[#BloombergLP-bdlmt-MultiQueueThreadPool-numElements-0f]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlmt.adoc[bdlmt]::xref:BloombergLP/bdlmt/MultiQueueThreadPool.adoc[MultiQueueThreadPool]::numElements
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`numElements` overloads

== Synopses

Declared in `<bdlmt_multiqueuethreadpool.h>`

Return an instantaneous snapshot of the total number of elements enqueued.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
xref:BloombergLP/bdlmt/MultiQueueThreadPool/numElements-0d.adoc[numElements]() const;
----

[.small]#xref:BloombergLP/bdlmt/MultiQueueThreadPool/numElements-0d.adoc[_» more..._]#

Return the number of elements in the queue with the specified `id`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
xref:BloombergLP/bdlmt/MultiQueueThreadPool/numElements-0e.adoc[numElements](int id) const;
----

[.small]#xref:BloombergLP/bdlmt/MultiQueueThreadPool/numElements-0e.adoc[_» more..._]#

== Return Value

* instantaneous snapshot of the total number of elements enqueued
* number of elements in the queue, or ‐1 if `id` is invalid

== Parameters

[cols="1,4"]
|===
| Name| Description
| *id*
| queue identifier
|===


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