src/mem-limits.h

   1 /* Includes for memory limit warnings.
   2    Copyright (C) 1990, 1993, 1994, 1995, 1996, 2001, 2002, 2003, 2004,
   3                  2005, 2006, 2007, 2008, 2009, 2010, 2011  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software: you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation, either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifdef MSDOS
  21 #include <dpmi.h>
  22 extern int etext;
  23 #endif
  24
  25 /* Some systems need this before <sys/resource.h>.  */
  26 #include <sys/types.h>
  27
  28 #ifdef _LIBC
  29
  30 #include <sys/resource.h>
  31 #define BSD4_2                  /* Tell code below to use getrlimit.  */
  32
  33 /* Old Linux startup code won't define __data_start.  */
  34 extern int etext, __data_start; weak_extern (__data_start)
  35 #define start_of_data() (&__data_start ?: &etext)
  36
  37 #else /* not _LIBC */
  38
  39 #ifdef HAVE_SYS_RESOURCE_H
  40 # include <sys/time.h>
  41 # include <sys/resource.h>
  42 #else
  43 # if HAVE_SYS_VLIMIT_H
  44 #  include <sys/vlimit.h>       /* Obsolete, says glibc */
  45 # endif
  46 #endif
  47
  48 #ifdef CYGWIN
  49 #define BSD4_2
  50 #endif
  51
  52 #ifndef BSD4_2
  53 #ifndef USG
  54 #ifndef MSDOS
  55 #ifndef WINDOWSNT
  56 #include <sys/vlimit.h>
  57 #endif /* not WINDOWSNT */
  58 #endif /* not MSDOS */
  59 #endif /* not USG */
  60 #else /* if BSD4_2 */
  61 #include <sys/time.h>
  62 #include <sys/resource.h>
  63 #endif /* BSD4_2 */
  64
  65 #ifdef emacs
  66 /* The important properties of this type are that 1) it's a pointer, and
  67    2) arithmetic on it should work as if the size of the object pointed
  68    to has a size of 1.  */
  69 typedef POINTER_TYPE *POINTER;
  70
  71 typedef unsigned long SIZE;
  72
  73 #ifdef NULL
  74 #undef NULL
  75 #endif
  76 #define NULL ((POINTER) 0)
  77
  78 extern POINTER start_of_data ();
  79 #if defined USE_LSB_TAG
  80 #define EXCEEDS_LISP_PTR(ptr) 0
  81 #elif defined DATA_SEG_BITS
  82 #define EXCEEDS_LISP_PTR(ptr) \
  83   (((EMACS_UINT) (ptr) & ~DATA_SEG_BITS) >> VALBITS)
  84 #else
  85 #define EXCEEDS_LISP_PTR(ptr) ((EMACS_UINT) (ptr) >> VALBITS)
  86 #endif
  87
  88 #ifdef DATA_START
  89 #define start_of_data() ((char *)DATA_START)
  90 #endif
  91
  92 #ifdef BSD_SYSTEM
  93 #ifndef DATA_SEG_BITS
  94 #ifndef DATA_START
  95 extern char etext;
  96 #define start_of_data() &etext
  97 #endif
  98 #endif
  99 #endif
 100
 101 #else  /* not emacs */
 102 extern char etext;
 103 #define start_of_data() &etext
 104 #endif /* not emacs */
 105
 106 #endif /* not _LIBC */
 107
 108
 109 /* arch-tag: fe39244e-e54f-4208-b7aa-02556f7841c5
 110    (do not change this comment) */