/** \brief Malloc and set the data associated with the current process. */
#define gras_userdata_new(type) (gras_userdata_set(xbt_new0(type,1)),gras_userdata_get())
/** \brief Malloc and set the data associated with the current process. */
#define gras_userdata_new(type) (gras_userdata_set(xbt_new0(type,1)),gras_userdata_get())