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0
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1 /* Synched up with: Not synched up with FSF 19.28, even though I
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2 thought I did so. */
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3
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4 /* Get the configuration files if we're being compiled for Emacs. */
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5 #ifdef emacs
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6 # include <config.h>
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7 # include "getpagesize.h"
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8 # ifndef HAVE_CONFIG_H
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9 # define HAVE_CONFIG_H
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10 # endif
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11 #endif
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12
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13 #if defined (__STDC__) && !defined (STDC_HEADERS)
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14 /* The ANSI standard says that defining __STDC__ to a non-zero value means
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15 that the compiler conforms to that standard. The standard requires
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16 certain header files and library functions to be present. Therefore,
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17 if your compiler defines __STDC__ to non-0 but does not have ANSI headers
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18 and the ANSI library routines, then your compiler is buggy. Conversely,
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19 an ANSI-conforming environment (which has both the ANSI headers and
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20 library routines, i.e., stdlib.h and `memmove') does not necessarily
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21 define the STDC_HEADERS flag. Lucid Emacs requires an ANSI compiler.
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22 Therefore, there is no need to consult the abominable STDC_HEADERS flag.
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23 -- jwz
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24 */
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25 # define STDC_HEADERS
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26 #endif
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27
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28 #define __const const
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29
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30
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31 /* DO NOT EDIT THIS FILE -- it is automagically generated. -*- C -*- */
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32 /* Bwaa-haa-haa! Not a chance that this is actually true! */
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33
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34 #define _MALLOC_INTERNAL
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35
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36 /* The malloc headers and source files from the C library follow here. */
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37
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38 /* Declarations for `malloc' and friends.
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39 Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
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40 Written May 1989 by Mike Haertel.
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41
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42 This library is free software; you can redistribute it and/or
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43 modify it under the terms of the GNU Library General Public License as
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44 published by the Free Software Foundation; either version 2 of the
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45 License, or (at your option) any later version.
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46
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47 This library is distributed in the hope that it will be useful,
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48 but WITHOUT ANY WARRANTY; without even the implied warranty of
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49 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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50 Library General Public License for more details.
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51
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52 You should have received a copy of the GNU General Public License
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53 along with this library; see the file COPYING. If not, write to
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54 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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55 Boston, MA 02111-1307, USA.
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56
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57 The author may be reached (Email) at the address mike@ai.mit.edu,
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58 or (US mail) as Mike Haertel c/o Free Software Foundation, Inc. */
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59
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60 #ifndef _MALLOC_H
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61
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62 #define _MALLOC_H 1
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63
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64 #ifdef _MALLOC_INTERNAL
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65
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66 #ifdef HAVE_CONFIG_H
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67 #include <config.h>
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68 #endif
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69
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70 #if defined(_LIBC) || defined(STDC_HEADERS) || defined(USG)
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71 #include <string.h>
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72 #else
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73 #ifndef memset
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74 #define memset(s, zero, n) bzero ((s), (n))
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75 #endif
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76 #ifndef memcpy
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77 #define memcpy(d, s, n) bcopy ((s), (d), (n))
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78 #endif
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79 #endif
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80
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81 #if defined(__GNU_LIBRARY__) || defined(__STDC__)
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82 #include <limits.h>
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83 #else
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84 #define CHAR_BIT 8
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85 #endif
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86
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87 #ifdef HAVE_UNISTD_H
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88 #include <unistd.h>
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89 #endif
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90
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91 #endif /* _MALLOC_INTERNAL. */
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92
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93
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94 #ifdef __cplusplus
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95 extern "C"
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96 {
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97 #endif
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98
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99 /* #### XEmacs change for Solaris */
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100 #if defined (__cplusplus) || (defined (__STDC__) && __STDC__) || \
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100
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101 (defined (__STDC__) && defined (SOLARIS2)) || defined (WINDOWSNT)
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0
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102 #undef __P
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103 #define __P(args) args
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104 #undef __ptr_t
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105 #define __ptr_t void *
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106 #else /* Not C++ or ANSI C. */
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107 #undef __P
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108 #define __P(args) ()
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109 #undef const
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110 #define const
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111 #undef __ptr_t
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112 #define __ptr_t char *
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113 #endif /* C++ or ANSI C. */
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114
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115 #ifdef __STDC__
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116 #include <stddef.h>
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117 #define __malloc_size_t size_t
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118 #else
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119 #ifdef OSF1 /* from grunwald@foobar.cs.colorado.edu */
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120 #define __malloc_size_t unsigned long
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121 #else
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122 #define __malloc_size_t unsigned int
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123 #endif
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124 #endif
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125
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126 #ifndef NULL
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127 #define NULL 0
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128 #endif
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129
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130 /* XEmacs: I thought this should be int under SunOS, but that
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131 apparently fails. Curses on all this shit. */
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132 #define __free_ret_t void
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133
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134 /* XEmacs: I tried commenting these out and including stdlib.h,
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135 but that fails badly. Urk! This sucks. */
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136 /* Allocate SIZE bytes of memory. */
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137 extern __ptr_t malloc __P ((size_t __size));
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138 /* Re-allocate the previously allocated block
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139 in __ptr_t, making the new block SIZE bytes long. */
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140 extern __ptr_t realloc __P ((__ptr_t __ptr, size_t __size));
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141 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
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142 extern __ptr_t calloc __P ((size_t __nmemb, size_t __size));
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143 /* Free a block allocated by `malloc', `realloc' or `calloc'. */
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144 extern __free_ret_t free __P ((__ptr_t __ptr));
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145
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146 /* Allocate SIZE bytes allocated to ALIGNMENT bytes. */
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147 extern __ptr_t memalign __P ((size_t __alignment, size_t __size));
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148
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149 /* Allocate SIZE bytes on a page boundary. */
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150 extern __ptr_t valloc __P ((size_t __size));
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151
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152
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153 #ifdef _MALLOC_INTERNAL
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154
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155 /* The allocator divides the heap into blocks of fixed size; large
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156 requests receive one or more whole blocks, and small requests
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157 receive a fragment of a block. Fragment sizes are powers of two,
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158 and all fragments of a block are the same size. When all the
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159 fragments in a block have been freed, the block itself is freed. */
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160 #define INT_BIT (CHAR_BIT * sizeof(int))
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161 #define BLOCKLOG (INT_BIT > 16 ? 12 : 9)
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162 #define BLOCKSIZE (1 << BLOCKLOG)
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163 #define BLOCKIFY(SIZE) (((SIZE) + BLOCKSIZE - 1) / BLOCKSIZE)
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164
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165 /* Determine the amount of memory spanned by the initial heap table
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166 (not an absolute limit). */
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167 #define HEAP (INT_BIT > 16 ? 4194304 : 65536)
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168
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169 /* Number of contiguous free blocks allowed to build up at the end of
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170 memory before they will be returned to the system. */
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171 #define FINAL_FREE_BLOCKS 8
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172
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173 /* Data structure giving per-block information. */
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174 typedef union
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175 {
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176 /* Heap information for a busy block. */
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177 struct
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178 {
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179 /* Zero for a large block, or positive giving the
