On 30/03/2016 8:22 PM, John McKown wrote:
Simpler, easier to use API. No need to create a file system object and
>ftok a token, you can just use a namespace with mq_open() and features that
>don't exist
>in System V such as mq_notify() spring to mind. In in nutshell it's a
>better design. Having said that the System V message queues are better than
>nothing and you
>don't have to be authorized to use them which is goodness.
An. I see what you're getting at. It wasn't, as I had thought, that
message queues are bad because they are SYSV, but that IBM should have
implemented the POSIX version of message queues instead of the SYSV
version. Too much gaming on my part lately. It rots the brain.
In fact the z/OS implementation is decent. You can use select() and
poll() which you can't on some other Unixes. I suppose
POSIX message queues are quite new and IBM implemented the System V
version because they were part of the standard at that time.
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