[#BloombergLP-bslmt-MutexImpl-06-NativeType]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmt.adoc[bslmt]::xref:BloombergLP/bslmt/MutexImpl-06.adoc[MutexImpl&lt;Platform::PosixThreads&gt;]::NativeType
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The underlying OS&hyphen;level type&period; Exposed so that other `bslmt` components can operate directly on this mutex&period;

== Synopsis

Declared in `&lt;bslmt&lowbar;muteximpl&lowbar;pthread&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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typedef pthread&lowbar;mutex&lowbar;t NativeType;
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