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180 logarithm to the base two of the fragment size. */
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181 int type;
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182 union
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183 {
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184 struct
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185 {
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186 __malloc_size_t nfree; /* Free frags in a fragmented block. */
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187 __malloc_size_t first; /* First free fragment of the block. */
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188 } frag;
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189 /* Size (in blocks) of a large cluster. */
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190 __malloc_size_t size;
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191 } info;
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192 } busy;
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193 /* Heap information for a free block
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194 (that may be the first of a free cluster). */
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195 struct
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196 {
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197 __malloc_size_t size; /* Size (in blocks) of a free cluster. */
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198 __malloc_size_t next; /* Index of next free cluster. */
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199 __malloc_size_t prev; /* Index of previous free cluster. */
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200 } free;
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201 } malloc_info;
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202
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203 /* Pointer to first block of the heap. */
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204 extern char *_heapbase;
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205
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206 /* Table indexed by block number giving per-block information. */
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207 extern malloc_info *_heapinfo;
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208
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209 /* Address to block number and vice versa. */
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210 #define BLOCK(A) (((char *) (A) - _heapbase) / BLOCKSIZE + 1)
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211 #define ADDRESS(B) ((__ptr_t) (((B) - 1) * BLOCKSIZE + _heapbase))
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212
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213 /* Current search index for the heap table. */
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214 extern __malloc_size_t _heapindex;
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215
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216 /* Limit of valid info table indices. */
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217 extern __malloc_size_t _heaplimit;
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218
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219 /* Doubly linked lists of free fragments. */
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220 struct list
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185
|
221 {
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|
|
222 struct list *next;
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223 struct list *prev;
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224 };
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0
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225
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226 /* Free list headers for each fragment size. */
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227 extern struct list _fraghead[];
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228
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|
229 /* List of blocks allocated with `memalign' (or `valloc'). */
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230 struct alignlist
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185
|
231 {
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|
|
232 struct alignlist *next;
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|
233 __ptr_t aligned; /* The address that memaligned returned. */
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234 __ptr_t exact; /* The address that malloc returned. */
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|
235 };
|
|
0
|
236 extern struct alignlist *_aligned_blocks;
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237
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|
|
238 /* Instrumentation. */
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239 extern __malloc_size_t _chunks_used;
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240 extern __malloc_size_t _bytes_used;
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241 extern __malloc_size_t _chunks_free;
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242 extern __malloc_size_t _bytes_free;
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243
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244 /* Internal version of `free' used in `morecore' (malloc.c). */
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245 extern void _free_internal __P ((__ptr_t __ptr));
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246
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247 #endif /* _MALLOC_INTERNAL. */
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248
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|
249 /* Underlying allocation function; successive calls should
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250 return contiguous pieces of memory. */
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251 extern __ptr_t (*__morecore) __P ((ptrdiff_t __size));
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252
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253 /* Default value of `__morecore'. */
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254 extern __ptr_t __default_morecore __P ((ptrdiff_t __size));
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255
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|
|
256 /* If not NULL, this function is called after each time
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257 `__morecore' is called to increase the data size. */
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|
258 extern void (*__after_morecore_hook) __P ((void));
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|
|
259
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|
|
260 /* Nonzero if `malloc' has been called and done its initialization. */
|
|
88
|
261 /* extern int __malloc_initialized; */
|
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0
|
262
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|
|
263 /* Hooks for debugging versions. */
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|
264 extern void (*__free_hook) __P ((__ptr_t __ptr));
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|
|
265 extern __ptr_t (*__malloc_hook) __P ((size_t __size));
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266 extern __ptr_t (*__realloc_hook) __P ((__ptr_t __ptr, size_t __size));
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267
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268 /* Return values for `mprobe': these are the kinds of inconsistencies that
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269 `mcheck' enables detection of. */
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|
270 enum mcheck_status
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|
185
|
271 {
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|
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272 MCHECK_DISABLED = -1, /* Consistency checking is not turned on. */
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|
273 MCHECK_OK, /* Block is fine. */
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274 MCHECK_FREE, /* Block freed twice. */
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|
275 MCHECK_HEAD, /* Memory before the block was clobbered. */
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|
|
276 MCHECK_TAIL /* Memory after the block was clobbered. */
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|
277 };
|
|
0
|
278
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|
|
279 /* Activate a standard collection of debugging hooks. This must be called
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|
280 before `malloc' is ever called. ABORTFUNC is called with an error code
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|
281 (see enum above) when an inconsistency is detected. If ABORTFUNC is
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282 null, the standard function prints on stderr and then calls `abort'. */
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|
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283 extern int mcheck __P ((void (*__abortfunc) __P ((enum mcheck_status))));
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284
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|
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285 /* Check for aberrations in a particular malloc'd block. You must have
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286 called `mcheck' already. These are the same checks that `mcheck' does
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287 when you free or reallocate a block. */
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|
|
288 extern enum mcheck_status mprobe __P ((__ptr_t __ptr));
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|
|
289
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|
|
290 /* Activate a standard collection of tracing hooks. */
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|
|
291 extern void mtrace __P ((void));
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|
|
292 extern void muntrace __P ((void));
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|
|
293
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|
|
294 /* Statistics available to the user. */
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|
|
295 struct mstats
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|
185
|
296 {
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|
|
297 __malloc_size_t bytes_total; /* Total size of the heap. */
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|
|
298 __malloc_size_t chunks_used; /* Chunks allocated by the user. */
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|
|
299 __malloc_size_t bytes_used; /* Byte total of user-allocated chunks. */
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|
300 __malloc_size_t chunks_free; /* Chunks in the free list. */
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301 __malloc_size_t bytes_free; /* Byte total of chunks in the free list. */
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302 };
|
|
0
|
303
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|
304 /* Pick up the current statistics. */
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|
|
305 extern struct mstats mstats __P ((void));
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|
306
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|
|
307 /* Call WARNFUN with a warning message when memory usage is high. */
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|
308 extern void memory_warnings __P ((__ptr_t __start,
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|
|
309 void (*__warnfun) __P ((__const char *))));
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310
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311
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|
|
312 #if 0 /* unused in this file, and conflicting prototypes anyway */
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313 /* Relocating allocator. */
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314
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|
|
315 /* Allocate SIZE bytes, and store the address in *HANDLEPTR. */
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|
316 extern __ptr_t r_alloc __P ((__ptr_t *__handleptr, size_t __size));
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|
|
317
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|
|
318 /* Free the storage allocated in HANDLEPTR. */
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|
|
319 extern void r_alloc_free __P ((__ptr_t *__handleptr));
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|
|
320
|
|
|
321 /* Adjust the block at HANDLEPTR to be SIZE bytes long. */
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|
|
322 extern __ptr_t r_re_alloc __P ((__ptr_t *__handleptr, size_t __size));
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|
|
323 #endif /* 0 */
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|
324
|
|
|
325 #ifdef __cplusplus
|
|
|
326 }
|
|
|
327 #endif
|
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|
328
|
|
|
329 #endif /* malloc.h */
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|
|
330 /* Allocate memory on a page boundary.
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|
|
331 Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
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|
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332
|
|
|
333 This library is free software; you can redistribute it and/or
|
|
|
334 modify it under the terms of the GNU Library General Public License as
|
|
|
335 published by the Free Software Foundation; either version 2 of the
|
|
|
336 License, or (at your option) any later version.
|
|
|
337
|
|
|
338 This library is distributed in the hope that it will be useful,
|
|
|
339 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
340 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
341 Library General Public License for more details.
|
|
|
342
|
|
|
343 You should have received a copy of the GNU General Public License
|
|
|
344 along with this library; see the file COPYING. If not, write to
|
|
|
345 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
346 Boston, MA 02111-1307, USA.
|
|
|
347
|
|
|
348 The author may be reached (Email) at the address mike@ai.mit.edu,
|
|
|
349 or (US mail) as Mike Haertel c/o Free Software Foundation, Inc. */
|
|
|
350
|
|
|
351 #if defined (__GNU_LIBRARY__) || defined (_LIBC)
|
|
|
352 #include <stddef.h>
|
|
|
353 #include <sys/cdefs.h>
|
|
100
|
354 #if ! (defined (__GLIBC__) && (__GLIBC__ >= 2))
|
|
0
|
355 extern size_t __getpagesize __P ((void));
|
|
100
|
356 #endif
|
|
0
|
357 #else
|
|
|
358 #include "getpagesize.h"
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|
|
359 #define __getpagesize() getpagesize()
|
|
|
360 #endif
|
|
|
361
|
|
|
362 #ifndef _MALLOC_INTERNAL
|
|
|
363 #define _MALLOC_INTERNAL
|
|
|
364 #include <malloc.h>
|
|
|
365 #endif
|
|
|
366
|
|
|
367 static __malloc_size_t pagesize;
|
|
|
368
|
|
|
369 __ptr_t
|
|
185
|
370 valloc (__malloc_size_t size)
|
|
0
|
371 {
|
|
|
372 if (pagesize == 0)
|
|
|
373 pagesize = __getpagesize ();
|
|
|
374
|
|
|
375 return memalign (pagesize, size);
|
|
|
376 }
|
|
|
377 /* Memory allocator `malloc'.
