SETJMP
Section: Library functions (3)
Updated: November 25, 1994
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NAME
setjmp - save stack context for non-local goto
SYNOPSIS
#include <setjmp.h>
int setjmp(jmp_buf env );
DESCRIPTION
setjmp and longjmp(3) are useful for dealing with errors
and interrupts encountered in a low-level subroutine of a program.
setjmp() saves the stack context/environment in env for
later use by longjmp(). The stack context will be invalidated
if the function which called setjmp() returns.
RETURN VALUE
It returns the value 0 if returning directly and non-zero
when returning from longjmp() using the saved context.
CONFORMING TO
POSIX
NOTES
POSIX does not specify if the signal context will be saved or not.
If you want to save signal masks, use
sigsetjmp(3).
setjmp() makes programs hard to understand and maintain. If
possible an alternative should be used.
SEE ALSO
longjmp(3), sigsetjmp(2), siglongjmp(2)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
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