[#BloombergLP-bdlcc-SingleConsumerQueueImpl-popFront]
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Remove the element from the front of this queue and load that element into the specified `value`. If the queue is empty, block until it is not empty. Return 0 on success, and a non‐zero value otherwise. Specifically, return `e_DISABLED` if `isPopFrontDisabled()`. On failure, `value` is not changed. Threads blocked due to the queue being empty will return `e_DISABLED` if `disablePopFront` is invoked. The behavior is undefined unless the invoker of this method is the single consumer.

== Synopsis

Declared in `<bdlcc_singleconsumerqueueimpl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
popFront(TYPE* value);
----


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