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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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101 (defined (__STDC__) && defined (SOLARIS2))
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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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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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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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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 };
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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. */
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16
|
261 /* extern int __malloc_initialized; */
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0
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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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271 {
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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 };
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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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283 extern int mcheck __P ((void (*__abortfunc) __P ((enum mcheck_status))));
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284
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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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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 };
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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
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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
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325 #ifdef __cplusplus
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326 }
|
|
|
327 #endif
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328
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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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332
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333 This library is free software; you can redistribute it and/or
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|
|
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,
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|
|
349 or (US mail) as Mike Haertel c/o Free Software Foundation, Inc. */
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350
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|
|
351 #if defined (__GNU_LIBRARY__) || defined (_LIBC)
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|
|
352 #include <stddef.h>
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|
|
353 #include <sys/cdefs.h>
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26
|
354 #if ! (defined (__GLIBC__) && (__GLIBC__ >= 2))
|
|
0
|
355 extern size_t __getpagesize __P ((void));
|
|
26
|
356 #endif
|
|
0
|
357 #else
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|
|
358 #include "getpagesize.h"
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|
|
359 #define __getpagesize() getpagesize()
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|
|
360 #endif
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|
|
361
|
|
|
362 #ifndef _MALLOC_INTERNAL
|
|
|
363 #define _MALLOC_INTERNAL
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|
|
364 #include <malloc.h>
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|
|
365 #endif
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|
|
366
|
|
|
367 static __malloc_size_t pagesize;
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|
|
368
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|
|
369 __ptr_t
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|
|
370 valloc (size)
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|
|
371 __malloc_size_t size;
|
|
|
372 {
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|
|
373 if (pagesize == 0)
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|
|
374 pagesize = __getpagesize ();
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|
|
375
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|
|
376 return memalign (pagesize, size);
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|
|
377 }
|
|
|
378 /* Memory allocator `malloc'.
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|
|
379 Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation
|
|
|
380 Written May 1989 by Mike Haertel.
|
|
|
381
|
|
|
382 This library is free software; you can redistribute it and/or
|
|
|
383 modify it under the terms of the GNU Library General Public License as
|
|
|
384 published by the Free Software Foundation; either version 2 of the
|
|
|
385 License, or (at your option) any later version.
|
|
|
386
|
|
|
387 This library is distributed in the hope that it will be useful,
|
|
|
388 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
389 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
390 Library General Public License for more details.
|
|
|
391
|
|
|
392 You should have received a copy of the GNU General Public License
|
|
|
393 along with this library; see the file COPYING. If not, write to
|
|
|
394 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
395 Boston, MA 02111-1307, USA.
|
|
|
396
|
|
|
397 The author may be reached (Email) at the address mike@ai.mit.edu,
|
|
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398 or (US mail) as Mike Haertel c/o Free Software Foundation, Inc. */
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399
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400 #ifndef _MALLOC_INTERNAL
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401 #define _MALLOC_INTERNAL
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402 #include <malloc.h>
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403 #endif
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404
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405 /* How to really get more memory. */
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406 __ptr_t (*__morecore) __P ((ptrdiff_t __size)) = __default_morecore;
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407
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408 /* Debugging hook for `malloc'. */
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409 __ptr_t (*__malloc_hook) __P ((__malloc_size_t __size));
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410
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411 /* Pointer to the base of the first block. */
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412 char *_heapbase;
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413
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414 /* Block information table. Allocated with align/__free (not malloc/free). */
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415 malloc_info *_heapinfo;
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416
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417 /* Number of info entries. */
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418 static __malloc_size_t heapsize;
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419
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420 /* Search index in the info table. */
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421 __malloc_size_t _heapindex;
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422
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423 /* Limit of valid info table indices. */
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424 __malloc_size_t _heaplimit;
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425
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426 /* Free lists for each fragment size. */
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427 struct list _fraghead[BLOCKLOG];
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428
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429 /* Instrumentation. */
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430 __malloc_size_t _chunks_used;
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431 __malloc_size_t _bytes_used;
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432 __malloc_size_t _chunks_free;
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433 __malloc_size_t _bytes_free;
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434
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435 /* Are you experienced? */
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16
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436 static int __malloc_initialized;
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0
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437
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438 void (*__after_morecore_hook) __P ((void));
