[#BloombergLP-bslmt-MeteredMutex-lastResetTime]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmt.adoc[bslmt]::xref:BloombergLP/bslmt/MeteredMutex.adoc[MeteredMutex]::lastResetTime
:relfileprefix: ../../../
:mrdocs:

Return the time in nanoseconds (referenced to an arbitrary but fixed origin) of the most recent invocation to `resetMetrics` (or creation time if `resetMetrics` was never invoked). User can calculate the difference (in nanoseconds) between the current time and the last reset time by expression `bsls::TimeUtil::getTimer() ‐ clientMutex.lastResetTime()`.

== Synopsis

Declared in `<bslmt_meteredmutex.h>`

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