SDL_MEMORYBARRIERACQUIREFUNCTION(3)

✨ SDL_MemoryBarrierAcquireFunction(3) ✨

okay bestie, welcome to the SDL3 FUNCTIONS section of the manual, and today's main character is SDL_MemoryBarrierAcquireFunction. she's a memory acquire barrier. but like… the function version of one. yes there's a difference, stay with me 💖

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🎀 NAME 🎀

SDL_MemoryBarrierAcquireFunction — inserts a memory acquire barrier, the function version. that's it, that's the job, and she does it flawlessly 💅

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🌸 SYNOPSIS 🌸

#include <SDL3/SDL_atomic.h>

void SDL_MemoryBarrierAcquireFunction(void);

no args, no return value, no drama. she takes nothing and gives you a barrier. queen behavior 👑

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🦋 DESCRIPTION 🦋

okay so first thing: go read SDL_MemoryBarrierRelease for the actual deets on what's going on here, because this page is lowkey just the vibe-check version. fr fr, that's where the details live. 📖

what this one is, specifically, is the function version of that whole situation. and why would you ever want the function version instead of the macro, you ask? valid question, bestie. it might be useful if you need to use this functionality from a scripting language, etc. 😌 (iykyk — scripting languages can't always reach into macros the way C can.)

also, plot twist: some of the macro versions actually call this function behind the scenes, because more heavy lifting can happen inside of SDL that way. so she's not just a stand-in, she's doing real work for the macros too. iconic. ✨

but — and this is the important part, so listen up — generally, an app written in C/C++/etc should use the macro version, because it will be more efficient. the function version is the special-case girly, not the everyday one. don't make her do overtime when the macro could handle it 💀

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💜 THREAD SAFETY 💜

obviously this function is safe to use from any thread at any time. like, no notes. 🫶

but if you find yourself needing this, you are probably dealing with some very sensitive code. be careful! 🚨 this is the part where the cute font gets a little less cute because memory barriers are genuinely the deep end of the pool, bestie. respect her or she'll disrespect your program 💀

not me warning you about undefined chaos in a manpage. anyway. be careful. fr.

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🌈 AVAILABILITY 🌈

this function is available since SDL 3.2.0. so if you're on something older, she simply is not there. sorry babe, update or perish 🧚

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⭐ SEE ALSO ⭐

• SDL_MemoryBarrierAcquire(3) — the sibling, go say hi 💖

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and that's the whole page, bestie!! brought to you by Simple Directmedia Layer, version SDL 3.4.18 — go forth, insert your barriers responsibly, and remember: macro when you can, function when you must 💅✨🎀🦋