XBT_PRIVATE void TRACE_msg_task_get_start();
XBT_PRIVATE int TRACE_msg_task_put_start(msg_task_t task); // returns TRUE if the task_put_end must be called
XBT_PRIVATE void TRACE_msg_task_put_end();
XBT_PRIVATE void TRACE_msg_task_get_start();
XBT_PRIVATE int TRACE_msg_task_put_start(msg_task_t task); // returns TRUE if the task_put_end must be called
XBT_PRIVATE void TRACE_msg_task_put_end();