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439
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440 /* Aligned allocation. */
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441 static __ptr_t align __P ((__malloc_size_t));
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442 static __ptr_t
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443 align (size)
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444 __malloc_size_t size;
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445 {
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446 __ptr_t result;
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447 unsigned long int adj;
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448
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449 result = (*__morecore) (size);
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450 adj = (unsigned long int) ((unsigned long int) ((char *) result -
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451 (char *) NULL)) % BLOCKSIZE;
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452 if (adj != 0)
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453 {
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454 adj = BLOCKSIZE - adj;
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455 (void) (*__morecore) (adj);
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456 result = (char *) result + adj;
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457 }
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458
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459 if (__after_morecore_hook)
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460 (*__after_morecore_hook) ();
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461
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462 return result;
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463 }
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464
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465 /* Set everything up and remember that we have. */
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466 static int initialize __P ((void));
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467 static int
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468 initialize ()
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469 {
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470 heapsize = HEAP / BLOCKSIZE;
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471 _heapinfo = (malloc_info *) align (heapsize * sizeof (malloc_info));
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472 if (_heapinfo == NULL)
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473 return 0;
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474 memset (_heapinfo, 0, heapsize * sizeof (malloc_info));
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475 _heapinfo[0].free.size = 0;
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476 _heapinfo[0].free.next = _heapinfo[0].free.prev = 0;
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477 _heapindex = 0;
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478 _heapbase = (char *) _heapinfo;
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479
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480 /* Account for the _heapinfo block itself in the statistics. */
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481 _bytes_used = heapsize * sizeof (malloc_info);
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482 _chunks_used = 1;
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483
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484 __malloc_initialized = 1;
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485 return 1;
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486 }
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487
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488 /* Get neatly aligned memory, initializing or
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489 growing the heap info table as necessary. */
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490 static __ptr_t morecore __P ((__malloc_size_t));
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491 static __ptr_t
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492 morecore (size)
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493 __malloc_size_t size;
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494 {
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495 __ptr_t result;
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496 malloc_info *newinfo, *oldinfo;
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497 __malloc_size_t newsize;
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498
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499 result = align (size);
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500 if (result == NULL)
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501 return NULL;
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502
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503 /* Check if we need to grow the info table. */
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504 if ((__malloc_size_t) BLOCK ((char *) result + size) > heapsize)
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505 {
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506 newsize = heapsize;
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507 while ((__malloc_size_t) BLOCK ((char *) result + size) > newsize)
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508 newsize *= 2;
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509 newinfo = (malloc_info *) align (newsize * sizeof (malloc_info));
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510 if (newinfo == NULL)
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511 {
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512 (*__morecore) (-size);
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513 return NULL;
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514 }
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515 memcpy (newinfo, _heapinfo, heapsize * sizeof (malloc_info));
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516 memset (&newinfo[heapsize], 0,
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517 (newsize - heapsize) * sizeof (malloc_info));
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518 oldinfo = _heapinfo;
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519 newinfo[BLOCK (oldinfo)].busy.type = 0;
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520 newinfo[BLOCK (oldinfo)].busy.info.size
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521 = BLOCKIFY (heapsize * sizeof (malloc_info));
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522 _heapinfo = newinfo;
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523 /* Account for the _heapinfo block itself in the statistics. */
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524 _bytes_used += newsize * sizeof (malloc_info);
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525 ++_chunks_used;
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526 _free_internal (oldinfo);
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527 heapsize = newsize;
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528 }
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529
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530 _heaplimit = BLOCK ((char *) result + size);
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531 return result;
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532 }
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533
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534 /* Allocate memory from the heap. */
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535 __ptr_t
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536 malloc (size)
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537 __malloc_size_t size;
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538 {
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539 __ptr_t result;
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540 __malloc_size_t block, blocks, lastblocks, start;
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541 __malloc_size_t i;
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542 struct list *next;
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543
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544 /* ANSI C allows `malloc (0)' to either return NULL, or to return a
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545 valid address you can realloc and free (though not dereference).
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546
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547 It turns out that some extant code (sunrpc, at least Ultrix's version)
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548 expects `malloc (0)' to return non-NULL and breaks otherwise.
