snd_rawmidi_transmit_ack (9)

int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream * substream, int count);

substream

the rawmidi substream

count

the transferred count

Advances the hardware pointer for the internal output buffer with the given size and updates the condition. Call after the transmission is finished.

The advanced size if successful, or a negative error code on failure.