Enqueue functor at the back of this queue.
Enqueue the specified functor at the end of this queue. Return 0 on success, and a non-zero value if enqueuing is disabled. The value of functor becomes unspecified but valid, and its allocator remains unchanged.
0 on success, and a non-zero value if enqueuing is disabled
| Name | Description |
|---|---|
| functor | job to enqueue at the back of this queue |