PR 56981 Improve unbuffered performance on special files.
2013-04-29 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/56981
* io/transfer.c (next_record_w_unf): First fix head marker, then
write tail.
(next_record): Call flush_if_unbuffered.
* io/unix.c (struct unix_stream): Add field unbuffered.
(flush_if_unbuffered): New function.
(fd_to_stream): New argument.
(open_external): Fix fd_to_stream call.
(input_stream): Likewise.
(output_stream): Likewise.
(error_stream): Likewise.
* io/unix.h (flush_if_unbuffered): New prototype.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@198390
138bc75d-0d04-0410-961f-
82ee72b054a4