[driver] added driver source code from isaac repository

lib/driver/stream.cpp

@@ -0,0 +1,95 @@
+/* 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 <iostream>
+#include <cassert>
+#include <array>
+
+#include "driver/backend.h"
+#include "driver/stream.h"
+#include "driver/context.h"
+#include "driver/device.h"
+#include "driver/event.h"
+#include "driver/kernel.h"
+#include "driver/buffer.h"
+
+namespace tdl
+{
+
+namespace driver
+{
+
+inline CUcontext cucontext(){
+  CUcontext result;
+  dispatch::cuCtxGetCurrent(&result);
+  return result;
+}
+
+Stream::Stream(CUstream stream, bool take_ownership): context_(cucontext(), take_ownership), cu_(stream, take_ownership)
+{}
+
+Stream::Stream(Context const & context): context_(context), cu_(CUstream(), true)
+{
+  ContextSwitcher ctx_switch(context_);
+  dispatch::cuStreamCreate(&*cu_, 0);
+}
+
+void Stream::synchronize()
+{
+  ContextSwitcher ctx_switch(context_);
+  dispatch::cuStreamSynchronize(*cu_);
+}
+
+Context const & Stream::context() const
+{ return context_; }
+
+void Stream::enqueue(Kernel const & kernel, std::array<size_t, 3> grid, std::array<size_t, 3> block, std::vector<Event> const *, Event* event){
+  ContextSwitcher ctx_switch(context_);
+  if(event)
+    dispatch::cuEventRecord(((cu_event_t)*event).first, *cu_);
+  dispatch::cuLaunchKernel(kernel, grid[0], grid[1], grid[2], block[0], block[1], block[2], 0, *cu_,(void**)kernel.cu_params(), NULL);
+  if(event)
+    dispatch::cuEventRecord(((cu_event_t)*event).second, *cu_);
+}
+
+void Stream::write(Buffer const & buffer, bool blocking, std::size_t offset, std::size_t size, void const* ptr){
+  ContextSwitcher ctx_switch(context_);
+  if(blocking)
+    dispatch::cuMemcpyHtoD(buffer + offset, ptr, size);
+  else
+    dispatch::cuMemcpyHtoDAsync(buffer + offset, ptr, size, *cu_);
+}
+
+void Stream::read(Buffer const & buffer, bool blocking, std::size_t offset, std::size_t size, void* ptr){
+  ContextSwitcher ctx_switch(context_);
+  if(blocking)
+    dispatch::cuMemcpyDtoH(ptr, buffer + offset, size);
+  else
+    dispatch::cuMemcpyDtoHAsync(ptr, buffer + offset, size, *cu_);
+}
+
+Handle<CUstream> const & Stream::cu() const
+{ return cu_; }
+
+}
+
+}