errno.h 2.2 KB

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  1. /* Error constants. Linux specific version.
  2. Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #ifdef _ERRNO_H
  17. # undef EDOM
  18. # undef EILSEQ
  19. # undef ERANGE
  20. # include <linux/errno.h>
  21. /* Linux has no ENOTSUP error code. */
  22. # define ENOTSUP EOPNOTSUPP
  23. /* Linux also has no ECANCELED error code. Since it is not used here
  24. we define it to an invalid value. */
  25. # define ECANCELED 125
  26. # ifndef __ASSEMBLER__
  27. /* We now need a declaration of the `errno' variable. */
  28. extern int errno;
  29. /* Function to get address of global `errno' variable. */
  30. extern int *__errno_location (void) __THROW __attribute__ ((__const__));
  31. # if defined _LIBC
  32. /* We wouldn't need a special macro anymore but it is history. */
  33. # define __set_errno(val) (*__errno_location ()) = (val)
  34. # endif /* _LIBC */
  35. # if !defined _LIBC || defined _LIBC_REENTRANT
  36. /* When using threads, errno is a per-thread value. */
  37. # define errno (*__errno_location ())
  38. # endif
  39. # endif /* !__ASSEMBLER__ */
  40. #endif /* _ERRNO_H */
  41. #if !defined _ERRNO_H && defined __need_Emath
  42. /* This is ugly but the kernel header is not clean enough. We must
  43. define only the values EDOM, EILSEQ and ERANGE in case __need_Emath is
  44. defined. */
  45. # define EDOM 33 /* Math argument out of domain of function. */
  46. # define EILSEQ 84 /* Illegal byte sequence. */
  47. # define ERANGE 34 /* Math result not representable. */
  48. #endif /* !_ERRNO_H && __need_Emath */