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549 Be compatible. */
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550
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551 #ifdef HAVE_X_WINDOWS
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552 /* there is at least one Xt bug where calloc(n,x) is blindly called
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553 where n can be 0, and yet if 0 is returned, Xt barfs */
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554 if (size == 0)
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555 size = sizeof (struct list);
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556 #else
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557 if (size == 0)
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558 return NULL;
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559 #endif
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560
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561 if (__malloc_hook != NULL)
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562 return (*__malloc_hook) (size);
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563
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564 if (!__malloc_initialized)
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565 if (!initialize ())
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566 return NULL;
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567
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568 #ifdef SUNOS_LOCALTIME_BUG
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|
569 /* Workaround for localtime() allocating 8 bytes and writing 9 bug... */
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570 if (size < 16)
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571 size = 16;
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572 #endif
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573
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574 if (size < sizeof (struct list))
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575 size = sizeof (struct list);
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|
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576
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577 /* Determine the allocation policy based on the request size. */
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578 if (size <= BLOCKSIZE / 2)
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579 {
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580 /* Small allocation to receive a fragment of a block.
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581 Determine the logarithm to base two of the fragment size. */
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|
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582 __malloc_size_t log = 1;
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583 --size;
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|
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584 while ((size /= 2) != 0)
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585 ++log;
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586
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|
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587 /* Look in the fragment lists for a
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588 free fragment of the desired size. */
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|
589 next = _fraghead[log].next;
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590 if (next != NULL)
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591 {
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592 /* There are free fragments of this size.
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593 Pop a fragment out of the fragment list and return it.
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594 Update the block's nfree and first counters. */
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|
595 result = (__ptr_t) next;
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|
596 next->prev->next = next->next;
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597 if (next->next != NULL)
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|
598 next->next->prev = next->prev;
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|
|
599 block = BLOCK (result);
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600 if (--_heapinfo[block].busy.info.frag.nfree != 0)
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|
601 _heapinfo[block].busy.info.frag.first = (unsigned long int)
|
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|
602 ((unsigned long int) ((char *) next->next - (char *) NULL)
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603 % BLOCKSIZE) >> log;
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|
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604
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|
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605 /* Update the statistics. */
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|
606 ++_chunks_used;
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|
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607 _bytes_used += 1 << log;
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608 --_chunks_free;
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|
609 _bytes_free -= 1 << log;
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|
|
610 }
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611 else
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612 {
|
|
|
613 /* No free fragments of the desired size, so get a new block
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|
|
614 and break it into fragments, returning the first. */
|
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615 result = malloc (BLOCKSIZE);
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616 if (result == NULL)
|
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617 return NULL;
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|
|
618
|
|
|
619 /* Link all fragments but the first into the free list. */
|
|
|
620 for (i = 1; i < (__malloc_size_t) (BLOCKSIZE >> log); ++i)
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621 {
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|
|
622 next = (struct list *) ((char *) result + (i << log));
|
|
|
623 next->next = _fraghead[log].next;
|
|
|
624 next->prev = &_fraghead[log];
|
|
|
625 next->prev->next = next;
|
|
|
626 if (next->next != NULL)
|
|
|
627 next->next->prev = next;
|
|
|
628 }
|
|
|
629
|
|
|
630 /* Initialize the nfree and first counters for this block. */
|
|
|
631 block = BLOCK (result);
|
|
|
632 _heapinfo[block].busy.type = log;
|
|
|
633 _heapinfo[block].busy.info.frag.nfree = i - 1;
|
|
|
634 _heapinfo[block].busy.info.frag.first = i - 1;
|
|
|
635
|
|
|
636 _chunks_free += (BLOCKSIZE >> log) - 1;
|
|
|
637 _bytes_free += BLOCKSIZE - (1 << log);
|
|
|
638 _bytes_used -= BLOCKSIZE - (1 << log);
|
|
|
639 }
|
|
|
640 }
|
|
|
641 else
|
|
|
642 {
|
|
|
643 /* Large allocation to receive one or more blocks.
