[#BloombergLP-bsls-AtomicOperations_ALL_ALL_ClangIntrinsics-swapInt64AcqRel]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bsls.adoc[bsls]::xref:BloombergLP/bsls/AtomicOperations_ALL_ALL_ClangIntrinsics.adoc[AtomicOperations_ALL_ALL_ClangIntrinsics]::swapInt64AcqRel
:relfileprefix: ../../../
:mrdocs:

Atomically swap `atomicInt` with acquire/release ordering.

== Synopsis

Declared in `<bsls_atomicoperations_all_all_clangintrinsics.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
xref:BloombergLP/bsls/Types/Int64.adoc[Types::Int64]
swapInt64AcqRel(
    xref:BloombergLP/bsls/Atomic_TypeTraits-0b/Int64.adoc[AtomicTypes::Int64]* atomicInt,
    xref:BloombergLP/bsls/Types/Int64.adoc[Types::Int64] swapValue);
----

== Description

Atomically set the value of the specified `atomicInt` to the specified `swapValue`, and return its previous value, providing the acquire/release memory ordering guarantee.

== Return Value

previous value of `atomicInt`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *atomicInt*
| atomic 64‐bit integer to modify
| *swapValue*
| value to store in `atomicInt`
|===


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