code.delx.au - gnu-emacs/blob - src/s/freebsd.h

   1 /* System description header for FreeBSD systems.
   2
   3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
   4                  2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
   5                  Free Software Foundation, Inc.
   6
   7 Author: Shawn M. Carey
   8 (according to authors.el)
   9
  10 This file is part of GNU Emacs.
  11
  12 GNU Emacs is free software: you can redistribute it and/or modify
  13 it under the terms of the GNU General Public License as published by
  14 the Free Software Foundation, either version 3 of the License, or
  15 (at your option) any later version.
  16
  17 GNU Emacs is distributed in the hope that it will be useful,
  18 but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 GNU General Public License for more details.
  21
  22 You should have received a copy of the GNU General Public License
  23 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  24
  25 /* Get most of the stuff from bsd-common */
  26 #include "bsd-common.h"
  27
  28 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_p - (FILE)->_bf._base)
  29
  30 #define HAVE_GETLOADAVG 1
  31
  32 /* This silences a few compilation warnings.  */
  33 #undef BSD_SYSTEM
  34 #if __FreeBSD__ == 1
  35 #define BSD_SYSTEM 199103
  36 #elif __FreeBSD__ == 2
  37 #define BSD_SYSTEM 199306
  38 #elif __FreeBSD__ >= 3
  39 #define BSD_SYSTEM 199506
  40 #endif
  41
  42 /* Don't close pty in process.c to make it as controlling terminal.
  43    It is already a controlling terminal of subprocess, because we did
  44    ioctl TIOCSCTTY.  */
  45 #define DONT_REOPEN_PTY
  46
  47 /* Circumvent a bug in FreeBSD.  In the following sequence of
  48    writes/reads on a PTY, read(2) returns bogus data:
  49
  50    write(2)  1022 bytes
  51    write(2)   954 bytes, get EAGAIN
  52    read(2)   1024 bytes in process_read_output
  53    read(2)     11 bytes in process_read_output
  54
  55    That is, read(2) returns more bytes than have ever been written
  56    successfully.  The 1033 bytes read are the 1022 bytes written
  57    successfully after processing (for example with CRs added if the
  58    terminal is set up that way which it is here).  The same bytes will
  59    be seen again in a later read(2), without the CRs.  */
  60 #define BROKEN_PTY_READ_AFTER_EAGAIN 1
  61
  62 /* Tell that garbage collector that setjmp is known to save all
  63    registers relevant for conservative garbage collection in the jmp_buf.  */
  64 #define GC_SETJMP_WORKS 1
  65
  66 /* Use the GC_MAKE_GCPROS_NOOPS (see lisp.h) method for marking the stack.  */
  67 #define GC_MARK_STACK   GC_MAKE_GCPROS_NOOPS
  68
  69 /* arch-tag: 426529ca-b7c4-448f-b10a-d4dcdc9c78eb
  70    (do not change this comment) */