Attempt to remove the element from the front of this queue without blocking, and, if successful, load the specified value with the removed element. Return 0 on success, and a non‐zero value if queue was empty. On failure, value is not changed.
Attempt to remove the element from the front of this queue without blocking, and, if successful, load the specified value with the removed element. Return 0 on success, and a non‐zero value if queue was empty. On failure, value is not changed.