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.