Add grid_launch.cpp for GGL

Change-Id: I87ff9b3f1203d0909f998c96c839f7b321fc3f09

src/grid_launch.cpp

@@ -0,0 +1,38 @@
+#include "hip/hcc_detail/grid_launch_GGL.hpp"
+
+// Internal header, do not percolate upwards.
+#include "hip_hcc_internal.h"
+#include "hc.hpp"
+#include "trace_helper.h"
+
+namespace hip_impl
+{
+    hc::accelerator_view lock_stream_hip_(
+        hipStream_t& stream, void*& locked_stream)
+    {   // This allocated but does not take ownership of locked_stream. If it is
+        // not deleted elsewhere it will leak.
+        using L = decltype(stream->lockopen_preKernelCommand());
+
+        HIP_INIT();
+
+        stream = ihipSyncAndResolveStream(stream);
+        locked_stream = new L{stream->lockopen_preKernelCommand()};
+        return (*static_cast<L*>(locked_stream))->_av;
+    }
+
+    void unlock_stream_hip_(
+        hipStream_t stream,
+        void* locked_stream,
+        const char* kernel_name,
+        hc::accelerator_view* acc_v)
+    {   // Precondition: acc_v is the accelerator_view associated with stream
+        //               which is guarded by locked_stream;
+        //               locked_stream is deletable.
+        using L = decltype(stream->lockopen_preKernelCommand());
+
+        stream->lockclose_postKernelCommand(kernel_name, acc_v);
+
+        delete static_cast<L*>(locked_stream);
+        locked_stream = nullptr;
+    }
+}