|
|
|
644 Search the free list in a circle starting at the last place visited.
|
|
|
645 If we loop completely around without finding a large enough
|
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|
646 space we will have to get more memory from the system. */
|
|
|
647 blocks = BLOCKIFY (size);
|
|
|
648 start = block = _heapindex;
|
|
|
649 while (_heapinfo[block].free.size < blocks)
|
|
|
650 {
|
|
|
651 block = _heapinfo[block].free.next;
|
|
|
652 if (block == start)
|
|
|
653 {
|
|
|
654 /* Need to get more from the system. Check to see if
|
|
|
655 the new core will be contiguous with the final free
|
|
|
656 block; if so we don't need to get as much. */
|
|
|
657 block = _heapinfo[0].free.prev;
|
|
|
658 lastblocks = _heapinfo[block].free.size;
|
|
|
659 if (_heaplimit != 0 && block + lastblocks == _heaplimit &&
|
|
|
660 (*__morecore) (0) == ADDRESS (block + lastblocks) &&
|
|
|
661 (morecore ((blocks - lastblocks) * BLOCKSIZE)) != NULL)
|
|
|
662 {
|
|
|
663 /* Which block we are extending (the `final free
|
|
|
664 block' referred to above) might have changed, if
|
|
|
665 it got combined with a freed info table. */
|
|
|
666 block = _heapinfo[0].free.prev;
|
|
|
667 _heapinfo[block].free.size += (blocks - lastblocks);
|
|
|
668 _bytes_free += (blocks - lastblocks) * BLOCKSIZE;
|
|
|
669 continue;
|
|
|
670 }
|
|
|
671 result = morecore (blocks * BLOCKSIZE);
|
|
|
672 if (result == NULL)
|
|
|
673 return NULL;
|
|
|
674 block = BLOCK (result);
|
|
|
675 _heapinfo[block].busy.type = 0;
|
|
|
676 _heapinfo[block].busy.info.size = blocks;
|
|
|
677 ++_chunks_used;
|
|
|
678 _bytes_used += blocks * BLOCKSIZE;
|
|
|
679 return result;
|
|
|
680 }
|
|
|
681 }
|
|
|
682
|
|
|
683 /* At this point we have found a suitable free list entry.
|
|
|
684 Figure out how to remove what we need from the list. */
|
|
|
685 result = ADDRESS (block);
|
|
|
686 if (_heapinfo[block].free.size > blocks)
|
|
|
687 {
|
|
|
688 /* The block we found has a bit left over,
|
|
|
689 so relink the tail end back into the free list. */
|
|
|
690 _heapinfo[block + blocks].free.size
|
|
|
691 = _heapinfo[block].free.size - blocks;
|
|
|
692 _heapinfo[block + blocks].free.next
|
|
|
693 = _heapinfo[block].free.next;
|
|
|
694 _heapinfo[block + blocks].free.prev
|
|
|
695 = _heapinfo[block].free.prev;
|
|
|
696 _heapinfo[_heapinfo[block].free.prev].free.next
|
|
|
697 = _heapinfo[_heapinfo[block].free.next].free.prev
|
|
|
698 = _heapindex = block + blocks;
|
|
|
699 }
|
|
|
700 else
|
|
|
701 {
|
|
|
702 /* The block exactly matches our requirements,
|
|
|
703 so just remove it from the list. */
|
|
|
704 _heapinfo[_heapinfo[block].free.next].free.prev
|
|
|
705 = _heapinfo[block].free.prev;
|
|
|
706 _heapinfo[_heapinfo[block].free.prev].free.next
|
|
|
707 = _heapindex = _heapinfo[block].free.next;
|
|
|
708 --_chunks_free;
|
|
|
709 }
|
|
|
710
|
|
|
711 _heapinfo[block].busy.type = 0;
|
|
|
712 _heapinfo[block].busy.info.size = blocks;
|
|
|
713 ++_chunks_used;
|
|
|
714 _bytes_used += blocks * BLOCKSIZE;
|
|
|
715 _bytes_free -= blocks * BLOCKSIZE;
|
|
|
716 }
|
|
|
717
|
|
|
718 return result;
|
|
|
719 }
|
|
|
720
|
|
|
721 #ifndef _LIBC
|
|
|
722
|
|
|
723 /* On some ANSI C systems, some libc functions call _malloc, _free
|
|
|
724 and _realloc. Make them use the GNU functions. */
|
|
|
725
|
|
|
726 __ptr_t _malloc (__malloc_size_t size);
|
|
|
727 __ptr_t
|
|
|
728 _malloc (__malloc_size_t size)
|
|
|
729 {
|
|
|
730 return malloc (size);
|
|
|
731 }
|
|
|
732
|
|
|
733 void _free (__ptr_t ptr);
|
|
|
734 void
|
|
|
735 _free (__ptr_t ptr)
|
|
|
736 {
|
|
|
737 free (ptr);
|
|
|
738 }
|
|
|
739
|
|
|
740 __ptr_t _realloc (__ptr_t ptr, __malloc_size_t size);
|
|
|
741 __ptr_t
|
|
|
742 _realloc (__ptr_t ptr, __malloc_size_t size)
|
|
|
743 {
|
|
|
744 return realloc (ptr, size);
|
|
|
745 }
|
|
|
746
|
|
|
747 #endif
|
|
|
748 /* Free a block of memory allocated by `malloc'.
