[#BloombergLP-bslmt-Barrier-numArrivals]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmt.adoc[bslmt]::xref:BloombergLP/bslmt/Barrier.adoc[Barrier]::numArrivals
:relfileprefix: ../../../
:mrdocs:

Return the required number of arrivals before all waiting threads will unblock&period;

== Synopsis

Declared in `&lt;bslmt&lowbar;barrier&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
numArrivals() const;
----

== Return Value

required number of arrivals before waiting threads unblock


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