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FEHOLDEXCEPT(3P) POSIX Programmer's Manual FEHOLDEXCEPT(3P)
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior), or
the interface may not be implemented on Linux.
feholdexcept — save current floating-point environment
#include <fenv.h>
int feholdexcept(fenv_t *envp);
The functionality described on this reference page is aligned with
the ISO C standard. Any conflict between the requirements described
here and the ISO C standard is unintentional. This volume of
POSIX.1‐2008 defers to the ISO C standard.
The feholdexcept() function shall save the current floating-point
environment in the object pointed to by envp, clear the floating-
point status flags, and then install a non-stop (continue on
floating-point exceptions) mode, if available, for all floating-point
exceptions.
The feholdexcept() function shall return zero if and only if non-stop
floating-point exception handling was successfully installed.
No errors are defined.
The following sections are informative.
None.
None.
The feholdexcept() function should be effective on typical
IEC 60559:1989 standard implementations which have the default non-
stop mode and at least one other mode for trap handling or aborting.
If the implementation provides only the non-stop mode, then
installing the non-stop mode is trivial.
None.
fegetenv(3p), feupdateenv(3p)
The Base Definitions volume of POSIX.1‐2008, fenv.h(0p)
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The Open
Group Base Specifications Issue 7, Copyright (C) 2013 by the
Institute of Electrical and Electronics Engineers, Inc and The Open
Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
applied.) 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.unix.org/online.html .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the
source files to man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2013 FEHOLDEXCEPT(3P)
Pages that refer to this page: fenv.h(0p), fegetenv(3p), feupdateenv(3p)