SNAX/HLS Application Programming Manual

RECEIVE-CONTROL-WAIT Verb
SNAX/HLS Verbs
5–70 104707 Tandem Computers Incorporated
There are a number of restrictions on the use of the RECEIVE–CONTROL–WAIT verb:
Only one RECEIVE–CONTROL–WAIT verb may be outstanding on a SNAX/HLS
session. A RECEIVE–CONTROL–WAIT verb issued while one such verb is
already outstanding on the session, is rejected with a return code of
RC^RCWT^ALREADY^QUEUED.
A RECEIVE–DATA verb issued while a RECEIVE–CONTROL–WAIT verb is
already outstanding on the session, is rejected with a return code of
RC^RCWT^ALREADY^QUEUED.
The verb RECEIVE–CONTROL–WAIT is not legal on a pipelined session. If it is
issued on such a session it is rejected with a return code of RC^INVALID^VERB.
Due to the properties of server connections to SNAX/HLS, it is possible for more
than one Pathway thread under the control of the same TCP, to have the same
SNAX/HLS session allocated. If the application is using this property of server
connections to issue SNAX/HLS verbs from more than one Pathway thread to the
same SNAX/HLS session, the behavior of the RECEIVE–CONTROL–WAIT verb
in this environment is undefined, and its use is not recommended.