enum DSTORAGE_PRIORITY  : INT8  
{  
    DSTORAGE_PRIORITY_LOW = -1,  
    DSTORAGE_PRIORITY_NORMAL = 0,  
    DSTORAGE_PRIORITY_HIGH = 1,  
    DSTORAGE_PRIORITY_REALTIME = 2,  
    DSTORAGE_PRIORITY_FIRST = DSTORAGE_PRIORITY_LOW,  
    DSTORAGE_PRIORITY_LAST = DSTORAGE_PRIORITY_REALTIME,  
    DSTORAGE_PRIORITY_COUNT = 4  
}