|
|
|
749 Copyright 1990, 1991, 1992, 1994 Free Software Foundation
|
|
|
750 Written May 1989 by Mike Haertel.
|
|
|
751
|
|
|
752 This library is free software; you can redistribute it and/or
|
|
|
753 modify it under the terms of the GNU Library General Public License as
|
|
|
754 published by the Free Software Foundation; either version 2 of the
|
|
|
755 License, or (at your option) any later version.
|
|
|
756
|
|
|
757 This library is distributed in the hope that it will be useful,
|
|
|
758 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
759 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
760 Library General Public License for more details.
|
|
|
761
|
|
|
762 You should have received a copy of the GNU General Public License
|
|
|
763 along with this library; see the file COPYING. If not, write to
|
|
|
764 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
765 Boston, MA 02111-1307, USA.
|
|
|
766
|
|
|
767 The author may be reached (Email) at the address mike@ai.mit.edu,
|
|
|
768 or (US mail) as Mike Haertel c/o Free Software Foundation, Inc. */
|
|
|
769
|
|
|
770 #ifndef _MALLOC_INTERNAL
|
|
|
771 #define _MALLOC_INTERNAL
|
|
|
772 #include <malloc.h>
|
|
|
773 #endif
|
|
|
774
|
|
|
775 /* Debugging hook for free. */
|
|
|
776 void (*__free_hook) __P ((__ptr_t __ptr));
|
|
|
777
|
|
|
778 /* List of blocks allocated by memalign. */
|
|
|
779 struct alignlist *_aligned_blocks = NULL;
|
|
|
780
|
|
|
781 /* Return memory to the heap.
|
|
|
782 Like `free' but don't call a __free_hook if there is one. */
|
|
|
783 void
|
|
|
784 _free_internal (ptr)
|
|
|
785 __ptr_t ptr;
|
|
|
786 {
|
|
|
787 int type;
|
|
|
788 __malloc_size_t block, blocks;
|
|
|
789 __malloc_size_t i;
|
|
|
790 struct list *prev, *next;
|
|
|
791
|
|
|
792 block = BLOCK (ptr);
|
|
|
793
|
|
|
794 type = _heapinfo[block].busy.type;
|
|
|
795 switch (type)
|
|
|
796 {
|
|
|
797 case 0:
|
|
|
798 /* Get as many statistics as early as we can. */
|
|
|
799 --_chunks_used;
|
|
|
800 _bytes_used -= _heapinfo[block].busy.info.size * BLOCKSIZE;
|
|
|
801 _bytes_free += _heapinfo[block].busy.info.size * BLOCKSIZE;
|
|
|
802
|
|
|
803 /* Find the free cluster previous to this one in the free list.
