MAP_FLUSH_EXPLICIT_BIT_EXT:Int = 0x0010
MAP_INVALIDATE_BUFFER_BIT_EXT:Int = 0x0008
MAP_INVALIDATE_RANGE_BIT_EXT:Int = 0x0004
MAP_READ_BIT_EXT:Int = 0x0001
MAP_UNSYNCHRONIZED_BIT_EXT:Int = 0x0020
MAP_WRITE_BIT_EXT:Int = 0x0002