Mercurial > hg > xemacs-beta
annotate src/sheap.c @ 5533:11da5b828d10
shell-command and shell-command-on-region API compliant with FSF 23.3.1
| author | Mats Lidell <mats.lidell@cag.se> |
|---|---|
| date | Sun, 31 Jul 2011 01:29:09 +0200 |
| parents | 308d34e9f07d |
| children |
| rev | line source |
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| 428 | 1 /* Static Heap management routines for XEmacs. |
| 2 Copyright (C) 1994, 1998 Free Software Foundation, Inc. | |
| 3 | |
| 4 This file is part of XEmacs. | |
| 5 | |
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6 XEmacs is free software: you can redistribute it and/or modify it |
| 428 | 7 under the terms of the GNU General Public License as published by the |
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8 Free Software Foundation, either version 3 of the License, or (at your |
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9 option) any later version. |
| 428 | 10 |
| 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 | |
| 14 for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
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17 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 18 |
| 19 #include <config.h> | |
| 20 #include "lisp.h" | |
| 442 | 21 |
| 771 | 22 #include "sysfile.h" |
| 23 | |
| 428 | 24 #include <unistd.h> |
| 25 #include <sheap-adjust.h> | |
| 26 | |
| 27 #define STATIC_HEAP_BASE 0x800000 | |
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28 #define STATIC_HEAP_SLOP 0x80000 |
| 428 | 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) | |
| 35 | |
| 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; | |
| 42 | |
| 853 | 43 void *more_static_core ( ptrdiff_t increment ); |
| 44 void *more_static_core ( ptrdiff_t increment ) | |
| 428 | 45 { |
| 46 int size = (int) increment; | |
| 47 void *result; | |
| 48 | |
| 49 if (!static_heap_initialized) | |
| 50 { | |
| 51 #ifdef VALMASK | |
| 52 if (((unsigned long) static_heap_base & ~VALMASK) != 0) | |
| 53 { | |
| 54 printf ("error: The heap was allocated in upper memory.\n"); | |
| 55 exit (-1); | |
| 56 } | |
| 57 #endif | |
| 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); | |
| 442 | 62 #ifdef CYGWIN |
| 428 | 63 sbrk(BLOCKSIZE); /* force space for fork to work */ |
| 64 #endif | |
| 65 static_heap_initialized=1; | |
| 66 } | |
| 67 | |
| 68 result = static_heap_ptr; | |
| 69 | |
| 70 /* we don't need to align - handled by gmalloc. */ | |
| 71 | |
| 72 if (size < 0) | |
| 73 { | |
| 74 if (static_heap_ptr + size < static_heap_base) | |
| 75 { | |
| 76 return 0; | |
| 77 } | |
| 78 } | |
| 79 else | |
| 80 { | |
| 81 if (static_heap_ptr + size >= static_heap_base + static_heap_size) | |
| 82 { | |
| 1111 | 83 printf ( |
| 84 "\nRequested %d bytes, static heap exhausted! base is %p, current ptr\n" | |
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85 "is %p, static heap size is %ld. You have exhausted the static heap. \n" |
| 1111 | 86 "\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" | |
| 90 "\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", | |
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94 size, static_heap_base, static_heap_ptr, static_heap_size); |
| 428 | 95 |
| 96 exit(-1); | |
| 97 return 0; | |
| 98 } | |
| 99 } | |
| 100 static_heap_ptr += size; | |
| 101 | |
| 102 return result; | |
| 103 } | |
| 104 | |
| 105 static void | |
| 903 | 106 sheap_adjust_h (long adjust) |
| 428 | 107 { |
| 771 | 108 FILE *stream = retry_fopen ("sheap-adjust.h", "w"); |
| 428 | 109 |
| 110 if (stream == NULL) | |
| 111 report_file_error ("Opening sheap adjustment file", | |
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112 build_ascstring ("sheap-adjust.h")); |
| 428 | 113 |
| 114 fprintf (stream, | |
| 115 "/*\tDo not edit this file!\n" | |
| 116 "\tAutomatically generated by XEmacs */\n" | |
| 903 | 117 "# define SHEAP_ADJUSTMENT (%ld)\n", adjust); |
| 771 | 118 retry_fclose (stream); |
| 428 | 119 } |
| 120 | |
| 442 | 121 void report_sheap_usage (int die_if_pure_storage_exceeded); |
| 428 | 122 void |
| 123 report_sheap_usage (int die_if_pure_storage_exceeded) | |
| 124 { | |
| 125 int rc = 0; | |
| 126 | |
| 903 | 127 Bytecount lost = STATIC_HEAP_SIZE |
| 428 | 128 - (static_heap_ptr - static_heap_buffer); |
| 129 char buf[200]; | |
| 1157 | 130 sprintf (buf, "Static heap usage: %ldk of %ldk, slop is %ldk", |
| 131 (long) ((static_heap_ptr - static_heap_buffer) /1024), | |
| 132 (long) (STATIC_HEAP_SIZE / 1024), | |
| 133 (long) STATIC_HEAP_SLOP / 1024); | |
| 428 | 134 |
| 1315 | 135 if (lost > STATIC_HEAP_SLOP) |
| 136 { | |
| 137 sprintf (buf + strlen (buf), " -- %ldk wasted", (long)(lost/1024)); | |
| 138 if (die_if_pure_storage_exceeded) | |
| 139 { | |
| 140 sheap_adjust_h(STATIC_HEAP_SLOP - lost); | |
| 141 sprintf (buf + strlen (buf), " -- reset to %ldk", | |
| 142 (long) ((STATIC_HEAP_SIZE + STATIC_HEAP_SLOP - lost) / | |
| 143 1024)); | |
| 144 rc = -1; | |
| 145 } | |
| 146 message ("%s\n", buf); | |
| 428 | 147 } |
| 148 | |
| 1315 | 149 if (rc < 0) |
| 150 { | |
| 151 unlink ("SATISFIED"); | |
| 152 stderr_out ("Static heap size adjusted, don't panic! I will restart the `make'\n"); | |
| 153 exit (0); | |
| 154 } | |
| 428 | 155 } |
| 156 | |
| 157 |