data queues

[bvining@xxxxxxxxxxxx]

The API Retrieve Data Queue Message (QMHRDQM) has been available since
V2R3.  This API provides for retrieving a message without removing the
message and is available on both CISC and RISC.  The API is documented
in the System API Reference.

Bruce Vining

>
>Under the CISC OS, when an entry is received from the queue it was
>automatically
>removed from the queue.  If you need the entry again for another process it
>could
>be added back to the queue but that practice could cause some serious cycle
>stealing looping.  I thought I heard mention that the RISC OS versions has a
>function to retain the entry, don't know for sure.
>
+---
| This is the Midrange System Mailing List!
| To submit a new message, send your mail to "MIDRANGE-L@midrange.com".
| To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com
+---