(This is the documentation for SDL3, which is the current stable version. SDL2 was the previous version!)

SDL_CompareAndSwapAtomicU32

Set an atomic variable to a new value if it is currently an old value.

Header File

Defined in <SDL3/SDL_atomic.h>

Syntax

bool SDL_CompareAndSwapAtomicU32(SDL_AtomicU32 *a, Uint32 oldval, Uint32 newval);

Function Parameters

SDL_AtomicU32 *	a	a pointer to an SDL_AtomicU32 variable to be modified.
Uint32	oldval	the old value.
Uint32	newval	the new value.

Return Value

(bool) Returns true if the atomic variable was set, false otherwise.

Remarks

Note: If you don't know what this function is for, you shouldn't use it!

Thread Safety

It is safe to call this function from any thread.

Version

This function is available since SDL 3.1.3.

See Also

• SDL_GetAtomicU32
• SDL_SetAtomicU32

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CategoryAPI, CategoryAPIFunction, CategoryAtomic

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