[SYCL] Add interface to call host-interop-task

Signed-off-by: Sergey Kanaev <[email protected]>

Author: Sergey Kanaev

sycl/include/CL/sycl/handler.hpp

@@ -16,6 +16,7 @@
 #include <CL/sycl/detail/os_util.hpp>
 #include <CL/sycl/event.hpp>
 #include <CL/sycl/id.hpp>
+#include <CL/sycl/interop_handle.hpp>
 #include <CL/sycl/kernel.hpp>
 #include <CL/sycl/nd_item.hpp>
 #include <CL/sycl/nd_range.hpp>
@@ -825,6 +826,15 @@ class __SYCL_EXPORT handler {
     MCGType = detail::CG::CODEPLAY_HOST_TASK;
   }
 
+
+  template <typename FuncT>
+  typename std::enable_if<
+      detail::check_fn_signature<typename std::remove_reference<FuncT>::type,
+                                 void(interop_handle)>::value>::type
+  codeplay_host_task(FuncT) {
+    throw runtime_error("Not implemented", PI_ERROR_UNKNOWN);
+  }
+
   /// Defines and invokes a SYCL kernel function for the specified range and
   /// offset.
   ///