newlib/libc/errno/errno.c

   1 /* The errno variable is stored in the reentrancy structure.  This
   2    function returns its address for use by the macro errno defined in
   3    errno.h.  */
   4
   5 #include <errno.h>
   6 #include <reent.h>
   7
   8 #ifdef _REENT_THREAD_LOCAL
   9 _Thread_local int _tls_errno;
  10 #else /* !_REENT_THREAD_LOCAL */
  11
  12 #ifndef _REENT_ONLY
  13
  14 int *
  15 __errno ()
  16 {
  17   return &_REENT_ERRNO(_REENT);
  18 }
  19
  20 #endif
  21
  22 #endif /* _REENT_THREAD_LOCAL */