|
|
|
804 Start searching at the last block referenced; this may benefit
|
|
|
805 programs with locality of allocation. */
|
|
|
806 i = _heapindex;
|
|
|
807 if (i > block)
|
|
|
808 while (i > block)
|
|
|
809 i = _heapinfo[i].free.prev;
|
|
|
810 else
|
|
|
811 {
|
|
|
812 do
|
|
|
813 i = _heapinfo[i].free.next;
|
|
|
814 while (i > 0 && i < block);
|
|
|
815 i = _heapinfo[i].free.prev;
|
|
|
816 }
|
|
|
817
|
|
|
818 /* Determine how to link this block into the free list. */
|
|
|
819 if (block == i + _heapinfo[i].free.size)
|
|
|
820 {
|
|
|
821 /* Coalesce this block with its predecessor. */
|
|
|
822 _heapinfo[i].free.size += _heapinfo[block].busy.info.size;
|
|
|
823 block = i;
|
|
|
824 }
|
|
|
825 else
|
|
|
826 {
|
|
|
827 /* Really link this block back into the free list. */
|
|
|
828 _heapinfo[block].free.size = _heapinfo[block].busy.info.size;
|
|
|
829 _heapinfo[block].free.next = _heapinfo[i].free.next;
|
|
|
830 _heapinfo[block].free.prev = i;
|
|
|
831 _heapinfo[i].free.next = block;
|
|
|
832 _heapinfo[_heapinfo[block].free.next].free.prev = block;
|
|
|
833 ++_chunks_free;
|
|
|
834 }
|
|
|
835
|
|
|
836 /* Now that the block is linked in, see if we can coalesce it
|
|
|
837 with its successor (by deleting its successor from the list
|
|
|
838 and adding in its size). */
|
|
|
839 if (block + _heapinfo[block].free.size == _heapinfo[block].free.next)
|
|
|
840 {
|
|
|
841 _heapinfo[block].free.size
|
|
|
842 += _heapinfo[_heapinfo[block].free.next].free.size;
|
|
|
843 _heapinfo[block].free.next
|
|
|
844 = _heapinfo[_heapinfo[block].free.next].free.next;
|
|
|
845 _heapinfo[_heapinfo[block].free.next].free.prev = block;
|
|
|
846 --_chunks_free;
|
|
|
847 }
|
|
|
848
|
|
|
849 /* Now see if we can return stuff to the system. */
|
|
|
850 blocks = _heapinfo[block].free.size;
|
|
|
851 if (blocks >= FINAL_FREE_BLOCKS && block + blocks == _heaplimit
|
|
|
852 && (*__morecore) (0) == ADDRESS (block + blocks))
|
|
|
853 {
|
|
|
854 __malloc_size_t bytes = blocks * BLOCKSIZE;
|
|
|
855 _heaplimit -= blocks;
|
|
|
856 (*__morecore) (-bytes);
|
|
|
857 _heapinfo[_heapinfo[block].free.prev].free.next
|
|
|
858 = _heapinfo[block].free.next;
|
|
|
859 _heapinfo[_heapinfo[block].free.next].free.prev
|
|
|
860 = _heapinfo[block].free.prev;
|
|
|
861 block = _heapinfo[block].free.prev;
|
|
|
862 --_chunks_free;
|
|
|
863 _bytes_free -= bytes;
|
|
|
864 }
|
|
|
865
|
|
|
866 /* Set the next search to begin at this block. */
|
|
|
867 _heapindex = block;
|
|
|
868 break;
|
|
|
869
|
|
|
870 default:
|
|
|
871 /* Do some of the statistics. */
|
|
|
872 --_chunks_used;
|
|
|
873 _bytes_used -= 1 << type;
|
|
|
874 ++_chunks_free;
|
|
|
875 _bytes_free += 1 << type;
|
|
|
876
|
|
|
877 /* Get the address of the first free fragment in this block. */
|
|
|
878 prev = (struct list *) ((char *) ADDRESS (block) +
|
|
|
879 (_heapinfo[block].busy.info.frag.first << type));
|
|
|
880
|
|
|
881 if (_heapinfo[block].busy.info.frag.nfree == (BLOCKSIZE >> type) - 1)
|
|
|
882 {
|
|
|
883 /* If all fragments of this block are free, remove them
|
|
|
884 from the fragment list and free the whole block. */
|
|
|
885 next = prev;
|
|
|
886 for (i = 1; i < (__malloc_size_t) (BLOCKSIZE >> type); ++i)
|
|
|
887 next = next->next;
|
|
|
888 prev->prev->next = next;
|
|
|
889 if (next != NULL)
|
|
|
890 next->prev = prev->prev;
|
|
|
891 _heapinfo[block].busy.type = 0;
|
|
|
892 _heapinfo[block].busy.info.size = 1;
|
|
|
893
|
|
|
894 /* Keep the statistics accurate. */
|
|
|
895 ++_chunks_used;
