed transport work

1 files changed, 64 insertions, 0 deletions

diff --git a/host/lib/transport/simple_claimer.hpp b/host/lib/transport/simple_claimer.hpp
new file mode 100644
index 000000000..3bbc49a05
--- /dev/null
+++ b/host/lib/transport/simple_claimer.hpp
@@ -0,0 +1,64 @@
+//
+// Copyright 2012 Ettus Research LLC
+//
+// 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/>.
+//
+
+#ifndef INCLUDED_LIBUHD_TRANSPORT_SIMPLE_CLAIMER_HPP
+#define INCLUDED_LIBUHD_TRANSPORT_SIMPLE_CLAIMER_HPP
+
+#include <uhd/config.hpp>
+#include <boost/thread/condition.hpp>
+#include <boost/thread/mutex.hpp>
+
+namespace uhd{ namespace transport{
+
+/***********************************************************************
+ * Claimer class to provide synchronization for multi-thread access.
+ * Claiming enables buffer classes to be used with a buffer queue.
+ **********************************************************************/
+class simple_claimer{
+public:
+    simple_claimer(void){
+        this->release();
+    }
+
+    UHD_INLINE void release(void){
+        boost::mutex::scoped_lock lock(_mutex);
+        _locked = false;
+        lock.unlock();
+        _cond.notify_one();
+    }
+
+    UHD_INLINE bool claim_with_wait(const double timeout){
+        boost::mutex::scoped_lock lock(_mutex);
+        while (_locked){
+            if (not _cond.timed_wait(lock, boost::posix_time::microseconds(long(timeout*1e6)))){
+                break;
+            }
+        }
+        const bool ret = not _locked;
+        _locked = true;
+        return ret;
+    }
+
+private:
+    bool _locked;
+    boost::mutex _mutex;
+    boost::condition_variable _cond;
+};
+
+}} //namespace uhd::transport
+
+#endif /* INCLUDED_LIBUHD_TRANSPORT_SIMPLE_CLAIMER_HPP */