QB_RB_SPACE_FREE(3)

💖 qb_rb_space_free — the libqb programmer's manual, but make it cute 💖

okay bestie, gather round, because we're reading a page straight out of the libqb Programmer's Manual, section 3, and it's called qb_rb_space_free. yes it's a function. yes it lives in libqb. no it's not scary. let's go 🦋

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✨ NAME ✨

qb_rb_space_free — literally just tells you the amount of free space in the ring buffer. that's it. that's the whole job. she's a one-trick pony and she ATE. 💅

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🌸 SYNOPSIS 🌸

#include <qb/qbrb.h>

ssize_t qb_rb_space_free(
    qb_ringbuffer_t   *rb   /* ringbuffer instance */
);

so you pull in <qb/qbrb.h>, you hand her a pointer to your ringbuffer, and she gives you back an ssize_t. iconic signature, no notes. ✨

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🎀 PARAMS 🎀

• rb — the ringbuffer instance. that's the whole list. one (1) parameter. she is low maintenance fr fr 🫶

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💀 DESCRIPTION 💀

so here's the thing bestie... the original DESCRIPTION section is empty. there's genuinely nothing written there. it just says DESCRIPTION and then moves on like nothing happened. not me reading a blank section and respecting it anyway 😭

anyway the NAME already told you everything you need: this function returns the amount of free space in the ring buffer. periodt.

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⚠️ NOTE ⚠️

heads up: Some of this space will be consumed by the chunk headers. so like, the number you get back is the free space, but not all of it is yours to play with — the chunk headers take their cut first. budget accordingly, bestie 💸

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👑 SEE ALSO 👑

go read these next, they're all in the same friend group:

• qb_rb_close(3)
• qb_rb_refcount_get(3)
• qb_rb_chmod(3)
• qb_rb_chown(3)
• qb_rb_open(3)
• qb_rb_write_to_file(3)
• qb_rb_create_from_file(3)
• qb_rb_chunks_used(3)
• qb_rb_chunk_reclaim(3)
• qb_rb_space_used(3)
• qb_rb_chunk_write(3)
• qb_rb_shared_user_data_get(3)
• qb_rb_chunk_commit(3)
• qb_rb_chunk_peek(3)
• qb_rb_name_get(3)
• qb_rb_chunk_alloc(3)
• qb_rb_chunk_read(3)

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🌈 COPYRIGHT 🌈

Copyright (C) 2010-2020 Red Hat, Inc.

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and that's the whole page, babe 🧚 this edition came from LIBQB, dated 2025-09-16, and it's filed under QB_RB_SPACE_FREE(3) — slay, go check your free space, ily 💖⭐