Make ITS vertex messageable

Author: shahor02

DataFormats/Detectors/ITSMFT/ITS/include/DataFormatsITS/Vertex.h

@@ -12,6 +12,10 @@
 #ifndef O2_TRACKINGITS_VERTEX_H_
 #define O2_TRACKINGITS_VERTEX_H_
 
+#include "GPUCommonDef.h"
+#ifndef GPUCA_GPUCODE_DEVICE
+#include <type_traits>
+#endif
 #include "ReconstructionDataFormats/Vertex.h"
 #include "SimulationDataFormat/MCCompLabel.h"
 #include "DataFormatsITS/TimeEstBC.h"
@@ -22,4 +26,16 @@ using Vertex = o2::dataformats::Vertex<o2::its::TimeEstBC>;
 using VertexLabel = std::pair<o2::MCCompLabel, float>;
 } // namespace o2::its
 
-#endif
+#ifndef GPUCA_GPUCODE_DEVICE
+/// Defining ITS Vertex explicitly as messageable
+namespace o2::framework
+{
+template <typename T>
+struct is_messageable;
+template <>
+struct is_messageable<o2::dataformats::Vertex<o2::its::TimeEstBC>> : std::true_type {
+};
+} // namespace o2::framework
+#endif
+
+#endif