|
|
|
896 _bytes_used += BLOCKSIZE;
|
|
|
897 _chunks_free -= BLOCKSIZE >> type;
|
|
|
898 _bytes_free -= BLOCKSIZE;
|
|
|
899
|
|
|
900 free (ADDRESS (block));
|
|
|
901 }
|
|
|
902 else if (_heapinfo[block].busy.info.frag.nfree != 0)
|
|
|
903 {
|
|
|
904 /* If some fragments of this block are free, link this
|
|
|
905 fragment into the fragment list after the first free
|
|
|
906 fragment of this block. */
|
|
|
907 next = (struct list *) ptr;
|
|
|
908 next->next = prev->next;
|
|
|
909 next->prev = prev;
|
|
|
910 prev->next = next;
|
|
|
911 if (next->next != NULL)
|
|
|
912 next->next->prev = next;
|
|
|
913 ++_heapinfo[block].busy.info.frag.nfree;
|
|
|
914 }
|
|
|
915 else
|
|
|
916 {
|
|
|
917 /* No fragments of this block are free, so link this
|
|
|
918 fragment into the fragment list and announce that
|
|
|
919 it is the first free fragment of this block. */
|
|
|
920 prev = (struct list *) ptr;
|
|
|
921 _heapinfo[block].busy.info.frag.nfree = 1;
|
|
|
922 _heapinfo[block].busy.info.frag.first = (unsigned long int)
|
|
|
923 ((unsigned long int) ((char *) ptr - (char *) NULL)
|
|
|
924 % BLOCKSIZE >> type);
|
|
|
925 prev->next = _fraghead[type].next;
|
|
|
926 prev->prev = &_fraghead[type];
|
|
|
927 prev->prev->next = prev;
|
|
|
928 if (prev->next != NULL)
|
|
|
929 prev->next->prev = prev;
|
|
|
930 }
|
|
|
931 break;
|
|
|
932 }
|
|
|
933 }
|
|
|
934
|
|
|
935 /* Return memory to the heap. */
|
|
|
936 __free_ret_t
|
|
|
937 free (ptr)
|
|
|
938 __ptr_t ptr;
|
|
|
939 {
|
|
|
940 struct alignlist *l;
|
|
|
941
|
|
|
942 if (ptr == NULL)
|
|
|
943 return;
|
|
|
944
|
|
|
945 for (l = _aligned_blocks; l != NULL; l = l->next)
|
|
|
946 if (l->aligned == ptr)
|
|
|
947 {
|
|
|
948 l->aligned = NULL; /* Mark the slot in the list as free. */
|
|
|
949 ptr = l->exact;
|
|
|
950 break;
|
|
|
951 }
|
|
|
952
|
|
|
953 if (__free_hook != NULL)
|
|
|
954 (*__free_hook) (ptr);
|
|
|
955 else
|
|
|
956 _free_internal (ptr);
|
|
|
957 }
|
|
|
958 /* Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc.
|
|
|
959 This file is part of the GNU C Library.
|
|
|
960
|
|
|
961 The GNU C Library is free software; you can redistribute it and/or
|
|
|
962 modify it under the terms of the GNU Library General Public License as
|
|
|
963 published by the Free Software Foundation; either version 2 of the
|
|
|
964 License, or (at your option) any later version.
|
|
|
965
|
|
|
966 The GNU C Library is distributed in the hope that it will be useful,
|
|
|
967 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
968 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
969 Library General Public License for more details.
|
|
|
970
|
|
|
971 You should have received a copy of the GNU General Public License
|
|
|
972 along with this library; see the file COPYING. If not, write to
|
|
|
973 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
974 Boston, MA 02111-1307, USA. */
|
|
|
975
|
|
|
976 #ifndef _MALLOC_INTERNAL
|
|
|
977 #define _MALLOC_INTERNAL
|
|
|
978 #include <malloc.h>
|
|
|
979 #endif
|
|
|
980
|
|
|
981 #ifdef _LIBC
|
|
|
982
|
|
|
983 #include <ansidecl.h>
|
|
|
984 #include <gnu-stabs.h>
|
|
|
985
|
|
|
986 #undef cfree
|
|
|
987
|
|
|
988 function_alias(cfree, free, void, (ptr),
|
|
|
989 DEFUN(cfree, (ptr), PTR ptr))
|
|
|
990
|
|
|
991 #else
|
|
|
992
|
|
|
993 void cfree (__ptr_t ptr);
|
|
|
994 void
|
|
|
995 cfree (__ptr_t ptr)
|
|
|
996 {
|
|
|
997 free (ptr);
|
|
|
998 }
|
|
|
999
|
|
|
1000 #endif
|
|
|
1001 /* Change the size of a block allocated by `malloc'.
