Comedi Documentation . Prev . Next . comedi_mark_buffer_read -- streaming buffer status . ... int comedi_mark_buffer_read (comedi_t * device, unsigned int subdevice, unsigned int num_bytes); . The function comedi_mark_buffer_read() is used on a subdevice that has a Comedi command in progress. This function can be used to indicate that the next num_bytes bytes in the buffer are no longer needed and may be discarded. ... comedi_get_buffer_contents . ... comedi_get_buffer_offset ...