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(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)


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

Header File

Defined in <SDL3/SDL_atomic.h>


SDL_bool SDL_AtomicCompareAndSwap(SDL_AtomicInt *a, int oldval, int newval);

Function Parameters

SDL_AtomicInt * a a pointer to an SDL_AtomicInt variable to be modified.
int oldval the old value.
int newval the new value.

Return Value

(SDL_bool) Returns SDL_TRUE if the atomic variable was set, SDL_FALSE otherwise.


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.


This function is available since SDL 3.0.0.

See Also

CategoryAPI, CategoryAPIFunction, CategoryAtomic

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