include/errno.h

   1 #ifndef _ERRNO_H
   2
   3 #include <stdlib/errno.h>
   4
   5 #if defined _ERRNO_H && !defined _ISOMAC
   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 errno           /* For #ifndef errno tests.  */
  18 extern int errno attribute_hidden;
  19 #  define __set_errno(val) (errno = (val))
  20
  21 # else
  22
  23 #  include <tls.h>              /* Defines USE_TLS.  */
  24
  25 #  if USE___THREAD
  26 #   undef  errno
  27 #   ifndef NOT_IN_libc
  28 #    define errno __libc_errno
  29 #   else
  30 #    define errno errno         /* For #ifndef errno tests.  */
  31 #   endif
  32 extern __thread int errno attribute_tls_model_ie;
  33 #   define __set_errno(val) (errno = (val))
  34 #  else
  35 #   define __set_errno(val) (*__errno_location ()) = (val)
  36 #  endif
  37
  38 # endif /* RTLD_PRIVATE_ERRNO */
  39
  40 #endif /* _ERRNO_H */
  41
  42 #endif /* ! _ERRNO_H */