Guardian Procedure Calls Reference Manual (G06.25+)

Guardian Procedure Calls (H-K)

Guardian Procedure Calls Reference Manual—522629-013

7-2

HALTPOLL Procedure

Summary

Syntax for C Programmers

Syntax for TAL Programmers

Parameters

Condition Code Settings

Example

Related Programming Manuals

Summary

The HALTPOLL procedure is normally used to stop continuous polling.

Syntax for C Programmers

•

The function value returned by HALTPOLL, which indicates the condition code, can

be interpreted by

_status_lt(), _status_eq(), or _status_gt() (defined

in the file

tal.h).

Syntax for TAL Programmers

Parameters

filenum input

INT:value

is the number of an open file that HALTPOLL stops polling.

Condition Code Settings

< (CCL) indicates that an error occurred (call FILE_GETINFO_ or FILEINFO).

= (CCE) indicates that the HALTPOLL procedure executed successfully.

> (CCG) indicates that an error occurred (call FILE_GETINFO_ or FILEINFO).

Example

CALL HALTPOLL ( FNUM );

#include <cextdecs(HALTPOLL)>

_cc_status HALTPOLL ( short filenum );

CALL HALTPOLL ( filenum ); ! i