Guardian Procedure Calls Reference Manual (G06.25+)

Guardian Procedure Calls (C)
Guardian Procedure Calls Reference Manual—522629-013
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CONTROL Procedure
CONTROL Procedure
Summary
Syntax for C Programmers
Syntax for TAL Programmers
Parameters
Condition Code Settings
Control Operations
Considerations
Related Programming Manuals
Summary
CONTROL is used to perform device-dependent I/O operations.
Syntax for C Programmers
•
CEXTDECS (through the included file TNSINTH) defines 32-bit values as the
typedef __int32_t which for TNS and TNS/R compiles is defined as long and for
TNS/E compiles is defined as
int.
•
The function value returned by CONTROL, 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 a number of an open file, identifying the file to which the CONTROL procedure
performs an I/O operation.
#include <cextdecs(CONTROL)>
_cc_status CONTROL ( short filenum
,short operation
,[ short param ]
,[ __int32_t tag ] );
CALL CONTROL ( filenum ! i
,operation ! i
,[ param ] ! i
,[ tag ] ); ! i