Add _REENT_ERRNO(ptr)

Add a _REENT_ERRNO() macro to encapsulate the access to the
_errno member of struct reent. This will help to replace the
structure member with a thread-local storage object in a follow
up patch.

Replace uses of __errno_r() with _REENT_ERRNO().  Keep __errno_r() macro for
potential users outside of Newlib.

1 files changed, 3 insertions, 3 deletions

diff --git a/newlib/libc/stdio/tmpfile.c b/newlib/libc/stdio/tmpfile.c
index f209a3e..5fe6e3b 100644
--- a/newlib/libc/stdio/tmpfile.c
+++ b/newlib/libc/stdio/tmpfile.c
@@ -65,15 +65,15 @@ _tmpfile_r (struct _reent *ptr)
       fd = _open_r (ptr, f, O_RDWR | O_CREAT | O_EXCL | O_BINARY,
 		    S_IRUSR | S_IWUSR);
     }
-  while (fd < 0 && ptr->_errno == EEXIST);
+  while (fd < 0 && _REENT_ERRNO(ptr) == EEXIST);
   if (fd < 0)
     return NULL;
   fp = _fdopen_r (ptr, fd, "wb+");
-  e = ptr->_errno;
+  e = _REENT_ERRNO(ptr);
   if (!fp)
     _close_r (ptr, fd);
   (void) _remove_r (ptr, f);
-  ptr->_errno = e;
+  _REENT_ERRNO(ptr) = e;
   return fp;
 }