[#BloombergLP-bslmt-ReadLockGuardUnlock-2constructor-0a]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmt.adoc[bslmt]::xref:BloombergLP/bslmt/ReadLockGuardUnlock.adoc[ReadLockGuardUnlock]::ReadLockGuardUnlock
:relfileprefix: ../../../
:mrdocs:

Create a scoped guard that conditionally manages the specified `lock` (if non‐null) and invokes `lock‐>unlock()` if the specified `alreadyUnlockedFlag` is `false`. Supplying a null `lock` has no effect. The behavior is undefined unless the state of `lock` (if non‐null) is consistent with `alreadyUnlockedFlag`. Note that `alreadyUnlockedFlag` is used to indicate whether `lock` is in an already‐unlocked state when passed, so if `alreadyUnlockedFlag` is `true` the `unlock` method will _not_ be called on the supplied `lock`. Also note that `lock` must remain valid throughout the lifetime of this guard, or until `release` is called.

== Synopsis

Declared in `<bslmt_readlockguard.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
ReadLockGuardUnlock(
    T* lock,
    bool alreadyUnlockedFlag);
----


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