|
|
|
378 Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation
|
|
|
379 Written May 1989 by Mike Haertel.
|
|
|
380
|
|
|
381 This library is free software; you can redistribute it and/or
|
|
|
382 modify it under the terms of the GNU Library General Public License as
|
|
|
383 published by the Free Software Foundation; either version 2 of the
|
|
|
384 License, or (at your option) any later version.
|
|
|
385
|
|
|
386 This library is distributed in the hope that it will be useful,
|
|
|
387 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
388 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
389 Library General Public License for more details.
|
|
|
390
|
|
|
391 You should have received a copy of the GNU General Public License
|
|
|
392 along with this library; see the file COPYING. If not, write to
|
|
|
393 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
394 Boston, MA 02111-1307, USA.
|
|
|
395
|
|
|
396 The author may be reached (Email) at the address mike@ai.mit.edu,
|
|
|
397 or (US mail) as Mike Haertel c/o Free Software Foundation, Inc. */
|
|
|
398
|
|
|
399 #ifndef _MALLOC_INTERNAL
|
|
|
400 #define _MALLOC_INTERNAL
|
|
|
401 #include <malloc.h>
|
|
|
402 #endif
|
|
|
403
|
|
|
404 /* How to really get more memory. */
|
|
|
405 __ptr_t (*__morecore) __P ((ptrdiff_t __size)) = __default_morecore;
|
|
|
406
|
|
|
407 /* Debugging hook for `malloc'. */
|
|
|
408 __ptr_t (*__malloc_hook) __P ((__malloc_size_t __size));
|
|
|
409
|
|
|
410 /* Pointer to the base of the first block. */
|
|
|
411 char *_heapbase;
|
|
|
412
|
|
|
413 /* Block information table. Allocated with align/__free (not malloc/free). */
|
|
|
414 malloc_info *_heapinfo;
|
|
|
415
|
|
|
416 /* Number of info entries. */
|
|
|
417 static __malloc_size_t heapsize;
|
|
|
418
|
|
|
419 /* Search index in the info table. */
|
|
|
420 __malloc_size_t _heapindex;
|
|
|
421
|
|
|
422 /* Limit of valid info table indices. */
|
|
|
423 __malloc_size_t _heaplimit;
|
|
|
424
|
|
|
425 /* Free lists for each fragment size. */
|
|
|
426 struct list _fraghead[BLOCKLOG];
|
|
|
427
|
|
|
428 /* Instrumentation. */
|
|
|
429 __malloc_size_t _chunks_used;
|
|
|
430 __malloc_size_t _bytes_used;
|
|
|
431 __malloc_size_t _chunks_free;
|
|
|
432 __malloc_size_t _bytes_free;
|
|
|
433
|
|
|
434 /* Are you experienced? */
|
|
88
|
435 static int __malloc_initialized;
|
|
0
|
436
|
|
|
437 void (*__after_morecore_hook) __P ((void));
|
|
|
438
|
|
|
439 /* Aligned allocation. */
|
|
|
440 static __ptr_t align __P ((__malloc_size_t));
|
|
|
441 static __ptr_t
|
|
185
|
442 align (__malloc_size_t size)
|
|
0
|
443 {
|
|
|
444 __ptr_t result;
|
|
|
445 unsigned long int adj;
|
|
|
446
|
|
|
447 result = (*__morecore) (size);
|
|
|
448 adj = (unsigned long int) ((unsigned long int) ((char *) result -
|
|
|
449 (char *) NULL)) % BLOCKSIZE;
|
|
|
450 if (adj != 0)
|
|
|
451 {
|
|
|
452 adj = BLOCKSIZE - adj;
|
|
|
453 (void) (*__morecore) (adj);
|
|
|
454 result = (char *) result + adj;
|
|
|
455 }
|
|
|
456
|
|
|
457 if (__after_morecore_hook)
|
|
|
458 (*__after_morecore_hook) ();
|
|
|
459
|
|
|
460 return result;
|
|
|
461 }
|
|
|
462
|
|
|
463 /* Set everything up and remember that we have. */
|
|
|
464 static int initialize __P ((void));
|
|
|
465 static int
|
|
|
466 initialize ()
|
|
|
467 {
|
|
|
468 heapsize = HEAP / BLOCKSIZE;
|
|
|
469 _heapinfo = (malloc_info *) align (heapsize * sizeof (malloc_info));
|
|
|
470 if (_heapinfo == NULL)
|
|
|
471 return 0;
|
|
|
472 memset (_heapinfo, 0, heapsize * sizeof (malloc_info));
|
|
|
473 _heapinfo[0].free.size = 0;
|
|
|
474 _heapinfo[0].free.next = _heapinfo[0].free.prev = 0;
|
|
|
475 _heapindex = 0;
|
|
|
476 _heapbase = (char *) _heapinfo;
|
|
|
477
|
|
|
478 /* Account for the _heapinfo block itself in the statistics. */
|
|
|
479 _bytes_used = heapsize * sizeof (malloc_info);
|
|
|
480 _chunks_used = 1;
|
|
|
481
|
|
|
482 __malloc_initialized = 1;
|
|
|
483 return 1;
|
|
|
484 }
|
|
|
485
|
|
|
486 /* Get neatly aligned memory, initializing or
|
|
|
487 growing the heap info table as necessary. */
|
|
|
488 static __ptr_t morecore __P ((__malloc_size_t));
|
|
|
489 static __ptr_t
|
|
185
|
490 morecore (__malloc_size_t size)
|
|
0
|
491 {
|
|
|
492 __ptr_t result;
|
|
|
493 malloc_info *newinfo, *oldinfo;
|
|
|
494 __malloc_size_t newsize;
|
|
|
495
|
|
|
496 result = align (size);
|
|
|
497 if (result == NULL)
|
|
|
498 return NULL;
|
|
|
499
|
|
|
500 /* Check if we need to grow the info table. */
|
|
|
501 if ((__malloc_size_t) BLOCK ((char *) result + size) > heapsize)
|
|
|
502 {
|
|
|
503 newsize = heapsize;
|
|
|
504 while ((__malloc_size_t) BLOCK ((char *) result + size) > newsize)
|
|
|
505 newsize *= 2;
|
|
|
506 newinfo = (malloc_info *) align (newsize * sizeof (malloc_info));
|
|
|
507 if (newinfo == NULL)
|
|
|
508 {
|
|
|
509 (*__morecore) (-size);
|
|
|
510 return NULL;
|
|
|
511 }
|
|
|
512 memcpy (newinfo, _heapinfo, heapsize * sizeof (malloc_info));
|
|
|
513 memset (&newinfo[heapsize], 0,
|
|
|
514 (newsize - heapsize) * sizeof (malloc_info));
|
|
|
515 oldinfo = _heapinfo;
|
|
|
516 newinfo[BLOCK (oldinfo)].busy.type = 0;
|
|
|
517 newinfo[BLOCK (oldinfo)].busy.info.size
|
|
|
518 = BLOCKIFY (heapsize * sizeof (malloc_info));
|
|
|
519 _heapinfo = newinfo;
|
|
|
520 /* Account for the _heapinfo block itself in the statistics. */
|
|
|
521 _bytes_used += newsize * sizeof (malloc_info);
|
|
|
522 ++_chunks_used;
|
|
|
523 _free_internal (oldinfo);
|
|
|
524 heapsize = newsize;
|
|
|
525 }
|
|
|
526
|
|
|
527 _heaplimit = BLOCK ((char *) result + size);
|
|
|
528 return result;
|
|
|
529 }
|
|
|
530
|
|
|
531 /* Allocate memory from the heap. */
|
|
|
532 __ptr_t
|
|
185
|
533 malloc (__malloc_size_t size)
|
|
0
|
534 {
|
|
|
535 __ptr_t result;
|
|
|
536 __malloc_size_t block, blocks, lastblocks, start;
|
|
|
537 __malloc_size_t i;
|
|
|
538 struct list *next;
|
|
|
539
|
|
|
540 /* ANSI C allows `malloc (0)' to either return NULL, or to return a
|
|
|
541 valid address you can realloc and free (though not dereference).
|
|
|
542
|
|
|
543 It turns out that some extant code (sunrpc, at least Ultrix's version)
|
|
|
544 expects `malloc (0)' to return non-NULL and breaks otherwise.
