[#BloombergLP-bslmt-WriteLockGuard-2constructor-03]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmt.adoc[bslmt]::xref:BloombergLP/bslmt/WriteLockGuard.adoc[WriteLockGuard]::WriteLockGuard
:relfileprefix: ../../../
:mrdocs:

Create a scoped guard that conditionally manages the specified `lock` (if non‐null) and invokes `lock‐>lockWrite()` if the specified `alreadyLockedFlag` is `false`. Supplying a null `lock` has no effect. The behavior is undefined unless the state of `lock` (if non‐null) is consistent with `alreadyLockedFlag`. Note that `alreadyLockedFlag` is used to indicate whether `lock` is in an already‐locked state when passed, so if `alreadyLockedFlag` is `true` the `lock` 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_writelockguard.h>`

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


[.small]#Created with https://www.mrdocs.com[MrDocs]#