SDL_AtomicInt(3type)

NAME
SDL_AtomicInt - A type representing an atomic integer value.

SYNOPSIS
#include <SDL3/SDL_atomic.h>

typedef struct SDL_AtomicInt { int value; } SDL_AtomicInt;

DESCRIPTION
This can be used to manage a value that is synchronized across multiple CPUs without a race condition; when an app sets a value with SDL_SetAtomicInt all other threads, regardless of the CPU it is running on, will see that value when retrieved with SDL_GetAtomicInt, regardless of CPU caches, etc.

This is also useful for atomic compare-and-swap operations: a thread can change the value as long as its current value matches expectations. When done in a loop, one can guarantee data consistency across threads without a lock (but the usual warnings apply: if you don't know what you're doing, or you don't do it carefully, you can confidently cause any number of disasters with this, so in most cases, you _should_ use a mutex instead of this!).

This is a struct so people don't accidentally use numeric operations on it directly. You have to use SDL atomic functions.

AVAILABILITY
This struct is available since SDL 3.2.0.

SEE ALSO
SDL_CompareAndSwapAtomicInt(3), SDL_GetAtomicInt(3), SDL_SetAtomicInt(3), SDL_AddAtomicInt(3)