a pointer to an SDL_AtomicInt variable to be modified.
the old value.
the new value.
true if the atomic variable was set, false otherwise.
SDL_GetAtomicInt SDL_SetAtomicInt
Threadsafety: It is safe to call this function from any thread.
Available since SDL 3.2.0.
Set an atomic variable to a new value if it is currently an old value.
***Note: If you don't know what this function is for, you shouldn't use it!***