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
)
ptr
is replaced by
new
and the old value returned.
The 64-bit variants of these functions are available only on platforms
that can support atomic 64-bit memory access.
Applications can check for the availability of 64-bit atomic memory
operations by testing if the pre-processor macro
__HAVE_ATOMIC64_OPS
is defined.