FEHOLDEXCEPT(3P) POSIX Programmer's Manual FEHOLDEXCEPT(3P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
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NAMEfeholdexcept — save current floating-point environment
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 envi‐
ronment in the object pointed to by envp, clear the floating-point sta‐
tus 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.
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.
SEE ALSOfegetenv(), feupdateenv()
The Base Definitions volume of POSIX.1‐2008, <fenv.h>
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 Electri‐
cal 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 .
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IEEE/The Open Group 2013 FEHOLDEXCEPT(3P)