---
name: "SDL_SetAtomicU32"
section: "3"
platform: "linux"
package: "libsdl3-doc"
version: "3.2.10+ds-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/SDL_SetAtomicU32"
---

# SDL\_SetAtomicU32(3)

Set an atomic variable to a value.

## NAME

SDL\_SetAtomicU32 - Set an atomic variable to a value.

## HEADER FILE

Defined in SDL3/SDL\_atomic.h

## SYNOPSIS

```
#include "SDL3/SDL.h"
```

**Uint32 SDL\_SetAtomicU32(SDL\_AtomicU32 \*a, Uint32 v);**

## DESCRIPTION

This function also acts as a full memory barrier. **Note: If you don't know what this function is for, you shouldn't use** it!

## FUNCTION PARAMETERS

- *a*

  a pointer to an  **SDL\_AtomicU32**\
    variable to be modified.

- *v*

  the desired value.

## RETURN VALUE

( **Uint32** ) Returns the previous value of the atomic variable.

## THREAD SAFETY

It is safe to call this function from any thread.

## AVAILABILITY

This function is available since SDL 3.2.0.

## SEE ALSO

**•**(3), [**SDL\_GetAtomicU32**(3)](/SDL_GetAtomicU32/3.md)