[#BloombergLP-bslmt-Semaphore-tryWait]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmt.adoc[bslmt]::xref:BloombergLP/bslmt/Semaphore.adoc[Semaphore]::tryWait
:relfileprefix: ../../../
:mrdocs:

If the count of this semaphore is positive, atomically decrement the count and return 0; otherwise, return a non‐zero value with no effect on the count.

== Synopsis

Declared in `<bslmt_semaphore.h>`

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


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