atomicPointerAnd

fnsize_t atomicPointerAnd(void * atomic, size_t val)

Performs an atomic bitwise 'and' 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.

In GLib 2.80, the return type was changed from #gsize to #guintptr to add support for platforms with 128-bit pointers. This should not affect existing code.

Parameters

atomica pointer to a #gpointer-sized value
valthe value to 'and'

Returns

the value of atomic before the operation, unsigned