/* Static Heap management routines for XEmacs.
Copyright (C) 1994, 1998 Free Software Foundation, Inc.
This file is part of XEmacs.
XEmacs 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 2, or (at your option) any
XEmacs 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 XEmacs; see the file COPYING. If not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
#define STATIC_HEAP_BASE 0x800000
#define STATIC_HEAP_SLOP 0x80000
#define STATIC_HEAP_SIZE \
(STATIC_HEAP_BASE + SHEAP_ADJUSTMENT + STATIC_HEAP_SLOP)
#define BLOCKSIZE (1<<12)
#define ALLOC_UNIT (BLOCKSIZE-1)
#define ALLOC_MASK ~((unsigned long)(ALLOC_UNIT))
#define ALIGN_ALLOC(addr) ((((unsigned long)addr) + ALLOC_UNIT) & ALLOC_MASK)
unsigned long static_heap_size=STATIC_HEAP_SIZE;
void *more_static_core ( ptrdiff_t increment );
void *more_static_core ( ptrdiff_t increment )
int size = (int) increment;
if (((unsigned long) static_heap_base & ~VALMASK) != 0)
printf ("error: The heap was allocated in upper memory.\n");
sbrk(BLOCKSIZE); /* force space for fork to work */
result = static_heap_ptr;
/* we don't need to align - handled by gmalloc. */
if (size < 0)
if (static_heap_ptr + size < static_heap_base)
if (static_heap_ptr + size >= static_heap_base + static_heap_size)
"\nRequested %d bytes, static heap exhausted! base is %p, current ptr\n"
"is %p, static heap size is %ld. You have exhausted the static heap. \n"
"If you are simply trying to compile, remove sheap-adjust.h\n"
"and recompile from the top level. If this doesn't\n"
"work then STATIC_HEAP_SLOP (defined in this file) is too small.\n"
"If you want to run temacs, change SHEAP_ADJUSTMENT in sheap-adjust.h\n"
"to 0 or a +ve number. Generally you should *not* try to run temacs\n"
"with a static heap, you should dump first.\n",
size, static_heap_base, static_heap_ptr, static_heap_size);
static_heap_ptr += size;
sheap_adjust_h (long adjust)
FILE *stream = retry_fopen ("sheap-adjust.h", "w");
if (stream == NULL)
report_file_error ("Opening sheap adjustment file",
"/*\tDo not edit this file!\n"
"\tAutomatically generated by XEmacs */\n"
"# define SHEAP_ADJUSTMENT (%ld)\n", adjust);
void report_sheap_usage (int die_if_pure_storage_exceeded);
report_sheap_usage (int die_if_pure_storage_exceeded)
int rc = 0;
Bytecount lost = STATIC_HEAP_SIZE
- (static_heap_ptr - static_heap_buffer);
sprintf (buf, "Static heap usage: %ldk of %ldk, slop is %ldk",
(long) ((static_heap_ptr - static_heap_buffer) /1024),
(long) (STATIC_HEAP_SIZE / 1024),
(long) STATIC_HEAP_SLOP / 1024);
if (lost > STATIC_HEAP_SLOP)
sprintf (buf + strlen (buf), " -- %ldk wasted", (long)(lost/1024));
sheap_adjust_h(STATIC_HEAP_SLOP - lost);
sprintf (buf + strlen (buf), " -- reset to %ldk",
(long) ((STATIC_HEAP_SIZE + STATIC_HEAP_SLOP - lost) /
rc = -1;
message ("%s\n", buf);
if (rc < 0)
stderr_out ("Static heap size adjusted, don't panic! I will restart the `make'\n");