[#BloombergLP-bslma-TestAllocator-numBytesInUse]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslma.adoc[bslma]::xref:BloombergLP/bslma/TestAllocator.adoc[TestAllocator]::numBytesInUse
:relfileprefix: ../../../
:mrdocs:

Return the number of bytes currently allocated from this object. Note that `numBytesInUse() <= numBytesMax()`.

== Synopsis

Declared in `<bslma_testallocator.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bsls/Types/Int64.adoc[bsls::Types::Int64]
numBytesInUse() const;
----


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