+typedef struct m_task *m_task_t;
+
+
+/*************** Begin GPU ***************/
+typedef struct simdata_gpu_task *simdata_gpu_task_t;
+
+/** @brief GPU task datatype
+ @ingroup m_datatypes_management_details */
+typedef struct m_gpu_task {
+ char *name; /**< @brief task name if any */
+ simdata_gpu_task_t simdata; /**< @brief simulator data */
+#ifdef HAVE_TRACING
+ long long int counter; /* task unique identifier for instrumentation */
+ char *category; /* task category for instrumentation */
+#endif
+} s_m_gpu_task_t;
+
+/** @brief GPU task datatype
+ @ingroup m_datatypes_management
+
+ A <em>task</em> may then be defined by a <em>computing
+ amount</em>, a <em>dispatch latency</em> and a <em>collect latency</em>.
+ \see m_task_management
+ @{ */
+typedef struct m_gpu_task *m_gpu_task_t;
+/*************** End GPU ***************/
+
+/**
+ * \brief @brief Communication action
+ * \ingroup m_datatypes_management
+ *
+ * Communication actions transfer tasks between processes.
+ * For a given task, the sender and the receiver have distinct objects.
+ */
+typedef struct msg_comm *msg_comm_t;