|
|
|
545 Be compatible. */
|
|
|
546
|
|
|
547 #ifdef HAVE_X_WINDOWS
|
|
|
548 /* there is at least one Xt bug where calloc(n,x) is blindly called
|
|
|
549 where n can be 0, and yet if 0 is returned, Xt barfs */
|
|
|
550 if (size == 0)
|
|
|
551 size = sizeof (struct list);
|
|
|
552 #else
|
|
|
553 if (size == 0)
|
|
|
554 return NULL;
|
|
|
555 #endif
|
|
|
556
|
|
88
|
557 if (__malloc_hook != NULL)
|
|
|
558 return (*__malloc_hook) (size);
|
|
|
559
|
|
0
|
560 if (!__malloc_initialized)
|
|
|
561 if (!initialize ())
|
|
|
562 return NULL;
|
|
|
563
|
|
|
564 #ifdef SUNOS_LOCALTIME_BUG
|
|
|
565 /* Workaround for localtime() allocating 8 bytes and writing 9 bug... */
|
|
|
566 if (size < 16)
|
|
|
567 size = 16;
|
|
|
568 #endif
|
|
|
569
|
|
|
570 if (size < sizeof (struct list))
|
|
|
571 size = sizeof (struct list);
|
|
|
572
|
|
|
573 /* Determine the allocation policy based on the request size. */
|
|
|
574 if (size <= BLOCKSIZE / 2)
|
|
|
575 {
|
|
|
576 /* Small allocation to receive a fragment of a block.
|
|
|
577 Determine the logarithm to base two of the fragment size. */
|
|
|
578 __malloc_size_t log = 1;
|
|
|
579 --size;
|
|
|
580 while ((size /= 2) != 0)
|
|
|
581 ++log;
|
|
|
582
|
|
|
583 /* Look in the fragment lists for a
|
|
|
584 free fragment of the desired size. */
|
|
|
585 next = _fraghead[log].next;
|
|
|
586 if (next != NULL)
|
|
|
587 {
|
|
|
588 /* There are free fragments of this size.
|
|
|
589 Pop a fragment out of the fragment list and return it.
|
|
|
590 Update the block's nfree and first counters. */
|
|
|
591 result = (__ptr_t) next;
|
|
|
592 next->prev->next = next->next;
|
|
|
593 if (next->next != NULL)
|
|
|
594 next->next->prev = next->prev;
|
|
|
595 block = BLOCK (result);
|
|
|
596 if (--_heapinfo[block].busy.info.frag.nfree != 0)
|
|
|
597 _heapinfo[block].busy.info.frag.first = (unsigned long int)
|
|
|
598 ((unsigned long int) ((char *) next->next - (char *) NULL)
|
|
|
599 % BLOCKSIZE) >> log;
|
|
|
600
|
|
|
601 /* Update the statistics. */
|
|
|
602 ++_chunks_used;
|
|
|
603 _bytes_used += 1 << log;
|
|
|
604 --_chunks_free;
|
|
|
605 _bytes_free -= 1 << log;
|
|
|
606 }
|
|
|
607 else
|
|
|
608 {
|
|
|
609 /* No free fragments of the desired size, so get a new block
|
|
|
610 and break it into fragments, returning the first. */
|
|
|
611 result = malloc (BLOCKSIZE);
|
|
|
612 if (result == NULL)
|
|
|
613 return NULL;
|
|
|
614
|
|
|
615 /* Link all fragments but the first into the free list. */
|
|
|
616 for (i = 1; i < (__malloc_size_t) (BLOCKSIZE >> log); ++i)
|
|
|
617 {
|
|
|
618 next = (struct list *) ((char *) result + (i << log));
|
|
|
619 next->next = _fraghead[log].next;
|
|
|
620 next->prev = &_fraghead[log];
|
|
|
621 next->prev->next = next;
|
|
|
622 if (next->next != NULL)
|
|
|
623 next->next->prev = next;
|
|
|
624 }
|
|
|
625
|
|
|
626 /* Initialize the nfree and first counters for this block. */
|
|
|
627 block = BLOCK (result);
|
|
|
628 _heapinfo[block].busy.type = log;
|
|
|
629 _heapinfo[block].busy.info.frag.nfree = i - 1;
|
|
|
630 _heapinfo[block].busy.info.frag.first = i - 1;
|
|
|
631
|
|
|
632 _chunks_free += (BLOCKSIZE >> log) - 1;
|
|
|
633 _bytes_free += BLOCKSIZE - (1 << log);
|
|
|
634 _bytes_used -= BLOCKSIZE - (1 << log);
|
|
|
635 }
|
|
|
636 }
|
|
|
637 else
|
|
|
638 {
|
|
|
639 /* Large allocation to receive one or more blocks.
|
|
|
640 Search the free list in a circle starting at the last place visited.
|
|
|
641 If we loop completely around without finding a large enough
|
|
|
642 space we will have to get more memory from the system. */
|
|
|
643 blocks = BLOCKIFY (size);
|
|
|
644 start = block = _heapindex;
|
|
|
645 while (_heapinfo[block].free.size < blocks)
|
|
|
646 {
|
|
|
647 block = _heapinfo[block].free.next;
|
|
|
648 if (block == start)
|
|
|
649 {
|
|
|
650 /* Need to get more from the system. Check to see if
|
|
|
651 the new core will be contiguous with the final free
|
|
|
652 block; if so we don't need to get as much. */
|
|
|
653 block = _heapinfo[0].free.prev;
|
|
|
654 lastblocks = _heapinfo[block].free.size;
|
|
|
655 if (_heaplimit != 0 && block + lastblocks == _heaplimit &&
|
|
|
656 (*__morecore) (0) == ADDRESS (block + lastblocks) &&
|
|
|
657 (morecore ((blocks - lastblocks) * BLOCKSIZE)) != NULL)
|
|
|
658 {
|
|
|
659 /* Which block we are extending (the `final free
|
|
|
660 block' referred to above) might have changed, if
|
|
|
661 it got combined with a freed info table. */
|
|
|
662 block = _heapinfo[0].free.prev;
|
|
|
663 _heapinfo[block].free.size += (blocks - lastblocks);
|
|
|
664 _bytes_free += (blocks - lastblocks) * BLOCKSIZE;
|
|
|
665 continue;
|
|
|
666 }
|
|
|
667 result = morecore (blocks * BLOCKSIZE);
|
|
|
668 if (result == NULL)
|
|
|
669 return NULL;
|
|
|
670 block = BLOCK (result);
|
|
|
671 _heapinfo[block].busy.type = 0;
|
|
|
672 _heapinfo[block].busy.info.size = blocks;
|
|
|
673 ++_chunks_used;
|
|
|
674 _bytes_used += blocks * BLOCKSIZE;
|
|
|
675 return result;
|
|
|
676 }
|
|
|
677 }
|
|
|
678
|
|
|
679 /* At this point we have found a suitable free list entry.
