errno-loc.c 1.4 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445
  1. /* MT support function to get address of `errno' variable, linuxthreads
  2. version.
  3. Copyright (C) 1996, 1998, 2002, 2003, 2004 Free Software Foundation, Inc.
  4. This file is part of the GNU C Library.
  5. The GNU C Library is free software; you can redistribute it and/or
  6. modify it under the terms of the GNU Lesser General Public
  7. License as published by the Free Software Foundation; either
  8. version 2.1 of the License, or (at your option) any later version.
  9. The GNU C Library is distributed in the hope that it will be useful,
  10. but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12. Lesser General Public License for more details.
  13. You should have received a copy of the GNU Lesser General Public
  14. License along with the GNU C Library; if not, write to the Free
  15. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  16. 02111-1307 USA. */
  17. #include <errno.h>
  18. #include <linuxthreads/internals.h>
  19. #include <sysdep-cancel.h>
  20. #if ! USE___THREAD && !RTLD_PRIVATE_ERRNO
  21. #undef errno
  22. extern int errno;
  23. #endif
  24. int *
  25. #if ! USE___THREAD
  26. weak_const_function
  27. #endif
  28. __errno_location (void)
  29. {
  30. #if ! USE___THREAD && !defined NOT_IN_libc
  31. if (! SINGLE_THREAD_P)
  32. {
  33. pthread_descr self = thread_self();
  34. return LIBC_THREAD_GETMEM (self, p_errnop);
  35. }
  36. #endif
  37. return &errno;
  38. }
  39. libc_hidden_def (__errno_location)