Remove the front element and load it into value, blocking if empty.
Synopsis
Declared in <bdlcc_singleconsumerqueue.h>
int
popFront(TYPE* value);Description
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.
Return Value
0 on success, and a non‐zero value otherwise
Parameters
Name |
Description |
value |
receives the removed element |
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