Guardian Procedure Calls Reference Manual (G06.25+)

Guardian Procedure Calls (C)
Guardian Procedure Calls Reference Manual—522629-013
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CHANGELIST Procedure
CHANGELIST Procedure
Summary
Syntax for C Programmers
Syntax for TAL Programmers
Parameters
Condition Code Settings
Examples
Related Programming Manuals
Summary
The CHANGELIST procedure is used only when the application program acts as a
supervisor or tributary station in a centralized multipoint configuration.
Within a supervisor station, CHANGELIST performs one of the following operations:
•
Specifies continuous or noncontinuous polling
•
Enables or disables polling of a particular station
•
Resumes polling of partially disabled (that is, nonresponding) stations
•
Performs the activation or deactivation of a tributary station by altering the setting
of the poll state bit for a particular entry
Syntax for C Programmers
•
The function value returned by CHANGELIST, which indicates the condition code,
can be interpreted by
_status_lt(), _status_eq(), or _status_gt()
(defined in the file
tal.h).
Note. If polling is in progress when you make the call to CHANGELIST, the specified changes
do not take effect until polling completes either on its own or as the result of a call to
HALTPOLL.
#include <cextdecs(CHANGELIST)>
_cc_status CHANGELIST ( short filenum
,short function
,short parameter );