why is there no poll/select like mechanism for message queue?

Question

Like we can do, poll/epoll/select on an fd, we can not on msg queue id. I found some non standard methods to make msgqueue-id to fd, but afterall its a non standard. So my q

Answer 1

As Mat points out, POSIX MQs can be used with select/poll in Linux. Beyond that, mq_notify() provides you with the options to receive a signal or spawn a new thread when an empty MQ receives a message. This is another means to avoid blocking or polling.