Atomic.pointerXor

Performs an atomic bitwise 'xor' of the value of @atomic and @val, storing the result back in @atomic.

Think of this operation as an atomic version of { tmp = *atomic; *atomic ^= val; return tmp; }.

This call acts as a full compiler and hardware memory barrier.

While @atomic has a volatile qualifier, this is a historical artifact and the pointer passed to it should not be volatile.

struct Atomic
static
size_t
pointerXor
(
void* atomic
,
size_t val
)

Parameters

atomic void*

a pointer to a #gpointer-sized value

val size_t

the value to 'xor'

Return Value

Type: size_t

the value of @atomic before the operation, unsigned

Meta

Since

2.30