NN_REALLOCMSG(3)

✨ NN_REALLOCMSG ✨

okay bestie, pull up a chair 💖 this is the nn_reallocmsg page from the nanomsg manual, section 3, and it's literally the glow-up-your-message function. let's get into it.

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🌸 NAME 🌸

nn_reallocmsg — reallocate a message. that's it, that's the whole vibe. resize szn 💅

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🦋 SYNOPSIS 🦋

#include <nanomsg/nn.h>

void *nn_reallocmsg (void *msg, size_t size);

yes queen, that's the signature. void * in, void * out, size_t size for the new size. no cap. ✨

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💜 DESCRIPTION 💜

so here's the tea 🫖 — this function reallocates a message that was previously allocated by nn_allocmsg(3), or that you received from a peer using the NN_MSG mechanism.

basically: you got a message, and now you want it to be a different size. this is the function for that. main character energy fr fr 👑

⚠️ important bestie — just like the standard realloc, this operation may involve copying the data in the buffer. so like, it's not always an in-place glow-up. the data might get moved. the way that realloc works... yeah. lowkey iconic, highkey worth knowing. 😭

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🎀 RETURN VALUE 🎀

• if the function succeeds, you get a pointer to the newly allocated buffer back. slay 💅
• otherwise, NULL is returned and errno is set to one of the values defined below. not the vibe, but okay. 💀

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🔥 ERRORS 🔥

• ENOMEM — not enough memory to allocate the message. the machine said no. 🍓

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🌈 EXAMPLE 🌈

here's the whole thing in action, bestie:

void *buf = nn_allocmsg (12, 0);
void *newbuf = nn_reallocmsg (buf, 20);
nn_freemsg (newbuf);

allocate 12, realloc to 20, free it. clean, simple, periodt. ✨

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👑 SEE ALSO 👑

go read these next, i'm obsessed with them:

• nn_allocmsg(3)
• nn_freemsg(3)
• nanomsg(7)

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💖 AUTHORS 💖

• Martin Sustrik <sustrik@250bpm.com>

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and that's the whole page, bestie!! 🫶 this was nanomsg version 1.2.2, dated 2026-01-16, and yeah — the manual name was NN_REALLOCMSG(3) the whole time, iykyk. now go reallocate something responsibly. mwah. 💅🧚💜