include/errno.h

   1 #ifndef _ERRNO_H
   2
   3 #include <stdlib/errno.h>
   4
   5 #if defined _ERRNO_H && !defined _ISOMAC && !defined __cplusplus
   6
   7 # ifdef IS_IN_rtld
   8 #  include <dl-sysdep.h>
   9 # endif
  10
  11 # if RTLD_PRIVATE_ERRNO
  12 /* The dynamic linker uses its own private errno variable.
  13    All access to errno inside the dynamic linker is serialized,
  14    so a single (hidden) global variable is all it needs.  */
  15
  16 #  undef  errno
  17 #  define errno rtld_errno
  18 extern int rtld_errno attribute_hidden;
  19
  20 # else
  21
  22 #  include <tls.h>              /* Defines USE_TLS.  */
  23
  24 #  if USE___THREAD
  25 #   undef  errno
  26 #   ifndef NOT_IN_libc
  27 #    define errno __libc_errno
  28 #   else
  29 #    define errno errno         /* For #ifndef errno tests.  */
  30 #   endif
  31 extern __thread int errno attribute_tls_model_ie;
  32 #  endif
  33
  34 # endif /* RTLD_PRIVATE_ERRNO */
  35
  36 # define __set_errno(val) (errno = (val))
  37
  38 # ifndef __ASSEMBLER__
  39 extern int *__errno_location (void) __THROW __attribute__ ((__const__))
  40 #  if RTLD_PRIVATE_ERRNO
  41      attribute_hidden
  42 #  endif
  43 ;
  44 libc_hidden_proto (__errno_location)
  45 # endif
  46
  47 #endif /* _ERRNO_H */
  48
  49 #endif /* ! _ERRNO_H */