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code.delx.au - gnu-emacs/blob - src/puresize.h
1 /* How much read-only Lisp storage a dumped Emacs needs.
2 Copyright (C) 1993 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
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)
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.
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. */
20 /* Define PURESIZE, the number of bytes of pure Lisp code to leave space for.
22 At one point, this was defined in config.h, meaning that changing
23 PURESIZE would make Make recompile all of Emacs. But only a few
24 files actually use PURESIZE, so we split it out to its own .h file.
26 Make sure to include this file after config.h, since that tells us
27 whether we are running X windows, which tells us how much pure
28 storage to allocate. */
30 /* First define a measure of the amount of data we have. */
34 #define BASE_PURESIZE 260000
36 #define BASE_PURESIZE 215000
40 /* Increase BASE_PURESIZE by a ratio depending on the machine's word size. */
41 #ifndef PURESIZE_RATIO
42 #if VALBITS + GCTYPEBITS + 1 > 32
43 #define PURESIZE_RATIO 8/5 /* Don't surround with `()'. */
45 #define PURESIZE_RATIO 1
49 /* This is the actual size in bytes to allocate. */
51 #define PURESIZE (BASE_PURESIZE * PURESIZE_RATIO)
54 #ifdef VIRT_ADDR_VARIES
56 /* For machines like APOLLO where text and data can go anywhere
58 #define CHECK_IMPURE(obj) \
59 { extern EMACS_INT pure[]; \
60 if ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) ((char *) pure + PURESIZE) \
61 && (PNTR_COMPARISON_TYPE) XPNTR (obj) >= (PNTR_COMPARISON_TYPE) pure) \
62 pure_write_error (); }
64 #else /* not VIRT_ADDR_VARIES */
65 #ifdef PNTR_COMPARISON_TYPE
67 /* when PNTR_COMPARISON_TYPE is not the default (unsigned int) */
68 #define CHECK_IMPURE(obj) \
69 { extern EMACS_INT my_edata; \
70 if ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) &my_edata) \
71 pure_write_error (); }
73 #else /* not VIRT_ADDRESS_VARIES, not PNTR_COMPARISON_TYPE */
75 #define CHECK_IMPURE(obj) \
76 { extern EMACS_INT my_edata; \
77 if (XPNTR (obj) < (unsigned int) &my_edata) \
78 pure_write_error (); }
80 #endif /* PNTR_COMPARISON_TYPE */
81 #endif /* VIRT_ADDRESS_VARIES */