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setjmp.h(0p) [posix man page]

<setjmp.h>(P)						     POSIX Programmer's Manual						     <setjmp.h>(P)

NAME
setjmp.h - stack environment declarations SYNOPSIS
#include <setjmp.h> DESCRIPTION
Some of the functionality described on this reference page extends the ISO C standard. Applications shall define the appropriate feature test macro (see the System Interfaces volume of IEEE Std 1003.1-2001, Section 2.2, The Compilation Environment) to enable the visibility of these symbols in this header. The <setjmp.h> header shall define the array types jmp_buf and sigjmp_buf. The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided. void longjmp(jmp_buf, int); void siglongjmp(sigjmp_buf, int); void _longjmp(jmp_buf, int); The following may be declared as a function, or defined as a macro, or both. Function prototypes shall be provided. int setjmp(jmp_buf); int sigsetjmp(sigjmp_buf, int); int _setjmp(jmp_buf); The following sections are informative. APPLICATION USAGE
None. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
The System Interfaces volume of IEEE Std 1003.1-2001, longjmp(), _longjmp(), setjmp(), siglongjmp(), sigsetjmp() COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- 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 . IEEE
/The Open Group 2003 <setjmp.h>(P)

Check Out this Related Man Page

_LONGJMP(3P)						     POSIX Programmer's Manual						      _LONGJMP(3P)

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
_longjmp, _setjmp - non-local goto SYNOPSIS
#include <setjmp.h> void _longjmp(jmp_buf env, int val); int _setjmp(jmp_buf env); DESCRIPTION
The _longjmp() and _setjmp() functions shall be equivalent to longjmp() and setjmp(), respectively, with the additional restriction that _longjmp() and _setjmp() shall not manipulate the signal mask. If _longjmp() is called even though env was never initialized by a call to _setjmp(), or when the last such call was in a function that has since returned, the results are undefined. RETURN VALUE
Refer to longjmp() and setjmp(). ERRORS
No errors are defined. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
If _longjmp() is executed and the environment in which _setjmp() was executed no longer exists, errors can occur. The conditions under which the environment of the _setjmp() no longer exists include exiting the function that contains the _setjmp() call, and exiting an inner block with temporary storage. This condition might not be detectable, in which case the _longjmp() occurs and, if the environment no longer exists, the contents of the temporary storage of an inner block are unpredictable. This condition might also cause unexpected process termination. If the function has returned, the results are undefined. Passing longjmp() a pointer to a buffer not created by setjmp(), passing _longjmp() a pointer to a buffer not created by _setjmp(), passing siglongjmp() a pointer to a buffer not created by sigsetjmp(), or passing any of these three functions a buffer that has been modified by the user can cause all the problems listed above, and more. The _longjmp() and _setjmp() functions are included to support programs written to historical system interfaces. New applications should use siglongjmp() and sigsetjmp() respectively. RATIONALE
None. FUTURE DIRECTIONS
The _longjmp() and _setjmp() functions may be marked LEGACY in a future version. SEE ALSO
longjmp(), setjmp(), siglongjmp(), sigsetjmp(), the Base Definitions volume of IEEE Std 1003.1-2001, <setjmp.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- 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 . IEEE
/The Open Group 2003 _LONGJMP(3P)

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