[#BloombergLP-bslmt-FastPostSemaphoreImpl-takeAll]
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If the count of this semaphore is positive, reduce the count to 0 and return the original value of the count. Otherwise, do nothing and return 0.

== Synopsis

Declared in `<bslmt_fastpostsemaphoreimpl.h>`

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