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86d2b0b5bf
1998-02-17 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/bits/errno.h (__set_errno): Don't assign to global errno variable anymore.
53 lines
2.0 KiB
C
53 lines
2.0 KiB
C
/* Error constants. Linux specific version.
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Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifdef _ERRNO_H
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# undef EDOM
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# undef ERANGE
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# include <linux/errno.h>
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# ifndef __ASSEMBLER__
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/* We now need a declaration of the `errno' variable. */
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extern int errno;
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/* Function to get address of global `errno' variable. */
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extern int *__errno_location __P ((void)) __attribute__ ((__const__));
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# if defined _LIBC
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/* We wouldn't need a special macro anymore but it is history. */
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# define __set_errno(val) (*__errno_location ()) = (val)
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# endif /* _LIBC */
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# if !defined _LIBC || defined _LIBC_REENTRANT
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/* When using threads, errno is a per-thread value. */
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# define errno (*__errno_location ())
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# endif
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# endif /* !__ASSEMBLER__ */
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#endif /* _ERRNO_H */
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#if !defined _ERRNO_H && defined __need_Emath
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/* This is ugly but the kernel header is not clean enough. We must
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define only the values EDOM and ERANGE in case __need_Emath is
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defined. The value is the same for all Linux ports. */
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# define EDOM 33 /* Math argument out of domain of function. */
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# define EILSEQ 84 /* Illegal byte sequence. */
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# define ERANGE 34 /* Math result not representable. */
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#endif /* !_ERRNO_H && __need_Emath */
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