[#BloombergLP-bslmt-WriteLockGuard-2constructor-02]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmt.adoc[bslmt]::xref:BloombergLP/bslmt/WriteLockGuard.adoc[WriteLockGuard]::WriteLockGuard
:relfileprefix: ../../../
:mrdocs:

Constructors

== Synopses

Declared in `<bslmt_writelockguard.h>`

Create a scoped guard that acquires a write lock on `lock`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
xref:BloombergLP/bslmt/WriteLockGuard/2constructor-0c.adoc[WriteLockGuard](T* lock);
----

[.small]#xref:BloombergLP/bslmt/WriteLockGuard/2constructor-0c.adoc[_» more..._]#

Create a scoped guard that conditionally acquires a write lock on `lock`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BloombergLP/bslmt/WriteLockGuard/2constructor-03.adoc[WriteLockGuard](
    T* lock,
    bool alreadyLockedFlag);
----

[.small]#xref:BloombergLP/bslmt/WriteLockGuard/2constructor-03.adoc[_» more..._]#

== Parameters

[cols="1,4"]
|===
| Name| Description
| *lock*
| lock object to acquire for writing; may be null
| *alreadyLockedFlag*
| `true` if `lock` is already write‐locked
|===


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