LONGJMP
Section: Library functions (3)
Updated: November 25, 1994
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NAME
longjmp - non-local jump to a saved stack context
SYNOPSIS
#include <setjmp.h>
void longjmp(jmp_buf env, int val);
DESCRIPTION
longjmp() and setjmp(3) are useful for dealing with errors
and interrupts encountered in a low-level subroutine of a program.
longjmp() restores the environment saved by the last call of
setjmp() with the corresponding env argument. After
longjmp() is completed, program execution continues as if the
corresponding call of setjmp() had just returned the value
val. longjmp() cannot cause 0 to be returned. If longjmp
is invoked with a second argument of 0, 1 will be returned instead.
RETURN VALUE
This function never returns.
CONFORMING TO
POSIX
NOTES
POSIX does not specify if the signal context will be restored or not.
If you want to save restore signal masks, use
siglongjmp(3)
longjmp() makes programs hard to understand and maintain. If
possible an alternative should be used.
SEE ALSO
setjmp(3), sigsetjmp(2), siglongjmp(2)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
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