[#UniqueLock-2conversion]
= xref:UniqueLock.adoc[UniqueLock]::operator bool
:relfileprefix: ../
:mrdocs:

Report whether this lock currently owns its mutex.

== Synopsis

Declared in `<sync.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
operator bool();
----

== Return Value

true if the mutex is held.


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