/* System description header for FreeBSD systems.

Copyright (C) 1994-2012  Free Software Foundation, Inc.

Author: Shawn M. Carey
(according to authors.el)

This file is part of GNU Emacs.

GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */

/* Get most of the stuff from bsd-common */
#include "bsd-common.h"

#define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_p - (FILE)->_bf._base)

/* This silences a few compilation warnings.  */
#undef BSD_SYSTEM
#if __FreeBSD__ == 1
#define BSD_SYSTEM 199103
#elif __FreeBSD__ == 2
#define BSD_SYSTEM 199306
#elif __FreeBSD__ >= 3
#define BSD_SYSTEM 199506
#endif

/* Don't close pty in process.c to make it as controlling terminal.
   It is already a controlling terminal of subprocess, because we did
   ioctl TIOCSCTTY.  */
#define DONT_REOPEN_PTY

/* Circumvent a bug in FreeBSD.  In the following sequence of
   writes/reads on a PTY, read(2) returns bogus data:

   write(2)  1022 bytes
   write(2)   954 bytes, get EAGAIN
   read(2)   1024 bytes in process_read_output
   read(2)     11 bytes in process_read_output

   That is, read(2) returns more bytes than have ever been written
   successfully.  The 1033 bytes read are the 1022 bytes written
   successfully after processing (for example with CRs added if the
   terminal is set up that way which it is here).  The same bytes will
   be seen again in a later read(2), without the CRs.  */
#define BROKEN_PTY_READ_AFTER_EAGAIN 1

/* Tell that garbage collector that setjmp is known to save all
   registers relevant for conservative garbage collection in the jmp_buf.  */
#define GC_SETJMP_WORKS 1

/* Use the GC_MAKE_GCPROS_NOOPS (see lisp.h) method for marking the stack.  */
#define GC_MARK_STACK 	GC_MAKE_GCPROS_NOOPS