compare_and_exchange_pointer

Description:

public static bool compare_and_exchange_pointer<G> (unowned G** aptr, G old_ptr, owned G _new_ptr, size_t mask = 0, size_t old_mask = 0, size_t new_mask = 0)

Compares and exchanges objects.

Parameters:

aptr	Atomic pointer.
old_ptr	Old pointer.
_new_ptr	New value.
old_mask	Old mask.
new_mask	New mask.

Returns:

Value that was previously stored.