[driver] added driver source code from isaac repository

lib/driver/event.cpp

@@ -0,0 +1,40 @@
+/* Copyright 2015-2017 Philippe Tillet
+* 
+* Permission is hereby granted, free of charge, to any person obtaining 
+* a copy of this software and associated documentation files 
+* (the "Software"), to deal in the Software without restriction, 
+* including without limitation the rights to use, copy, modify, merge, 
+* publish, distribute, sublicense, and/or sell copies of the Software, 
+* and to permit persons to whom the Software is furnished to do so, 
+* subject to the following conditions:
+* 
+* The above copyright notice and this permission notice shall be 
+* included in all copies or substantial portions of the Software.
+* 
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
+* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
+* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include "driver/event.h"
+
+namespace tdl
+{
+namespace driver
+{
+
+float Event::elapsed_time() const{
+  float time;
+  dispatch::cuEventElapsedTime(&time, cu_->first, cu_->second);
+  return time;
+}
+
+Handle<cu_event_t> const & Event::cu() const
+{ return cu_; }
+
+}
+}