SDL_CPUPauseInstruction(3)

🎀 NAME 🎀

okay bestie, welcome to the SDL3 FUNCTIONS section of the manual — this one's about SDL_CPUPauseInstruction, and it's literally just a macro that slips a CPU-specific "pause" instruction into your program. that's the whole vibe. 💖

---

✨ SYNOPSIS ✨

#include <SDL3/SDL_atomic.h>

#define SDL_CPUPauseInstruction() DoACPUPauseInACompilerAndArchitectureSpecificWay

---

🦋 DESCRIPTION 🦋

So here's the tea: this macro is lowkey iconic in busy-wait loops, because it drops a lil hint to the CPU about what your program is trying to do. and some CPUs are like "oh periodt, bet" and use that hint to do their processing more efficiently. main character CPU behaviour honestly. 👑

but — and this is the important part, no cap — on some platforms this does absolutely nothing. so calling this macro might just be a harmless no-op. it's giving "no thoughts, head empty" on those systems and that's fine, that's allowed, it won't hurt you. 🙈

🫶 also a gentle note, bestie: if you are busy-waiting, there are often more-efficient approaches using other synchronization primitives — mutexes, semaphores, condition variables, etc. just saying. iykyk. 💅

---

🌈 THREAD SAFETY 🌈

This macro is safe to use from any thread. every thread, any thread, all the threads. slay. ✨

---

⭐ AVAILABILITY ⭐

This macro has been available since SDL 3.2.0. so if you're on anything older... bestie, upgrade. 🦋

---

and that's the whole page fr fr — brought to you by Simple Directmedia Layer, landing at version SDL 3.4.18 of the SDL 3 docs. stay pausing, stay efficient, mwah 💋🎀