comedi_buf_n_bytes_ready(9)

💅 comedi_buf_n_bytes_ready(9) 💅

okay so this is a page from the Kernel API Manual, and it's all about comedi_buf_n_bytes_ready — yes the name is a whole mouthful, we love her anyway 🫶

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✨ NAME ✨

comedi_buf_n_bytes_ready — literally just tells you how much unread data is chilling in the buffer 💖

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🌸 SYNOPSIS 🌸

unsigned int comedi_buf_n_bytes_ready (struct comedi_subdevice *s );

that's it. one function, one argument, no drama (for once) ✨

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🎀 ARGUMENTS 🎀

• s — the COMEDI subdevice. that's the whole vibe check for this one, bestie 💅

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🦋 DESCRIPTION 🦋

okay so here's what she does: comedi_buf_n_bytes_ready determines the number of bytes of unread data sitting in the asynchronous acquisition data buffer for a subdevice 👑 count them. that's the job.

and here's the little caveat you need to know, no cap: the data in question might not have been fully "munged" yet 🙈 like she's raw, she's unprocessed, she's still getting her glam on. so don't assume it's all ready-ready just because the byte count is there 💀

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⭐ RETURN ⭐

returns the amount of unread data — in bytes, obviously, iykyk 🔥

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🌈 SEE ALSO 🌈

like, go read these too, they're all connected fr fr:

• the kernel file ./include/linux/comedi/comedidev.h, plus:
• struct comedi_subdevice(9)
• struct comedi_buf_page(9)
• struct comedi_buf_map(9)
• struct comedi_async(9)
• enum comedi_cb(9)
• struct comedi_driver(9)
• struct comedi_device(9)
• struct comedi_lrange(9)
• comedi_range_is_bipolar(9)
• comedi_range_is_unipolar(9)
• comedi_range_is_external(9)
• comedi_chan_range_is_bipolar(9)
• comedi_chan_range_is_unipolar(9)
• comedi_chan_range_is_external(9)
• comedi_offset_munge(9)
• comedi_bytes_per_sample(9)
• comedi_sample_shift(9)
• comedi_bytes_to_samples(9)
• comedi_samples_to_bytes(9)
• comedi_check_trigger_src(9)
• comedi_check_trigger_is_unique(9)
• comedi_check_trigger_arg_is(9)
• comedi_check_trigger_arg_min(9)
• comedi_check_trigger_arg_max(9)
• __comedi_request_region(9)
• comedi_request_region(9)
• module_comedi_driver(9)

bestie that's a lot of cross-references 💀 but she said read the whole syllabus, so we read the whole syllabus 📚✨

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and that's the whole page, mwah 💋 this cutie lives in ./include/linux/comedi, dated October 2026, and she answers to the name comedi_buf_n_bytes_ready(9) — slay, periodt, go read your kernel headers 🧚💜