sysdep-cancel.h 1.7 KB

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  1. /* Copyright (C) 2003 Free Software Foundation, Inc.
  2. The GNU C Library is free software; you can redistribute it and/or
  3. modify it under the terms of the GNU Lesser General Public
  4. License as published by the Free Software Foundation; either
  5. version 2.1 of the License, or (at your option) any later version.
  6. The GNU C Library is distributed in the hope that it will be useful,
  7. but WITHOUT ANY WARRANTY; without even the implied warranty of
  8. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  9. Lesser General Public License for more details.
  10. You should have received a copy of the GNU Lesser General Public
  11. License along with the GNU C Library; see the file COPYING.LIB. If
  12. not, see <http://www.gnu.org/licenses/>.  */
  13. #include <sysdep.h>
  14. #include <tls.h>
  15. #ifndef __ASSEMBLER__
  16. # include <pthreadP.h>
  17. #endif
  18. #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
  19. # ifdef IS_IN_libpthread
  20. # define __local_multiple_threads __pthread_multiple_threads
  21. # elif !defined NOT_IN_libc
  22. # define __local_multiple_threads __libc_multiple_threads
  23. # endif
  24. # if defined IS_IN_libpthread || !defined NOT_IN_libc
  25. extern int __local_multiple_threads attribute_hidden;
  26. # define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
  27. # else
  28. # define SINGLE_THREAD_P \
  29. __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
  30. header.multiple_threads) == 0, 1)
  31. # endif
  32. #else
  33. /* This code should never be used but we define it anyhow. */
  34. # define SINGLE_THREAD_P (1)
  35. # define NO_CANCELLATION 1
  36. #endif
  37. # define RTLD_SINGLE_THREAD_P \
  38. __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
  39. header.multiple_threads) == 0, 1)