|
|
|
680 Figure out how to remove what we need from the list. */
|
|
|
681 result = ADDRESS (block);
|
|
|
682 if (_heapinfo[block].free.size > blocks)
|
|
|
683 {
|
|
|
684 /* The block we found has a bit left over,
|
|
|
685 so relink the tail end back into the free list. */
|
|
|
686 _heapinfo[block + blocks].free.size
|
|
|
687 = _heapinfo[block].free.size - blocks;
|
|
|
688 _heapinfo[block + blocks].free.next
|
|
|
689 = _heapinfo[block].free.next;
|
|
|
690 _heapinfo[block + blocks].free.prev
|
|
|
691 = _heapinfo[block].free.prev;
|
|
|
692 _heapinfo[_heapinfo[block].free.prev].free.next
|
|
|
693 = _heapinfo[_heapinfo[block].free.next].free.prev
|
|
|
694 = _heapindex = block + blocks;
|
|
|
695 }
|
|
|
696 else
|
|
|
697 {
|
|
|
698 /* The block exactly matches our requirements,
|
|
|
699 so just remove it from the list. */
|
|
|
700 _heapinfo[_heapinfo[block].free.next].free.prev
|
|
|
701 = _heapinfo[block].free.prev;
|
|
|
702 _heapinfo[_heapinfo[block].free.prev].free.next
|
|
|
703 = _heapindex = _heapinfo[block].free.next;
|
|
|
704 --_chunks_free;
|
|
|
705 }
|
|
|
706
|
|
|
707 _heapinfo[block].busy.type = 0;
|
|
|
708 _heapinfo[block].busy.info.size = blocks;
|
|
|
709 ++_chunks_used;
|
|
|
710 _bytes_used += blocks * BLOCKSIZE;
|
|
|
711 _bytes_free -= blocks * BLOCKSIZE;
|
|
|
712 }
|
|
|
713
|
|
|
714 return result;
|
|
|
715 }
|
|
|
716
|
|
|
717 #ifndef _LIBC
|
|
|
718
|
|
|
719 /* On some ANSI C systems, some libc functions call _malloc, _free
|
|
|
720 and _realloc. Make them use the GNU functions. */
|
|
|
721
|
|
|
722 __ptr_t _malloc (__malloc_size_t size);
|
|
|
723 __ptr_t
|
|
|
724 _malloc (__malloc_size_t size)
|
|
|
725 {
|
|
|
726 return malloc (size);
|
|
|
727 }
|
|
|
728
|
|
|
729 void _free (__ptr_t ptr);
|
|
|
730 void
|
|
|
731 _free (__ptr_t ptr)
|
|
|
732 {
|
|
|
733 free (ptr);
|
|
|
734 }
|
|
|
735
|
|
|
736 __ptr_t _realloc (__ptr_t ptr, __malloc_size_t size);
|
|
|
737 __ptr_t
|
|
|
738 _realloc (__ptr_t ptr, __malloc_size_t size)
|
|
|
739 {
|
|
|
740 return realloc (ptr, size);
|
|
|
741 }
|
|
|
742
|
|
|
743 #endif
|
|
|
744 /* Free a block of memory allocated by `malloc'.
|
|
|
745 Copyright 1990, 1991, 1992, 1994 Free Software Foundation
|
|
|
746 Written May 1989 by Mike Haertel.
|
|
|
747
|
|
|
748 This library is free software; you can redistribute it and/or
|
|
|
749 modify it under the terms of the GNU Library General Public License as
|
|
|
750 published by the Free Software Foundation; either version 2 of the
|
|
|
751 License, or (at your option) any later version.
|
|
|
752
|
|
|
753 This library is distributed in the hope that it will be useful,
|
|
|
754 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
755 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
756 Library General Public License for more details.
|
|
|
757
|
|
|
758 You should have received a copy of the GNU General Public License
|
|
|
759 along with this library; see the file COPYING. If not, write to
|
|
|
760 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
761 Boston, MA 02111-1307, USA.
|
|
|
762
|
|
|
763 The author may be reached (Email) at the address mike@ai.mit.edu,
|
|
|
764 or (US mail) as Mike Haertel c/o Free Software Foundation, Inc. */
|
|
|
765
|
|
|
766 #ifndef _MALLOC_INTERNAL
|
|
|
767 #define _MALLOC_INTERNAL
|
|
|
768 #include <malloc.h>
|
|
|
769 #endif
|
|
|
770
|
|
|
771 /* Debugging hook for free. */
|
|
|
772 void (*__free_hook) __P ((__ptr_t __ptr));
|
|
|
773
|
|
|
774 /* List of blocks allocated by memalign. */
|
|
|
775 struct alignlist *_aligned_blocks = NULL;
|
|
|
776
|
|
|
777 /* Return memory to the heap.
|
|
|
778 Like `free' but don't call a __free_hook if there is one. */
|
|
|
779 void
|
|
185
|
780 _free_internal (__ptr_t ptr)
|
|
0
|
781 {
|
|
|
782 int type;
|
|
|
783 __malloc_size_t block, blocks;
|
|
|
784 __malloc_size_t i;
|
|
|
785 struct list *prev, *next;
|
|
|
786
|
|
|
787 block = BLOCK (ptr);
|
|
|
788
|
|
|
789 type = _heapinfo[block].busy.type;
|
|
|
790 switch (type)
|
|
|
791 {
|
|
|
792 case 0:
|
|
|
793 /* Get as many statistics as early as we can. */
|
|
|
794 --_chunks_used;
|
|
|
795 _bytes_used -= _heapinfo[block].busy.info.size * BLOCKSIZE;
|
|
|
796 _bytes_free += _heapinfo[block].busy.info.size * BLOCKSIZE;
|
|
|
797
|
|
|
798 /* Find the free cluster previous to this one in the free list.
|
|
|
799 Start searching at the last block referenced; this may benefit
|
|
|
800 programs with locality of allocation. */
|
|
|
801 i = _heapindex;
|
|
|
802 if (i > block)
|
|
|
803 while (i > block)
|
|
|
804 i = _heapinfo[i].free.prev;
|
|
|
805 else
|
|
|
806 {
|
|
|
807 do
|
|
|
808 i = _heapinfo[i].free.next;
|
|
|
809 while (i > 0 && i < block);
|
|
|
810 i = _heapinfo[i].free.prev;
|
|
|
811 }
|
|
|
812
|
|
|
813 /* Determine how to link this block into the free list. */
|
|
|
814 if (block == i + _heapinfo[i].free.size)
|
|
|
815 {
|
|
|
816 /* Coalesce this block with its predecessor. */
|
|
|
817 _heapinfo[i].free.size += _heapinfo[block].busy.info.size;
|
|
|
818 block = i;
|
|
|
819 }
|
|
|
820 else
|
|
|
821 {
|
|
|
822 /* Really link this block back into the free list. */
|
|
|
823 _heapinfo[block].free.size = _heapinfo[block].busy.info.size;
|
|
|
824 _heapinfo[block].free.next = _heapinfo[i].free.next;
|
|
|
825 _heapinfo[block].free.prev = i;
|
|
|
826 _heapinfo[i].free.next = block;
|
|
|
827 _heapinfo[_heapinfo[block].free.next].free.prev = block;
|
|
|
828 ++_chunks_free;
|
|
|
829 }
|
|
|
830
|
|
|
831 /* Now that the block is linked in, see if we can coalesce it
|
|
|
832 with its successor (by deleting its successor from the list
|
|
|
833 and adding in its size). */
|
|
|
