Originální popis anglicky:
setjmp - set jump point for a non-local goto
Návod, kniha: POSIX Programmer's Manual
#include <setjmp.h>
int setjmp(jmp_buf
env);
A call to
setjmp() shall save the calling environment in its
env
argument for later use by
longjmp().
It is unspecified whether
setjmp() is a macro or a function. If a macro
definition is suppressed in order to access an actual function, or a program
defines an external identifier with the name
setjmp, the behavior is
undefined.
An application shall ensure that an invocation of
setjmp() appears in one
of the following contexts only:
- *
- The entire controlling expression of a selection or
iteration statement
- *
- One operand of a relational or equality operator with the
other operand an integral constant expression, with the resulting
expression being the entire controlling expression of a selection or
iteration statement
- *
- The operand of a unary '!' operator with the
resulting expression being the entire controlling expression of a
selection or iteration
- *
- The entire expression of an expression statement (possibly
cast to void)
If the invocation appears in any other context, the behavior is undefined.
If the return is from a direct invocation,
setjmp() shall return 0. If
the return is from a call to
longjmp(),
setjmp() shall return a
non-zero value.
No errors are defined.
The following sections are informative.
None.
In general,
sigsetjmp() is more useful in dealing with errors and
interrupts encountered in a low-level subroutine of a program.
None.
None.
longjmp() ,
sigsetjmp() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<setjmp.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
