memset64(9)

🌸 MEMSET64(9) — the kernel API manual, but make it cute 🌸

okay so bestie, welcome to the memset64(9) page from the Kernel API Manual 💖 strap in, it's short but it's iconic.

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✨ NAME ✨

memset64 — fill a memory area with a uint64_t 🫶

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🌈 SYNOPSIS 🌈

void * memset64 (uint64_t *s , uint64_t v , size_t count );

that's it. that's the whole vibe. 💅

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🎀 ARGUMENTS 🎀

• s — pointer to the start of the area. like, where the party begins ✨
• v — the value you're filling the area with. the whole personality of the bytes, basically 👑
• count — the number of values to store. and bestie, read the next section before you get cute with this one 🙈

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💜 DESCRIPTION 💜

so here's the tea: this differs from memset in that it fills with a uint64_t instead of a byte. big chunky values, no cap. 🔥

⚠️ remember that count is the number of uint64_ts to store, not the number of bytes. not me warning you twice but like... do not mess this up fr fr 😭

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🦋 SEE ALSO 🦋

kernel file ./lib/string.c — and honestly the whole friend group showed up:

strncasecmp(9), stpcpy(9), strcmp(9), strncmp(9), strchr(9), strchrnul(9), strnchrnul(9), strrchr(9), strnchr(9), strspn(9), strcspn(9), strpbrk(9), strsep(9), memset(9), memset16(9), memset32(9), memcpy(9), memmove(9), memcmp(9), bcmp(9), memscan(9), strstr(9), strnstr(9), memchr(9), memchr_inv(9)

like a full group chat, honestly. iykyk 💅

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and that's the page, bestie 🧚 this little gem lives in ./lib and it's dated October 2026 — so go forth, fill those uint64_ts, and remember: count is not bytes. mwah 💖🎀🌸