[#BloombergLP-bdlcc-SingleProducerSingleConsumerBoundedQueue-waitUntilEmpty]
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Block until all the elements in this queue are removed. Return 0 on success, and a non‐zero value otherwise. Specifically, return `e_SUCCESS` on success, `e_DISABLED` if `isPopFrontDisabled()` and `e_FAILED` if an underlying mechanism returns an error. A blocked thread waiting for the queue to empty will return a non‐zero value if `disablePopFront` is invoked.

== Synopsis

Declared in `<bdlcc_singleproducersingleconsumerboundedqueue.h>`

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


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