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diff --git a/man3p/_setjmp.3p b/man3p/_setjmp.3p new file mode 100644 index 000000000..8ddc0c897 --- /dev/null +++ b/man3p/_setjmp.3p @@ -0,0 +1,84 @@ +.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved +.TH "_LONGJMP" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual" +.\" _longjmp +.SH NAME +_longjmp, _setjmp \- non-local goto +.SH SYNOPSIS +.LP +\fB#include <setjmp.h> +.br +.sp +void _longjmp(jmp_buf\fP \fIenv\fP\fB, int\fP \fIval\fP\fB); +.br +int _setjmp(jmp_buf\fP \fIenv\fP\fB); \fP +\fB +.br +\fP +.SH DESCRIPTION +.LP +The \fI_longjmp\fP() and \fI_setjmp\fP() functions shall be equivalent +to \fIlongjmp\fP() and \fIsetjmp\fP(), respectively, with the +additional restriction that \fI_longjmp\fP() and \fI_setjmp\fP() shall +not manipulate the signal mask. +.LP +If \fI_longjmp\fP() is called even though \fIenv\fP was never initialized +by a call to \fI_setjmp\fP(), or when the last such +call was in a function that has since returned, the results are undefined. +.SH RETURN VALUE +.LP +Refer to \fIlongjmp\fP() and \fIsetjmp\fP() . +.SH ERRORS +.LP +No errors are defined. +.LP +\fIThe following sections are informative.\fP +.SH EXAMPLES +.LP +None. +.SH APPLICATION USAGE +.LP +If \fI_longjmp\fP() is executed and the environment in which \fI_setjmp\fP() +was executed no longer exists, errors can occur. +The conditions under which the environment of the \fI_setjmp\fP() +no longer exists include exiting the function that contains the +\fI_setjmp\fP() call, and exiting an inner block with temporary storage. +This condition might not be detectable, in which case the +\fI_longjmp\fP() 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. +.LP +Passing \fIlongjmp\fP() a pointer to a buffer not created by \fIsetjmp\fP(), +passing \fI_longjmp\fP() a pointer to a buffer not created by \fI_setjmp\fP(), +passing \fIsiglongjmp\fP() a pointer to a buffer not created by \fIsigsetjmp\fP(), +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. +.LP +The \fI_longjmp\fP() and \fI_setjmp\fP() functions are included to +support programs written to historical system interfaces. +New applications should use \fIsiglongjmp\fP() and \fIsigsetjmp\fP() +respectively. +.SH RATIONALE +.LP +None. +.SH FUTURE DIRECTIONS +.LP +The \fI_longjmp\fP() and \fI_setjmp\fP() functions may be marked LEGACY +in a future version. +.SH SEE ALSO +.LP +\fIlongjmp\fP() , \fIsetjmp\fP() , \fIsiglongjmp\fP() , \fIsigsetjmp\fP() +, the Base Definitions volume of +IEEE\ Std\ 1003.1-2001, \fI<setjmp.h>\fP +.SH COPYRIGHT +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 . |