OSI/AS Programming Manual

APS_CAPDATA_REQ_
APS Procedure Calls
056783 Tandem Computers Incorporated 3–57
APS_CAPDATA_REQ_ This procedure allows you to send a limited amount of user data while you are not
within an activity. You can issue this primitive only if all of the following conditions
are true:
Activity services are available on the connection, but no activity is in progress.
You hold the major/activity token.
You hold the data token and the synchronize-minor token, if these tokens are
available on the connection.
status := APS_CAPDATA_REQ_ ( cepi ! I
,[ user-data ] ! I
,[ tag ] ); ! I
status returned value
INT
indicates the outcome of the call. For the possible values of ZAPS-VAL-STATUS-
xxx, see “Status Codes” in Appendix B.
cepi input
INT:value
is the connection endpoint identifier (CEPI) for this connection.
user-data input
INT .EXT:ref:*
contains the user data you wish to send to the remote application; see
“Considerations” for the maximum amount of data you can send. You must
define the structure of the data buffer, as described in “Defining User Data
Buffers” in Section 2. For a normal-mode presentation or ACSE connection, you
must also encode the data, as described in “Encoding ACSE and Presentation User
Data” in Section 2.
tag input
INT(32):value
is for use in nowait mode only. Specify a unique value to identify this instance of
the procedure call. When the operation is complete, the MFM_AWAITIOX_
procedure returns the tag value, allowing you to match the completion with the
correct instance of the procedure call.