개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(1M)을 검색하려면 섹션에서 1M 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

fegetenv(3m)

Mathematical Library Functions                                    fegetenv(3M)



NAME
       fegetenv, fesetenv - get and set current floating-point environment

SYNOPSIS
       c99 [ flag... ] file... -lm [ library... ]
       #include <fenv.h>

       int fegetenv(fenv_t *envp);


       int fesetenv(const fenv_t *envp);

DESCRIPTION
       The  fegetenv()  function  attempts to store the current floating-point
       environment in the object pointed to by envp.


       The fesetenv() function attempts to establish the floating-point  envi‐
       ronment represented by the object pointed to by envp. The envp argument
       points to an object set by a call to fegetenv() or feholdexcept(3M), or
       equals a floating-point environment macro. The fesetenv() function does
       not raise floating-point exceptions, but only installs the state of the
       floating-point status flags represented through its argument.

RETURN VALUES
       If  the  representation  was successfully stored, fegetenv() returns 0.
       Otherwise, it returns a non-zero value.


       If the environment was successfully established, fesetenv() returns  0.
       Otherwise, it returns a non-zero value.

ERRORS
       No errors are defined.

ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i)


       ATTRIBUTE  TYPEATTRIBUTE  VALUE _ Interface StabilityCommitted _ Avail‐
       abilitysystem/library/math  _  MT-LevelMT-Safe  _   StandardSee   stan‐
       dards(7).


SEE ALSO
       fenv.h(3HEAD),  feholdexcept(3M), feupdateenv(3M), attributes(7), stan‐
       dards(7)

NOTES
       In a multithreaded program, the  fegetenv()  and  fegetenv()  functions
       affect the floating point environment only for the calling thread.


       These functions automatically install and deinstall SIGFPE handlers and
       set and clear the trap enable mode bits in the  floating  point  status
       register  as  needed. If a program uses these functions and attempts to
       install a SIGFPE handler or control the trap enable mode bits  indepen‐
       dently, the resulting behavior is not defined.


       As   described   in  fex_set_handling(3M),  when  a  handling  function
       installed in FEX_CUSTOM mode is invoked, all exception traps  are  dis‐
       abled  (and  will  not  be  reenabled  while  SIGFPE is blocked). Thus,
       attempting to change the environment from within a handler  by  calling
       fesetenv or feupdateenv(3M) might not produce the expected results.



Solaris 11.4                     29 Sept 2016                     fegetenv(3M)