| 1 | /* How much read-only Lisp storage a dumped Emacs needs. |
| 2 | Copyright (C) 1993 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 2, 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, Inc., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | /* Define PURESIZE, the number of bytes of pure Lisp code to leave space for. |
| 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 |
| 25 | files actually use PURESIZE, so we split it out to its own .h file. |
| 26 | |
| 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 | |
| 31 | /* First define a measure of the amount of data we have. */ |
| 32 | |
| 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 | |
| 40 | #ifndef SITELOAD_PURESIZE_EXTRA |
| 41 | #define SITELOAD_PURESIZE_EXTRA 0 |
| 42 | #endif |
| 43 | |
| 44 | #ifndef BASE_PURESIZE |
| 45 | #define BASE_PURESIZE (675000 + SYSTEM_PURESIZE_EXTRA + SITELOAD_PURESIZE_EXTRA) |
| 46 | #endif |
| 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) |
| 60 | #endif |
| 61 | |
| 62 | /* Signal an error if OBJ is pure. */ |
| 63 | #define CHECK_IMPURE(obj) \ |
| 64 | { if (PURE_P (obj)) \ |
| 65 | pure_write_error (); } |
| 66 | |
| 67 | extern void pure_write_error P_ ((void)); |
| 68 | \f |
| 69 | /* Define PURE_P. */ |
| 70 | |
| 71 | #ifdef VIRT_ADDR_VARIES |
| 72 | /* For machines like APOLLO where text and data can go anywhere |
| 73 | in virtual memory. */ |
| 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) |
| 80 | |
| 81 | #else /* not VIRT_ADDR_VARIES */ |
| 82 | #ifdef PNTR_COMPARISON_TYPE |
| 83 | /* When PNTR_COMPARISON_TYPE is not the default (unsigned int). */ |
| 84 | |
| 85 | extern char my_edata[]; |
| 86 | |
| 87 | #define PURE_P(obj) \ |
| 88 | ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) my_edata) |
| 89 | |
| 90 | #else /* not VIRT_ADDRESS_VARIES, not PNTR_COMPARISON_TYPE */ |
| 91 | |
| 92 | extern char my_edata[]; |
| 93 | |
| 94 | #define PURE_P(obj) \ |
| 95 | (XPNTR (obj) < (unsigned int) my_edata) |
| 96 | |
| 97 | #endif /* PNTR_COMPARISON_TYPE */ |
| 98 | #endif /* VIRT_ADDRESS_VARIES */ |