1 /* Static Heap management routines for XEmacs.
2 Copyright (C) 1994, 1998 Free Software Foundation, Inc.
4 This file is part of XEmacs.
6 XEmacs is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to the Free
18 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
25 #include <sheap-adjust.h>
27 #define STATIC_HEAP_BASE 0x800000
28 #define STATIC_HEAP_SLOP 0x40000
29 #define STATIC_HEAP_SIZE \
30 (STATIC_HEAP_BASE + SHEAP_ADJUSTMENT + STATIC_HEAP_SLOP)
31 #define BLOCKSIZE (1<<12)
32 #define ALLOC_UNIT (BLOCKSIZE-1)
33 #define ALLOC_MASK ~((unsigned long)(ALLOC_UNIT))
34 #define ALIGN_ALLOC(addr) ((((unsigned long)addr) + ALLOC_UNIT) & ALLOC_MASK)
36 char static_heap_buffer[STATIC_HEAP_SIZE]={0};
37 char* static_heap_base=static_heap_buffer;
38 char* static_heap_ptr=static_heap_buffer;
39 unsigned long static_heap_size=STATIC_HEAP_SIZE;
40 int static_heap_initialized=0;
41 int static_heap_dumped=0;
43 void* more_static_core ( ptrdiff_t increment );
44 void* more_static_core ( ptrdiff_t increment )
46 int size = (int) increment;
49 if (!static_heap_initialized)
52 if (((unsigned long) static_heap_base & ~VALMASK) != 0)
54 printf ("error: The heap was allocated in upper memory.\n");
58 static_heap_base=(char*)ALIGN_ALLOC(static_heap_buffer);
59 static_heap_ptr=static_heap_base;
60 static_heap_size=STATIC_HEAP_SIZE -
61 (static_heap_base-static_heap_buffer);
63 sbrk(BLOCKSIZE); /* force space for fork to work */
65 static_heap_initialized=1;
68 result = static_heap_ptr;
70 /* we don't need to align - handled by gmalloc. */
74 if (static_heap_ptr + size < static_heap_base)
81 if (static_heap_ptr + size >= static_heap_base + static_heap_size)
84 "\nRequested %d bytes, static heap exhausted! base is %p, current ptr\n"
85 "is %p. You have exhausted the static heap. \n"
87 "If you are simply trying to compile, remove sheap-adjust.h\n"
88 "and recompile from the top level. If this doesn't\n"
89 "work then STATIC_HEAP_SLOP (defined in this file) is too small.\n"
91 "If you want to run temacs, change SHEAP_ADJUSTMENT in sheap-adjust.h\n"
92 "to 0 or a +ve number. Generally you should *not* try to run temacs\n"
93 "with a static heap, you should dump first.\n", size,
94 static_heap_base, static_heap_ptr);
100 static_heap_ptr += size;
108 FILE *stream = fopen ("sheap-adjust.h", "w");
111 report_file_error ("Opening sheap adjustment file",
112 Fcons (build_string ("sheap-adjust.h"), Qnil));
115 "/*\tDo not edit this file!\n"
116 "\tAutomatically generated by XEmacs */\n"
117 "# define SHEAP_ADJUSTMENT (%d)\n",
118 ((static_heap_ptr - static_heap_buffer) - STATIC_HEAP_BASE));
122 void report_sheap_usage (int die_if_pure_storage_exceeded);
124 report_sheap_usage (int die_if_pure_storage_exceeded)
128 size_t lost = (STATIC_HEAP_BASE + STATIC_HEAP_SLOP + SHEAP_ADJUSTMENT)
129 - (static_heap_ptr - static_heap_buffer);
131 sprintf (buf, "Static heap usage: %ld of %ld",
132 (long) (static_heap_ptr - static_heap_buffer),
133 (long) (STATIC_HEAP_BASE + STATIC_HEAP_SLOP + SHEAP_ADJUSTMENT));
135 if (lost > STATIC_HEAP_SLOP) {
136 sprintf (buf + strlen (buf), " -- %ldk wasted", (long)(lost/1024));
137 if (die_if_pure_storage_exceeded) {
146 fatal ("Static heap size adjusted, Don't Panic! I will restart the `make'");