mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-12 09:28:24 +00:00
116 lines
3.4 KiB
C
116 lines
3.4 KiB
C
/* How much read-only Lisp storage a dumped Emacs needs.
|
|
Copyright (C) 1993, 2001-2022 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 3 of the License, or (at
|
|
your option) any later version.
|
|
|
|
GNU Emacs is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef EMACS_PURESIZE_H
|
|
#define EMACS_PURESIZE_H
|
|
|
|
#include "lisp.h"
|
|
|
|
INLINE_HEADER_BEGIN
|
|
|
|
/* 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.
|
|
|
|
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. */
|
|
|
|
/* First define a measure of the amount of data we have. */
|
|
|
|
/* 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 (2000000 + SYSTEM_PURESIZE_EXTRA + SITELOAD_PURESIZE_EXTRA)
|
|
#endif
|
|
|
|
/* Increase BASE_PURESIZE by a ratio depending on the machine's word size. */
|
|
#ifndef PURESIZE_RATIO
|
|
#if EMACS_INT_MAX >> 31 != 0
|
|
#if PTRDIFF_MAX >> 31 != 0
|
|
#define PURESIZE_RATIO 10 / 6 /* Don't surround with `()'. */
|
|
#else
|
|
#define PURESIZE_RATIO 8 / 6 /* Don't surround with `()'. */
|
|
#endif
|
|
#else
|
|
#define PURESIZE_RATIO 1
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef ENABLE_CHECKING
|
|
/* ENABLE_CHECKING somehow increases the purespace used, probably because
|
|
it tends to cause some macro arguments to be evaluated twice. This is
|
|
a bug, but it's difficult to track it down. */
|
|
#define PURESIZE_CHECKING_RATIO 12 / 10 /* Don't surround with `()'. */
|
|
#else
|
|
#define PURESIZE_CHECKING_RATIO 1
|
|
#endif
|
|
|
|
/* This is the actual size in bytes to allocate. */
|
|
#ifndef PURESIZE
|
|
#define PURESIZE (BASE_PURESIZE * PURESIZE_RATIO * PURESIZE_CHECKING_RATIO)
|
|
#endif
|
|
|
|
extern AVOID pure_write_error (Lisp_Object);
|
|
|
|
extern EMACS_INT pure[];
|
|
|
|
/* The puresize_h_* macros are private to this include file. */
|
|
|
|
/* True if PTR is pure. */
|
|
|
|
#define puresize_h_PURE_P(ptr) \
|
|
((uintptr_t) (ptr) - (uintptr_t) pure <= PURESIZE)
|
|
|
|
INLINE bool
|
|
PURE_P (void *ptr)
|
|
{
|
|
return puresize_h_PURE_P (ptr);
|
|
}
|
|
|
|
/* Signal an error if OBJ is pure. PTR is OBJ untagged. */
|
|
|
|
#define puresize_h_CHECK_IMPURE(obj, ptr) \
|
|
(PURE_P (ptr) ? pure_write_error (obj) : (void) 0)
|
|
|
|
INLINE void
|
|
CHECK_IMPURE (Lisp_Object obj, void *ptr)
|
|
{
|
|
puresize_h_CHECK_IMPURE (obj, ptr);
|
|
}
|
|
|
|
#if DEFINE_KEY_OPS_AS_MACROS
|
|
# define PURE_P(ptr) puresize_h_PURE_P (ptr)
|
|
# define CHECK_IMPURE(obj, ptr) puresize_h_CHECK_IMPURE (obj, ptr)
|
|
#endif
|
|
|
|
INLINE_HEADER_END
|
|
|
|
#endif /* EMACS_PURESIZE_H */
|