setjmp.h(3head) [centos man page]

setjmp.h(3HEAD)                                                       Headers                                                      setjmp.h(3HEAD)

NAME

       setjmp.h, setjmp - stack environment declarations

SYNOPSIS

       #include <setjmp.h>

DESCRIPTION

       The <setjmp.h> header defines the array types jmp_buf and sigjmp_buf. Applications must define the appropriate feature test macro to enable
       the visibility of the symbols in this header.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Interface Stability          |Standard                     |
       +-----------------------------+-----------------------------+

SEE ALSO

       _longjmp(3C), setjmp(3C), attributes(5), standards(5)

SunOS 5.10                                                          10 Sep 2004                                                    setjmp.h(3HEAD)

SETJMP(3)							 Library functions							 SETJMP(3)

NAME

       setjmp, sigsetjmp - save stack context for non-local goto

SYNOPSIS

       #include <setjmp.h>

       int setjmp(jmp_buf env);
       int sigsetjmp(sigjmp_buf env, int savesigs);

DESCRIPTION

       setjmp()  and  longjmp()  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.

       sigsetjmp()  is	similar  to  setjmp().	 If savesigs is nonzero, the set of blocked signals is saved in env and will be restored if a sig-
       longjmp() is later performed with this env.

RETURN VALUE

       setjmp() and sigsetjmp() return 0 if returning directly, and non-zero when returning from longjmp() using the saved context.

CONFORMING TO

       POSIX, ISO 9899 (C99)

NOTES

       POSIX does not specify whether setjmp will save the signal context. (In SYSV it will not. In BSD4.3  it	will,  and  there  is  a  function
       _setjmp that will not.)	If you want to save signal masks, use sigsetjmp.

       setjmp() and sigsetjmp make programs hard to understand and maintain.  If possible an alternative should be used.

SEE ALSO

       longjmp(3), siglongjmp(3)

								    1997-03-02								 SETJMP(3)