834 if (block + _heapinfo[block].free.size == _heapinfo[block].free.next)
|
|
|
835 {
|
|
|
836 _heapinfo[block].free.size
|
|
|
837 += _heapinfo[_heapinfo[block].free.next].free.size;
|
|
|
838 _heapinfo[block].free.next
|
|
|
839 = _heapinfo[_heapinfo[block].free.next].free.next;
|
|
|
840 _heapinfo[_heapinfo[block].free.next].free.prev = block;
|
|
|
841 --_chunks_free;
|
|
|
842 }
|
|
|
843
|
|
|
844 /* Now see if we can return stuff to the system. */
|
|
|
845 blocks = _heapinfo[block].free.size;
|
|
|
846 if (blocks >= FINAL_FREE_BLOCKS && block + blocks == _heaplimit
|
|
|
847 && (*__morecore) (0) == ADDRESS (block + blocks))
|
|
|
848 {
|
|
|
849 __malloc_size_t bytes = blocks * BLOCKSIZE;
|
|
|
850 _heaplimit -= blocks;
|
|
|
851 (*__morecore) (-bytes);
|
|
|
852 _heapinfo[_heapinfo[block].free.prev].free.next
|
|
|
853 = _heapinfo[block].free.next;
|
|
|
854 _heapinfo[_heapinfo[block].free.next].free.prev
|
|
|
855 = _heapinfo[block].free.prev;
|
|
|
856 block = _heapinfo[block].free.prev;
|
|
|
857 --_chunks_free;
|
|
|
858 _bytes_free -= bytes;
|
|
|
859 }
|
|
|
860
|
|
|
861 /* Set the next search to begin at this block. */
|
|
|
862 _heapindex = block;
|
|
|
863 break;
|
|
|
864
|
|
|
865 default:
|
|
|
866 /* Do some of the statistics. */
|
|
|
867 --_chunks_used;
|
|
|
868 _bytes_used -= 1 << type;
|
|
|
869 ++_chunks_free;
|
|
|
870 _bytes_free += 1 << type;
|
|
|
871
|
|
|
872 /* Get the address of the first free fragment in this block. */
|
|
|
873 prev = (struct list *) ((char *) ADDRESS (block) +
|
|
|
874 (_heapinfo[block].busy.info.frag.first << type));
|
|
|
875
|
|
|
876 if (_heapinfo[block].busy.info.frag.nfree == (BLOCKSIZE >> type) - 1)
|
|
|
877 {
|
|
|
878 /* If all fragments of this block are free, remove them
|
|
|
879 from the fragment list and free the whole block. */
|
|
|
880 next = prev;
|
|
|
881 for (i = 1; i < (__malloc_size_t) (BLOCKSIZE >> type); ++i)
|
|
|
882 next = next->next;
|
|
|
883 prev->prev->next = next;
|
|
|
884 if (next != NULL)
|
|
|
885 next->prev = prev->prev;
|
|
|
886 _heapinfo[block].busy.type = 0;
|
|
|
887 _heapinfo[block].busy.info.size = 1;
|
|
|
888
|
|
|
889 /* Keep the statistics accurate. */
|
|
|
890 ++_chunks_used;
|
|
|
891 _bytes_used += BLOCKSIZE;
|
|
|
892 _chunks_free -= BLOCKSIZE >> type;
|
|
|
893 _bytes_free -= BLOCKSIZE;
|
|
|
894
|
|
|
895 free (ADDRESS (block));
|
|
|
896 }
|
|
|
897 else if (_heapinfo[block].busy.info.frag.nfree != 0)
|
|
|
898 {
|
|
|
899 /* If some fragments of this block are free, link this
|
|
|
900 fragment into the fragment list after the first free
|
|
|
901 fragment of this block. */
|
|
|
902 next = (struct list *) ptr;
|
|
|
903 next->next = prev->next;
|
|
|
904 next->prev = prev;
|
|
|
905 prev->next = next;
|
|
|
906 if (next->next != NULL)
|
|
|
907 next->next->prev = next;
|
|
|
908 ++_heapinfo[block].busy.info.frag.nfree;
|
|
|
909 }
|
|
|
910 else
|
|
|
911 {
|
|
|
912 /* No fragments of this block are free, so link this
|
|
|
913 fragment into the fragment list and announce that
|
|
|
914 it is the first free fragment of this block. */
|
|
|
915 prev = (struct list *) ptr;
|
|
|
916 _heapinfo[block].busy.info.frag.nfree = 1;
|
|
|
917 _heapinfo[block].busy.info.frag.first = (unsigned long int)
|
|
|
918 ((unsigned long int) ((char *) ptr - (char *) NULL)
|
|
|
919 % BLOCKSIZE >> type);
|
|
|
920 prev->next = _fraghead[type].next;
|
|
|
921 prev->prev = &_fraghead[type];
|
|
|
922 prev->prev->next = prev;
|
|
|
923 if (prev->next != NULL)
|
|
|
924 prev->next->prev = prev;
|
|
|
925 }
|
|
|
926 break;
|
|
|
927 }
|
|
|
928 }
|
|
|
929
|
|
|
930 /* Return memory to the heap. */
|
|
|
931 __free_ret_t
|
|
185
|
932 free (__ptr_t ptr)
|
|
0
|
933 {
|
|
|
934 struct alignlist *l;
|
|
|
935
|
|
|
936 if (ptr == NULL)
|
|
|
937 return;
|
|
|
938
|
|
|
939 for (l = _aligned_blocks; l != NULL; l = l->next)
|
|
|
940 if (l->aligned == ptr)
|
|
|
941 {
|
|
|
942 l->aligned = NULL; /* Mark the slot in the list as free. */
|
|
|
943 ptr = l->exact;
|
|
|
944 break;
|
|
|
945 }
|
|
|
946
|
|
|
947 if (__free_hook != NULL)
|
|
|
948 (*__free_hook) (ptr);
|
|
|
949 else
|
|
|
950 _free_internal (ptr);
|
|
|
951 }
|
|
|
952 /* Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc.
|
|
|
953 This file is part of the GNU C Library.
|
|
|
954
|
|
|
955 The GNU C Library is free software; you can redistribute it and/or
|
|
|
956 modify it under the terms of the GNU Library General Public License as
|
|
|
957 published by the Free Software Foundation; either version 2 of the
|
|
|
958 License, or (at your option) any later version.
|
|
|
959
|
|
|
960 The GNU C Library is distributed in the hope that it will be useful,
|
|
|
961 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
962 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
963 Library General Public License for more details.
|
|
|
964
|
|
|
965 You should have received a copy of the GNU General Public License
|
|
|
966 along with this library; see the file COPYING. If not, write to
|
|
|
967 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
968 Boston, MA 02111-1307, USA. */
|
|
|
969
|
|
|
970 #ifndef _MALLOC_INTERNAL
|
|
|
971 #define _MALLOC_INTERNAL
|
|
|
972 #include <malloc.h>
|
|
|
973 #endif
|
|
|
974
|
|
|
975 #ifdef _LIBC
|
|
|
976
|
|
|
977 #include <ansidecl.h>
|
|
|
978 #include <gnu-stabs.h>
|
|
|
979
|
|
|
980 #undef cfree
|
|
|
981
|
|
|
982 function_alias(cfree, free, void, (ptr),
|
|
|
983 DEFUN(cfree, (ptr), PTR ptr))
|
|
|
984
|
|
|
985 #else
|
|
|
986
|
|
|
987 void cfree (__ptr_t ptr);
|
|
|
988 void
|
|
|
989 cfree (__ptr_t ptr)
|
|
|
990 {
|
|
|
991 free (ptr);
|
|
|
992 }
|
|
|
993
|
|
|
994 #endif
|
|
|
995 /* Change the size of a block allocated by `malloc'.
