libc-internal.h 3.3 KB

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  1. /* Copyright (C) 1991,92,93,95,96,97,98,99,2000,2001 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, write to the Free
  13. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  14. 02111-1307 USA. */
  15. #ifndef _LIBC_INTERNAL_H
  16. #define _LIBC_INTERNAL_H 1
  17. #include <features.h>
  18. #ifdef __UCLIBC_BUILD_RELRO__
  19. # define attribute_relro __attribute__ ((section (".data.rel.ro")))
  20. #else
  21. # define attribute_relro
  22. #endif
  23. #ifdef __UCLIBC_HAS_THREADS_NATIVE__
  24. # define attribute_tls_model_ie __attribute__ ((tls_model ("initial-exec")))
  25. #endif
  26. /* Pull in things like __attribute_used__ */
  27. #include <sys/cdefs.h>
  28. /* --- this is added to integrate linuxthreads */
  29. /*#define __USE_UNIX98 1*/
  30. #ifndef __ASSEMBLER__
  31. # ifdef IS_IN_libc
  32. # define __need_size_t
  33. # include <stddef.h>
  34. /* sources are built w/ _GNU_SOURCE, this gets undefined */
  35. #ifdef __USE_GNU
  36. extern int __xpg_strerror_r (int __errnum, char *__buf, size_t __buflen);
  37. #else
  38. extern char *__glibc_strerror_r (int __errnum, char *__buf, size_t __buflen);
  39. #endif
  40. /* #include <pthread.h> */
  41. # ifndef __UCLIBC_HAS_THREADS__
  42. # define __pthread_mutex_init(mutex, mutexattr) ((void)0)
  43. # define __pthread_mutex_lock(mutex) ((void)0)
  44. # define __pthread_mutex_trylock(mutex) ((void)0)
  45. # define __pthread_mutex_unlock(mutex) ((void)0)
  46. # define _pthread_cleanup_push_defer(mutex) ((void)0)
  47. # define _pthread_cleanup_pop_restore(mutex) ((void)0)
  48. # endif
  49. /* internal access to program name */
  50. extern const char *__uclibc_progname attribute_hidden;
  51. # endif /* IS_IN_libc */
  52. /* #include <alloca.h> */
  53. #include <bits/stackinfo.h>
  54. #if defined(_STACK_GROWS_DOWN)
  55. # define extend_alloca(buf, len, newlen) \
  56. (__typeof (buf)) ({ size_t __newlen = (newlen); \
  57. char *__newbuf = alloca (__newlen); \
  58. if (__newbuf + __newlen == (char *) buf) \
  59. len += __newlen; \
  60. else \
  61. len = __newlen; \
  62. __newbuf; })
  63. #elif defined(_STACK_GROWS_UP)
  64. # define extend_alloca(buf, len, newlen) \
  65. (__typeof (buf)) ({ size_t __newlen = (newlen); \
  66. char *__newbuf = alloca (__newlen); \
  67. char *__buf = (buf); \
  68. if (__buf + __newlen == __newbuf) \
  69. { \
  70. len += __newlen; \
  71. __newbuf = __buf; \
  72. } \
  73. else \
  74. len = __newlen; \
  75. __newbuf; })
  76. #else
  77. # warning unknown stack
  78. # define extend_alloca(buf, len, newlen) \
  79. alloca (((len) = (newlen)))
  80. #endif
  81. #endif /* __ASSEMBLER__ */
  82. #endif /* _LIBC_INTERNAL_H */