Messages in this thread | | | From | "Martijn Sipkema" <> | Subject | POSIX message queues should not allocate memory on send | Date | Fri, 14 May 2004 11:30:53 +0100 |
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There is a problem with the current POSIX message queue implementation. mq_send()/mq_timedsend() may not return ENOMEM and this means memory for mq_maxmsg*mq_msgsize will have to be allocated on queue creation. I think POSIX MSG message passing being part of the REALTIME extensions this makes sense. I've already mentioned this once to the implementors of the current implementation, but they did not agree with my reading of the standard.
The default mq_msgsize also seems a little large to me, but I don't see why defaults are needed; if I understand the standard correctly then creating a new message queue without mq_attr should create an empty queue, which thus cannot be used to pass messages.
--ms
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