[#BloombergLP-bslmt-LockGuardUnlock-2constructor-04]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmt.adoc[bslmt]::xref:BloombergLP/bslmt/LockGuardUnlock.adoc[LockGuardUnlock]::LockGuardUnlock
:relfileprefix: ../../../
:mrdocs:

Create a guard that unlocks `lock`.

== Synopsis

Declared in `<bslmt_lockguard.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
LockGuardUnlock(T* lock);
----

== Description

Create a scoped guard that conditionally manages the specified `lock` (if non‐null) and invokes `lock‐>unlock()`. Supplying a null `lock` has no effect. The behavior is undefined unless `lock` (if non‐null) is locked by this thread. Note that `lock` must remain valid throughout the lifetime of this guard, or until `release` is called.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *lock*
| lock object to unlock; may be null
|===


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