(This is the legacy documentation for SDL2, the previous stable version; SDL3 is the current stable version.)

SDL_AtomicCAS

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

Header File

Defined in SDL_atomic.h

Syntax

SDL_bool SDL_AtomicCAS(SDL_atomic_t *a, int oldval, int newval);

Function Parameters

SDL_atomic_t *	a	a pointer to an SDL_atomic_t 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.

Remarks

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

Version

This function is available since SDL 2.0.0.

See Also

• SDL_AtomicCASPtr
• SDL_AtomicGet
• SDL_AtomicSet

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CategoryAPI, CategoryAPIFunction, CategoryAtomic

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