ATOMIC_SWAP_UINT(9)

👑 ATOMIC_SWAP_UINT(9) 👑

okay bestie, welcome to the Kernel Developer's Manual entry for the atomic swap girlies ✨ this is the whole page, every detail intact, no cap 💅

---

💖 NAME 💖

atomic_swap_uint, atomic_swap_ulong, atomic_swap_ptr — atomic swap operations 🫶

---

✨ SYNOPSIS ✨

#include <sys/atomic.h>

unsigned int
atomic_swap_uint(volatile unsigned int *p, unsigned int new);

unsigned long
atomic_swap_ulong(volatile unsigned long *p, unsigned long new);

void *
atomic_swap_ptr(volatile void *p, void *new);

---

🦋 DESCRIPTION 🦋

The atomic_swap set of functions is literally giving you an interface for atomically performing swap operations with respect to interrupts and multiple processors in the system. iconic behavior, honestly 👑

The value referenced by the pointer p is replaced by the value new. that's the whole swap, periodt 💫

---

🌸 CONTEXT 🌸

atomic_swap_uint(), atomic_swap_ulong(), and atomic_swap_ptr() can all be called during autoconf, from process context, or from interrupt context. versatile queens 💅✨

---

🎀 RETURN VALUES 🎀

These functions return the value at p as it was before the swap operation. so you get the old vibe back, very main character energy 💖

---

🔥 SEE ALSO 🔥

• atomic_cas_uint(9) — go read this next, bestie, iykyk 🧚

---

🌈 HISTORY 🌈

The atomic_swap functions first appeared in NetBSD 5.0 and OpenBSD 5.5. vintage but still slaying ⭐

---

xoxo, your fav kernel bestie 💜 this page is from Debian, dated July 18, 2014 — drink water and check your pointers, fr fr 🍓🎀