Guardian Procedure Calls Reference Manual (G06.25+)

Guardian Procedure Calls (L)

Guardian Procedure Calls Reference Manual—522629-013

8-24

LONGJMP_ Procedure

Summary

Syntax for C Programmers

Syntax for TAL Programmers

Parameters

Considerations

Example

Related Programming Manual

Summary

The LONGJMP_ procedure performs a nonlocal goto. It restores the state of the

calling process with context saved in a jump buffer by the SETJMP_ procedure.

Control returns to the location of the corresponding SETJMP_ procedure call.

Syntax for C Programmers

Syntax for TAL Programmers

Parameters

env input

INT .EXT:ref:(JMP_BUF_TEMPLATE)

indicates the address of a jump buffer containing the process context to be

restored.

value input

INT(32)

specifies the value to be returned at the destination of the long jump; that is, at the

location of the corresponding SETJMP_ call. If this value is set to 0D, then 1D is

returned; otherwise

value is returned.

#include <setjmp.h>

jmp_buf env;

void longjmp ( jmp_buf env

,int value );

?SOURCE $SYSTEM.SYSTEM.HSETJMP

LONGJMP_ ( env ! i

,value ); ! i