Manual browser: atomic_swap(3)
|ATOMIC_SWAP(3)||Library Functions Manual||ATOMIC_SWAP(3)|
NAMEatomic_swap, atomic_swap_32, atomic_swap_uint, atomic_swap_ulong, atomic_swap_ptr, atomic_swap_64 — atomic swap operations
atomic_swap_32(volatile uint32_t *ptr, uint32_t new);
atomic_swap_uint(volatile unsigned int *ptr, unsigned int new);
atomic_swap_ulong(volatile unsigned long *ptr, unsigned long new);
atomic_swap_ptr(volatile void *ptr, void *new);
atomic_swap_64(volatile uint64_t *ptr, uint64_t new);
DESCRIPTIONThe atomic_swap family of functions perform a swap operation in an atomic fashion. The value of the variable referenced by 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.
HISTORYThe atomic_swap functions first appeared in NetBSD 5.0.
|April 11, 2007||NetBSD 7.0|