|
|
|
996 Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
|
|
|
997 Written May 1989 by Mike Haertel.
|
|
|
998
|
|
|
999 This library is free software; you can redistribute it and/or
|
|
|
1000 modify it under the terms of the GNU Library General Public License as
|
|
|
1001 published by the Free Software Foundation; either version 2 of the
|
|
|
1002 License, or (at your option) any later version.
|
|
|
1003
|
|
|
1004 This library is distributed in the hope that it will be useful,
|
|
|
1005 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
1006 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
1007 Library General Public License for more details.
|
|
|
1008
|
|
|
1009 You should have received a copy of the GNU General Public License
|
|
|
1010 along with this library; see the file COPYING. If not, write to
|
|
|
1011 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
1012 Boston, MA 02111-1307, USA.
|
|
|
1013
|
|
|
1014 The author may be reached (Email) at the address mike@ai.mit.edu,
|
|
|
1015 or (US mail) as Mike Haertel c/o Free Software Foundation, Inc. */
|
|
|
1016
|
|
|
1017 #ifndef _MALLOC_INTERNAL
|
|
|
1018 #define _MALLOC_INTERNAL
|
|
|
1019 #include <malloc.h>
|
|
|
1020 #endif
|
|
|
1021
|
|
|
1022 #if 0 /* FSFmacs */
|
|
|
1023 /* XEmacs requires an ANSI compiler, and memmove() is part of the ANSI-
|
|
|
1024 mandated functions. For losing systems like SunOS 4, we provide
|
|
|
1025 our own memmove(). */
|
|
|
1026
|
|
|
1027 #if (defined (MEMMOVE_MISSING) || \
|
|
|
1028 !defined(_LIBC) && !defined(STDC_HEADERS) && !defined(USG))
|
|
|
1029
|
|
|
1030 /* Snarfed directly from Emacs src/dispnew.c:
|
|
|
1031 XXX Should use system bcopy if it handles overlap. */
|
|
|
1032 #ifndef emacs
|
|
|
1033
|
|
|
1034 /* Like bcopy except never gets confused by overlap. */
|
|
|
1035
|
|
|
1036 static void
|
|
185
|
1037 safe_bcopy (char *from, char *to, int size)
|
|
0
|
1038 {
|
|
|
1039 if (size <= 0 || from == to)
|
|
|
1040 return;
|
|
|
1041
|
|
|
1042 /* If the source and destination don't overlap, then bcopy can
|
|
|
1043 handle it. If they do overlap, but the destination is lower in
|
|
|
1044 memory than the source, we'll assume bcopy can handle that. */
|
|
|
1045 if (to < from || from + size <= to)
|
|
|
1046 bcopy (from, to, size);
|
|
|
1047
|
|
|
1048 /* Otherwise, we'll copy from the end. */
|
|
|
1049 else
|
|
|
1050 {
|
|
|
1051 char *endf = from + size;
|
|
|
1052 char *endt = to + size;
|
|
|
1053
|
|
|
1054 /* If TO - FROM is large, then we should break the copy into
|
|
|
1055 nonoverlapping chunks of TO - FROM bytes each. However, if
|
|
|
1056 TO - FROM is small, then the bcopy function call overhead
|
|
|
1057 makes this not worth it. The crossover point could be about
|
|
|
1058 anywhere. Since I don't think the obvious copy loop is too
|
|
|
1059 bad, I'm trying to err in its favor. */
|
|
|
1060 if (to - from < 64)
|
|
|
1061 {
|
|
|
1062 do
|
|
|
1063 *--endt = *--endf;
|
|
|
1064 while (endf != from);
|
|
|
1065 }
|
|
|
1066 else
|
|
|
1067 {
|
|
|
1068 for (;;)
|
|
|
1069 {
|
|
|
1070 endt -= (to - from);
|
|
|
1071 endf -= (to - from);
|
|
|
1072
|
|
|
1073 if (endt < to)
|
|
|
1074 break;
|
|
|
1075
|
|
|
1076 bcopy (endf, endt, to - from);
|
|
|
1077 }
|
|
|
1078
|
|
|
1079 /* If SIZE wasn't a multiple of TO - FROM, there will be a
|
|
|
1080 little left over. The amount left over is
|
|
|
1081 (endt + (to - from)) - to, which is endt - from. */
|
|
|
1082 bcopy (from, to, endt - from);
|
|
|
1083 }
|
|
|
1084 }
|
|
185
|
1085 }
|
|
0
|
1086 #endif /* Not emacs. */
|
|
|
1087
|
|
|
1088 #define memmove(to, from, size) safe_bcopy ((from), (to), (size))
|
|
|
1089
|
|
|
1090 #endif
|
|
|
1091
|
|
|
1092 #endif /* FSFmacs */
|
|
|
1093
|
|
|
1094
|
|
|
1095 #ifndef min
|
|
|
1096 #define min(A, B) ((A) < (B) ? (A) : (B))
|
|
|
1097 #endif
|
|
|
1098
|
|
|
1099 /* Debugging hook for realloc. */
|
|
|
1100 __ptr_t (*__realloc_hook) __P ((__ptr_t __ptr, __malloc_size_t __size));
|
|
|
1101
|
|
|
1102 /* Resize the given region to the new size, returning a pointer
|
|
|
1103 to the (possibly moved) region. This is optimized for speed;
|
|
|
1104 some benchmarks seem to indicate that greater compactness is
|
|
|
1105 achieved by unconditionally allocating and copying to a
|
|
|
1106 new region. This module has incestuous knowledge of the
|
|
|
1107 internals of both free and malloc. */
|
|
|
1108 __ptr_t
|
|
185
|
1109 realloc (__ptr_t ptr, __malloc_size_t size)
|
|
0
|
1110 {
|
|
|
1111 __ptr_t result;
|
|
|
1112 int type;
|
|
|
1113 __malloc_size_t block, blocks, oldlimit;
|
|
|
1114
|
|
|
1115 if (size == 0)
|
|
|
1116 {
|
|
|
1117 free (ptr);
|
|
|
1118 return malloc (0);
|
|
|
1119 }
|
|
|
1120 else if (ptr == NULL)
|
|
|
1121 return malloc (size);
|
|
|
1122
|
|
|
1123 if (__realloc_hook != NULL)
|
|
|
1124 return (*__realloc_hook) (ptr, size);
|
|
|
1125
|
|
|
1126 block = BLOCK (ptr);
|
|
|
1127
|
|
|
1128 type = _heapinfo[block].busy.type;
|
|
|
1129 switch (type)
|
|
|
1130 {
|
|
|
1131 case 0:
|
|
|
1132 /* Maybe reallocate a large block to a small fragment. */
|
|
|
1133 if (size <= BLOCKSIZE / 2)
|
|
|
1134 {
|
|
|
1135 result = malloc (size);
|
|
|
1136 if (result != NULL)
|
|
|
1137 {
|
|
|
1138 memcpy (result, ptr, size);
|
|
|
1139 _free_internal (ptr);
|
|
|
1140 return result;
|
|
|
1141 }
|
|
|
1142 }
|
|
|
1143
|
|
|
1144 /* The new size is a large allocation as well;
|
|
|
1145 see if we can hold it in place. */
|
|
|
1146 blocks = BLOCKIFY (size);
|
|
|
1147 if (blocks < _heapinfo[block].busy.info.size)
|
|
|
1148 {
|
|
|
1149 /* The new size is smaller; return
|
|
|
1150 excess memory to the free list. */
|
|
|
1151 _heapinfo[block + blocks].busy.type = 0;
|
|
|
1152 _heapinfo[block + blocks].busy.info.size
|
|
|
1153 = _heapinfo[block].busy.info.size - blocks;
|
|
|
1154 _heapinfo[block].busy.info.size = blocks;
|
|
|
1155 /* We have just created a new chunk by splitting a chunk in two.
|
|
|
1156 Now we will free this chunk; increment the statistics counter
|
|
|
1157 so it doesn't become wrong when _free_internal decrements it. */
|
|
|
1158 ++_chunks_used;
|
|
|
1159 _free_internal (ADDRESS (block + blocks));
|
|
|
1160 result = ptr;
|
|
|
1161 }
|
|
|
1162 else if (blocks == _heapinfo[block].busy.info.size)
|
|
|
1163 /* No size change necessary. */
|
|
|
1164 result = ptr;
|
|
|
1165 else
|
|
|
1166 {
|
|
|
1167 /* Won't fit, so allocate a new region that will.
|
|
|
1168 Free the old region first in case there is sufficient
|
|
|
1169 adjacent free space to grow without moving. */
|
|
|
1170 blocks = _heapinfo[block].busy.info.size;
|
|
|
1171 /* Prevent free from actually returning memory to the system. */
|
|
|
1172 oldlimit = _heaplimit;
|
|
|
1173 _heaplimit = 0;
|
|
|
1174 free (ptr);
|
|
|
1175 _heaplimit = oldlimit;
|
|
|
1176 result = malloc (size);
|
|
|
1177 if (result == NULL)
|
|
|
1178 {
|
|
|
1179 /* Now we're really in trouble. We have to unfree
|
|
|
1180 the thing we just freed. Unfortunately it might
|
|
|
1181 have been coalesced with its neighbors. */
|
|
|
1182 if (_heapindex == block)
|
|
|
1183 (void) malloc (blocks * BLOCKSIZE);
|
|
|
1184 else
|
|
|
1185 {
|
|
|
1186 __ptr_t previous = malloc ((block - _heapindex) * BLOCKSIZE);
|
|
|
1187 (void) malloc (blocks * BLOCKSIZE);
|
|
|
1188 free (previous);
|
|
|
1189 }
|
|
|
1190 return NULL;
|
|
|
1191 }
|
|
|
1192 if (ptr != result)
|
|
|
1193 memmove (result, ptr, blocks * BLOCKSIZE);
|
|
|
1194 }
|
|
|
1195 break;
|
|
|
1196
|
|
|
1197 default:
|
|
|
1198 /* Old size is a fragment; type is logarithm
|
|
|
1199 to base two of the fragment size. */
|
|
|
1200 if (size > (__malloc_size_t) (1 << (type - 1)) &&
|
|
|
1201 size <= (__malloc_size_t) (1 << type))
|
|
|
1202 /* The new size is the same kind of fragment. */
|
|
|
1203 result = ptr;
|
|
|
1204 else
|
|
|
1205 {
|
|
|
1206 /* The new size is different; allocate a new space,
|
|
|
1207 and copy the lesser of the new size and the old. */
|
|
|
1208 result = malloc (size);
|
|
|
1209 if (result == NULL)
|
|
|
1210 return NULL;
|
|
|
1211 memcpy (result, ptr, min (size, (__malloc_size_t) 1 << type));
|
|
|
1212 free (ptr);
|
|
|
1213 }
|
|
|
1214 break;
|
|
|
1215 }
|
|
|
1216
|
|
|
1217 return result;
|
|
|
1218 }
|
|
|
1219 /* Copyright (C) 1991, 1992, 1994 Free Software Foundation, Inc.
