Atomically set the value of the specified atomicInt to the specified swapValue, and return its previous value, providing the acquire/release memory ordering guarantee.
Declared in <bsls_atomicoperations_all_all_clangintrinsics.h>
static
Types::Int64
swapInt64AcqRel(
AtomicTypes::Int64* atomicInt,
Types::Int64 swapValue);