src/mem-limits.h

   1 /* Includes for memory limit warnings.
   2    Copyright (C) 1990 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 1, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #ifndef BSD4_2
  21 #ifndef USG
  22 #include <sys/vlimit.h>
  23 #endif /* not USG */
  24 #else /* if BSD4_2 */
  25 #include <sys/time.h>
  26 #include <sys/resource.h>
  27 #endif /* BSD4_2 */
  28
  29 #ifdef __STDC__
  30 typedef void *POINTER;
  31 #else
  32 typedef char *POINTER;
  33 #endif
  34
  35 typedef unsigned long SIZE;
  36
  37 #ifdef NULL
  38 #undef NULL
  39 #endif
  40 #define NULL ((POINTER) 0)
  41
  42 #ifdef emacs
  43 extern POINTER start_of_data ();
  44
  45 #ifdef BSD
  46 #ifndef DATA_SEG_BITS
  47 #define start_of_data() &etext
  48 #endif
  49 #endif
  50
  51 #else  /* Not emacs */
  52 #define start_of_data() &etext
  53 #endif /* Not emacs */
  54
  55
  56
  57 /* start of data space; can be changed by calling malloc_init */
  58 static POINTER data_space_start;
  59
  60 /* Number of bytes of writable memory we can expect to be able to get */
  61 static unsigned int lim_data;
  62
  63
  64
  65 #ifdef USG
  66
  67 get_lim_data ()
  68 {
  69   extern long ulimit ();
  70
  71 #ifdef ULIMIT_BREAK_VALUE
  72   lim_data = ULIMIT_BREAK_VALUE;
  73 #else
  74   lim_data = ulimit (3, 0);
  75 #endif
  76
  77   lim_data -= (long) data_space_start;
  78 }
  79
  80 #else /* not USG */
  81 #ifndef BSD4_2
  82
  83 get_lim_data ()
  84 {
  85   lim_data = vlimit (LIM_DATA, -1);
  86 }
  87
  88 #else /* BSD4_2 */
  89
  90 get_lim_data ()
  91 {
  92   struct rlimit XXrlimit;
  93
  94   getrlimit (RLIMIT_DATA, &XXrlimit);
  95 #ifdef RLIM_INFINITY
  96   lim_data = XXrlimit.rlim_cur & RLIM_INFINITY; /* soft limit */
  97 #else
  98   lim_data = XXrlimit.rlim_cur; /* soft limit */
  99 #endif
 100 }
 101 #endif /* BSD4_2 */
 102 #endif /* not USG */