|
|
|
1220
|
|
|
1221 This library is free software; you can redistribute it and/or
|
|
|
1222 modify it under the terms of the GNU Library General Public License as
|
|
|
1223 published by the Free Software Foundation; either version 2 of the
|
|
|
1224 License, or (at your option) any later version.
|
|
|
1225
|
|
|
1226 This library is distributed in the hope that it will be useful,
|
|
|
1227 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
1228 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
1229 Library General Public License for more details.
|
|
|
1230
|
|
|
1231 You should have received a copy of the GNU General Public License
|
|
|
1232 along with this library; see the file COPYING. If not, write to
|
|
|
1233 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
1234 Boston, MA 02111-1307, USA.
|
|
|
1235
|
|
|
1236 The author may be reached (Email) at the address mike@ai.mit.edu,
|
|
|
1237 or (US mail) as Mike Haertel c/o Free Software Foundation, Inc. */
|
|
|
1238
|
|
|
1239 #ifndef _MALLOC_INTERNAL
|
|
|
1240 #define _MALLOC_INTERNAL
|
|
|
1241 #include <malloc.h>
|
|
|
1242 #endif
|
|
|
1243
|
|
|
1244 /* Allocate an array of NMEMB elements each SIZE bytes long.
|
|
|
1245 The entire array is initialized to zeros. */
|
|
|
1246 __ptr_t
|
|
185
|
1247 calloc (__malloc_size_t nmemb, __malloc_size_t size)
|
|
0
|
1248 {
|
|
|
1249 __ptr_t result = malloc (nmemb * size);
|
|
|
1250
|
|
|
1251 if (result != NULL)
|
|
|
1252 (void) memset (result, 0, nmemb * size);
|
|
|
1253
|
|
|
1254 return result;
|
|
|
1255 }
|
|
|
1256 /* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
|
|
|
1257 This file is part of the GNU C Library.
|
|
|
1258
|
|
|
1259 The GNU C Library is free software; you can redistribute it and/or modify
|
|
|
1260 it under the terms of the GNU General Public License as published by
|
|
|
1261 the Free Software Foundation; either version 2, or (at your option)
|
|
|
1262 any later version.
|
|
|
1263
|
|
|
1264 The GNU C Library is distributed in the hope that it will be useful,
|
|
|
1265 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
1266 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
1267 GNU General Public License for more details.
|
|
|
1268
|
|
|
1269 You should have received a copy of the GNU General Public License
|
|
|
1270 along with the GNU C Library; see the file COPYING. If not, write to
|
|
|
1271 the Free the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
1272 Boston, MA 02111-1307, USA. */
|
|
|
1273
|
|
|
1274 #ifndef _MALLOC_INTERNAL
|
|
|
1275 #define _MALLOC_INTERNAL
|
|
|
1276 #include <malloc.h>
|
|
|
1277 #endif
|
|
|
1278
|
|
|
1279 #ifndef __GNU_LIBRARY__
|
|
|
1280 #define __sbrk sbrk
|
|
|
1281 #endif
|
|
|
1282
|
|
|
1283 #ifdef GMALLOC_NEEDS_SBRK_DECL
|
|
|
1284 /* some versions of OSF1 need this */
|
|
|
1285 extern __ptr_t __sbrk __P ((ssize_t increment));
|
|
|
1286 #else
|
|
|
1287 #ifdef __GNU_LIBRARY__
|
|
|
1288 /* It is best not to declare this and cast its result on foreign operating
|
|
|
1289 systems with potentially hostile include files. */
|
|
80
|
1290 #if !(defined(linux) && defined(sparc))
|
|
0
|
1291 extern __ptr_t __sbrk __P ((int increment));
|
|
|
1292 #endif
|
|
|
1293 #endif
|
|
80
|
1294 #endif
|
|
0
|
1295
|
|
|
1296 #ifndef NULL
|
|
|
1297 #define NULL 0
|
|
|
1298 #endif
|
|
|
1299
|
|
|
1300 /* Allocate INCREMENT more bytes of data space,
|
|
|
1301 and return the start of data space, or NULL on errors.
|
|
|
1302 If INCREMENT is negative, shrink data space. */
|
|
|
1303 __ptr_t
|
|
185
|
1304 __default_morecore (
|
|
0
|
1305 #ifdef __STDC__
|
|
185
|
1306 ptrdiff_t increment
|
|
0
|
1307 #else
|
|
|
1308 #ifdef OSF1
|
|
185
|
1309 long increment
|
|
0
|
1310 #else
|
|
185
|
1311 int increment
|
|
0
|
1312 #endif
|
|
|
1313 #endif
|
|
185
|
1314 )
|
|
0
|
1315 {
|
|
|
1316 #ifdef OSF1
|
|
|
1317 __ptr_t result = (__ptr_t) __sbrk ((ssize_t) increment);
|
|
|
1318 #else
|
|
|
1319 __ptr_t result = (__ptr_t) __sbrk ((int) increment);
|
|
|
1320 #endif
|
|
|
1321 if (result == (__ptr_t) -1)
|
|
|
1322 return NULL;
|
|
|
1323 return result;
|
|
|
1324 }
|
|
|
1325 /* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
|
|
|
1326
|
|
|
1327 This library is free software; you can redistribute it and/or
|
|
|
1328 modify it under the terms of the GNU Library General Public License as
|
|
|
1329 published by the Free Software Foundation; either version 2 of the
|
|
|
1330 License, or (at your option) any later version.
|
|
|
1331
|
|
|
1332 This library is distributed in the hope that it will be useful,
|
|
|
1333 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
1334 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
1335 Library General Public License for more details.
|
|
|
1336
|
|
|
1337 You should have received a copy of the GNU General Public License
|
|
|
1338 along with this library; see the file COPYING. If not, write to
|
|
|
1339 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
1340 Boston, MA 02111-1307, USA. */
|
|
|
1341
|
|
|
1342 #ifndef _MALLOC_INTERNAL
|
|
|
1343 #define _MALLOC_INTERNAL
|
|
|
1344 #include <malloc.h>
|
|
|
1345 #endif
|
|
|
1346
|
|
|
1347 __ptr_t
|
|
185
|
1348 memalign (__malloc_size_t alignment, __malloc_size_t size)
|
|
0
|
1349 {
|
|
|
1350 __ptr_t result;
|
|
|
1351 unsigned long int adj;
|
|
|
1352
|
|
|
1353 size = ((size + alignment - 1) / alignment) * alignment;
|
|
|
1354
|
|
|
1355 result = malloc (size);
|
|
|
1356 if (result == NULL)
|
|
|
1357 return NULL;
|
|
|
1358 adj = (unsigned long int) ((unsigned long int) ((char *) result -
|
|
|
1359 (char *) NULL)) % alignment;
|
|
|
1360 if (adj != 0)
|
|
|
1361 {
|
|
|
1362 struct alignlist *l;
|
|
|
1363 for (l = _aligned_blocks; l != NULL; l = l->next)
|
|
|
1364 if (l->aligned == NULL)
|
|
|
1365 /* This slot is free. Use it. */
|
|
|
1366 break;
|
|
|
1367 if (l == NULL)
|
|
|
1368 {
|
|
|
1369 l = (struct alignlist *) malloc (sizeof (struct alignlist));
|
|
|
1370 if (l == NULL)
|
|
|
1371 {
|
|
|
1372 free (result);
|
|
|
1373 return NULL;
|
|
|
1374 }
|
|
|
1375 l->next = _aligned_blocks;
|
|
|
1376 _aligned_blocks = l;
|
|
|
1377 }
|
|
|
1378 l->exact = result;
|
|
|
1379 result = l->aligned = (char *) result + alignment - adj;
|
|
|
1380 }
|
|
|
1381
|
|
|
1382 return result;
|
|
|
1383 }
|
