snd_rawmidi_transmit_ack(9)

💅 snd_rawmidi_transmit_ack(9)

okay so this is a page from the Kernel API Manual, and honestly the title lowkey tells you everything: snd_rawmidi_transmit_ack — which literally means acknowledge the transmission. bestie, we are CONFIRMING that the send actually happened. slay. 🎀

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✨ NAME ✨

snd_rawmidi_transmit_ack — acknowledge the transmission 🫶

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✨ SYNOPSIS ✨

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

like, that's the whole vibe. two args, one int back. no cap. 💜

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✨ ARGUMENTS ✨

• substream — the rawmidi substream 🌸 (yes the one you've been working with, girl, that one)
• count — the transferred count ✨ (how much actually made it through, not how much you wanted to send, iykyk)

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✨ DESCRIPTION ✨

okay so here's the tea ☕: this function advances the hardware pointer for the internal output buffer, using the given size, and it updates the condition while it's at it. main character energy fr fr.

and when do you call it? after the transmission is finished. that's it. that's the whole rule. you finish the send, then you come back and ack it. not before. 💀

🚨 vibe check: call this AFTER the transmission is finished — that's the documented moment, and we're not out here doing our own thing. 🙈

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✨ RETURN ✨

• the advanced size if it worked 💖 (yay, slay, iconic)
• a negative error code on failure 😭 (ngl that's the sad path, go check it)

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✨ SEE ALSO ✨

these are all the besties in the same friend group, in the kernel file ./sound/core/rawmidi.c:

• snd_rawmidi_receive(9)
• snd_rawmidi_transmit_empty(9)
• snd_rawmidi_transmit_peek(9)
• snd_rawmidi_transmit(9)
• snd_rawmidi_proceed(9)
• snd_rawmidi_new(9)
• snd_rawmidi_set_ops(9)

go read the whole crew, it's giving lore 🌈

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and that's the page, bestie!! 🦋 this little icon came to you from ./sound/core, dated October 2026 — yes, from the future, we love a forward-thinking queen 👑✨ go forth and ack those transmissions 💅