Commit | Line | Data |
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e772f7cd | 1 | /* How much read-only Lisp storage a dumped Emacs needs. |
c6c5df7f | 2 | Copyright (C) 1993 Free Software Foundation, Inc. |
e772f7cd JB |
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 | |
7c938215 | 8 | the Free Software Foundation; either version 2, or (at your option) |
e772f7cd JB |
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 | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
e772f7cd | 20 | |
e4f74c7e | 21 | /* Define PURESIZE, the number of bytes of pure Lisp code to leave space for. |
e772f7cd JB |
22 | |
23 | At one point, this was defined in config.h, meaning that changing | |
24 | PURESIZE would make Make recompile all of Emacs. But only a few | |
d427b66a | 25 | files actually use PURESIZE, so we split it out to its own .h file. |
e772f7cd | 26 | |
d427b66a JB |
27 | Make sure to include this file after config.h, since that tells us |
28 | whether we are running X windows, which tells us how much pure | |
29 | storage to allocate. */ | |
30 | ||
e4f74c7e RS |
31 | /* First define a measure of the amount of data we have. */ |
32 | ||
87485d6f MW |
33 | /* A system configuration file may set this to request a certain extra |
34 | amount of storage. This is a lot more update-robust that defining | |
35 | BASE_PURESIZE or even PURESIZE directly. */ | |
36 | #ifndef SYSTEM_PURESIZE_EXTRA | |
37 | #define SYSTEM_PURESIZE_EXTRA 0 | |
38 | #endif | |
39 | ||
64aba29c RS |
40 | #ifndef SITELOAD_PURESIZE_EXTRA |
41 | #define SITELOAD_PURESIZE_EXTRA 0 | |
42 | #endif | |
43 | ||
e4f74c7e | 44 | #ifndef BASE_PURESIZE |
bbd25f47 | 45 | #define BASE_PURESIZE (500000 + SYSTEM_PURESIZE_EXTRA + SITELOAD_PURESIZE_EXTRA) |
d427b66a | 46 | #endif |
e4f74c7e RS |
47 | |
48 | /* Increase BASE_PURESIZE by a ratio depending on the machine's word size. */ | |
49 | #ifndef PURESIZE_RATIO | |
50 | #if VALBITS + GCTYPEBITS + 1 > 32 | |
51 | #define PURESIZE_RATIO 8/5 /* Don't surround with `()'. */ | |
52 | #else | |
53 | #define PURESIZE_RATIO 1 | |
54 | #endif | |
55 | #endif | |
56 | ||
57 | /* This is the actual size in bytes to allocate. */ | |
58 | #ifndef PURESIZE | |
59 | #define PURESIZE (BASE_PURESIZE * PURESIZE_RATIO) | |
d427b66a | 60 | #endif |
e772f7cd | 61 | |
f75e1ee5 KH |
62 | /* Signal an error if OBJ is pure. */ |
63 | #define CHECK_IMPURE(obj) \ | |
64 | { if (PURE_P (obj)) \ | |
65 | pure_write_error (); } | |
ec5d8db7 AS |
66 | |
67 | extern void pure_write_error P_ ((void)); | |
f75e1ee5 KH |
68 | \f |
69 | /* Define PURE_P. */ | |
e772f7cd | 70 | |
f75e1ee5 | 71 | #ifdef VIRT_ADDR_VARIES |
e772f7cd JB |
72 | /* For machines like APOLLO where text and data can go anywhere |
73 | in virtual memory. */ | |
f75e1ee5 KH |
74 | |
75 | extern EMACS_INT pure[]; | |
76 | ||
77 | #define PURE_P(obj) \ | |
78 | ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) ((char *) pure + PURESIZE) \ | |
79 | && (PNTR_COMPARISON_TYPE) XPNTR (obj) >= (PNTR_COMPARISON_TYPE) pure) | |
e772f7cd JB |
80 | |
81 | #else /* not VIRT_ADDR_VARIES */ | |
82 | #ifdef PNTR_COMPARISON_TYPE | |
f75e1ee5 | 83 | /* When PNTR_COMPARISON_TYPE is not the default (unsigned int). */ |
e772f7cd | 84 | |
f75e1ee5 KH |
85 | extern char my_edata[]; |
86 | ||
87 | #define PURE_P(obj) \ | |
88 | ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) my_edata) | |
e772f7cd JB |
89 | |
90 | #else /* not VIRT_ADDRESS_VARIES, not PNTR_COMPARISON_TYPE */ | |
91 | ||
f75e1ee5 KH |
92 | extern char my_edata[]; |
93 | ||
94 | #define PURE_P(obj) \ | |
95 | (XPNTR (obj) < (unsigned int) my_edata) | |
e772f7cd JB |
96 | |
97 | #endif /* PNTR_COMPARISON_TYPE */ | |
98 | #endif /* VIRT_ADDRESS_VARIES */ | |
99 |