#include <sys/atomic.h>uint32_t
atomic_swap_32(volatile uint32_t *ptr, uint32_t new);
unsigned int
atomic_swap_uint(volatile unsigned int *ptr, unsigned int new);
unsigned long
atomic_swap_ulong(volatile unsigned long *ptr, unsigned long new);
void *
atomic_swap_ptr(volatile void *ptr, void *new);
uint64_t
atomic_swap_64(volatile uint64_t *ptr, uint64_t new);