/* How much read-only Lisp storage a dumped Emacs needs.
- Copyright (C) 1991 Free Software Foundation, Inc.
+ Copyright (C) 1993, 2002, 2003, 2004, 2005,
+ 2006 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 1, or (at your option)
+the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Emacs is distributed in the hope that it will be useful,
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
-/* # bytes of pure Lisp code to leave space for.
+/* Define PURESIZE, the number of bytes of pure Lisp code to leave space for.
At one point, this was defined in config.h, meaning that changing
PURESIZE would make Make recompile all of Emacs. But only a few
- files actually use PURESIZE, so we split it out to its own .h file. */
+ files actually use PURESIZE, so we split it out to its own .h file.
-#define PURESIZE 200000
+ Make sure to include this file after config.h, since that tells us
+ whether we are running X windows, which tells us how much pure
+ storage to allocate. */
-#ifdef VIRT_ADDR_VARIES
+/* First define a measure of the amount of data we have. */
-/* For machines like APOLLO where text and data can go anywhere
- in virtual memory. */
+/* A system configuration file may set this to request a certain extra
+ amount of storage. This is a lot more update-robust that defining
+ BASE_PURESIZE or even PURESIZE directly. */
+#ifndef SYSTEM_PURESIZE_EXTRA
+#define SYSTEM_PURESIZE_EXTRA 0
+#endif
+
+#ifndef SITELOAD_PURESIZE_EXTRA
+#define SITELOAD_PURESIZE_EXTRA 0
+#endif
+
+#ifndef BASE_PURESIZE
+#define BASE_PURESIZE (1200000 + SYSTEM_PURESIZE_EXTRA + SITELOAD_PURESIZE_EXTRA)
+#endif
+
+/* Increase BASE_PURESIZE by a ratio depending on the machine's word size. */
+#ifndef PURESIZE_RATIO
+#if BITS_PER_EMACS_INT > 32
+#define PURESIZE_RATIO 9/5 /* Don't surround with `()'. */
+#else
+#define PURESIZE_RATIO 1
+#endif
+#endif
+
+/* This is the actual size in bytes to allocate. */
+#ifndef PURESIZE
+#define PURESIZE (BASE_PURESIZE * PURESIZE_RATIO)
+#endif
+
+/* Signal an error if OBJ is pure. */
#define CHECK_IMPURE(obj) \
- { extern int pure[]; \
- if ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) ((char *) pure + PURESIZE) \
- && (PNTR_COMPARISON_TYPE) XPNTR (obj) >= (PNTR_COMPARISON_TYPE) pure) \
+ { if (PURE_P (obj)) \
pure_write_error (); }
+extern void pure_write_error P_ ((void));
+\f
+/* Define PURE_P. */
+
+#if defined(VIRT_ADDR_VARIES) || defined(CYGWIN)
+/* For machines like APOLLO where text and data can go anywhere
+ in virtual memory. */
+
+extern EMACS_INT pure[];
+
+#define PURE_P(obj) \
+ ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) ((char *) pure + PURESIZE) \
+ && (PNTR_COMPARISON_TYPE) XPNTR (obj) >= (PNTR_COMPARISON_TYPE) pure)
+
#else /* not VIRT_ADDR_VARIES */
#ifdef PNTR_COMPARISON_TYPE
+/* When PNTR_COMPARISON_TYPE is not the default (unsigned int). */
-/* when PNTR_COMPARISON_TYPE is not the default (unsigned int) */
-#define CHECK_IMPURE(obj) \
- { extern int my_edata; \
- if ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) &my_edata) \
- pure_write_error (); }
+extern char my_edata[];
+
+#define PURE_P(obj) \
+ ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) my_edata)
#else /* not VIRT_ADDRESS_VARIES, not PNTR_COMPARISON_TYPE */
-#define CHECK_IMPURE(obj) \
- { extern int my_edata; \
- if (XPNTR (obj) < (unsigned int) &my_edata) \
- pure_write_error (); }
+extern char my_edata[];
+
+#define PURE_P(obj) \
+ (XPNTR (obj) < (unsigned int) my_edata)
#endif /* PNTR_COMPARISON_TYPE */
#endif /* VIRT_ADDRESS_VARIES */
+/* arch-tag: fd9b0a91-a70e-4729-a75a-6bb4ca1ce14f
+ (do not change this comment) */