|
|
|
1002 Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
|
|
|
1003 Written May 1989 by Mike Haertel.
|
|
|
1004
|
|
|
1005 This library is free software; you can redistribute it and/or
|
|
|
1006 modify it under the terms of the GNU Library General Public License as
|
|
|
1007 published by the Free Software Foundation; either version 2 of the
|
|
|
1008 License, or (at your option) any later version.
|
|
|
1009
|
|
|
1010 This library is distributed in the hope that it will be useful,
|
|
|
1011 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
1012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
1013 Library General Public License for more details.
|
|
|
1014
|
|
|
1015 You should have received a copy of the GNU General Public License
|
|
|
1016 along with this library; see the file COPYING. If not, write to
|
|
|
1017 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
1018 Boston, MA 02111-1307, USA.
|
|
|
1019
|
|
|
1020 The author may be reached (Email) at the address mike@ai.mit.edu,
|
|
|
1021 or (US mail) as Mike Haertel c/o Free Software Foundation, Inc. */
|
|
|
1022
|
|
|
1023 #ifndef _MALLOC_INTERNAL
|
|
|
1024 #define _MALLOC_INTERNAL
|
|
|
1025 #include <malloc.h>
|
|
|
1026 #endif
|
|
|
1027
|
|
|
1028 #if 0 /* FSFmacs */
|
|
|
1029 /* XEmacs requires an ANSI compiler, and memmove() is part of the ANSI-
|
|
|
1030 mandated functions. For losing systems like SunOS 4, we provide
|
|
|
1031 our own memmove(). */
|
|
|
1032
|
|
|
1033 #if (defined (MEMMOVE_MISSING) || \
|
|
|
1034 !defined(_LIBC) && !defined(STDC_HEADERS) && !defined(USG))
|
|
|
1035
|
|
|
1036 /* Snarfed directly from Emacs src/dispnew.c:
|
|
|
1037 XXX Should use system bcopy if it handles overlap. */
|
|
|
1038 #ifndef emacs
|
|
|
1039
|
|
|
1040 /* Like bcopy except never gets confused by overlap. */
|
|
|
1041
|
|
|
1042 static void
|
|
|
1043 safe_bcopy (from, to, size)
|
|
|
1044 char *from, *to;
|
|
|
1045 int size;
|
|
|
1046 {
|
|
|
1047 if (size <= 0 || from == to)
|
|
|
1048 return;
|
|
|
1049
|
|
|
1050 /* If the source and destination don't overlap, then bcopy can
|
|
|
1051 handle it. If they do overlap, but the destination is lower in
|
|
|
1052 memory than the source, we'll assume bcopy can handle that. */
|
|
|
1053 if (to < from || from + size <= to)
|
|
|
1054 bcopy (from, to, size);
|
|
|
1055
|
|
|
1056 /* Otherwise, we'll copy from the end. */
|
|
|
1057 else
|
|
|
1058 {
|
|
|
1059 char *endf = from + size;
|
|
|
1060 char *endt = to + size;
|
|
|
1061
|
|
|
1062 /* If TO - FROM is large, then we should break the copy into
|
|
|
1063 nonoverlapping chunks of TO - FROM bytes each. However, if
|
|
|
1064 TO - FROM is small, then the bcopy function call overhead
|
|
|
1065 makes this not worth it. The crossover point could be about
|
|
|
1066 anywhere. Since I don't think the obvious copy loop is too
|
|
|
1067 bad, I'm trying to err in its favor. */
|
|
|
1068 if (to - from < 64)
|
|
|
1069 {
|
|
|
1070 do
|
|
|
1071 *--endt = *--endf;
|
|
|
1072 while (endf != from);
|
|
|
1073 }
|
|
|
1074 else
|
|
|
1075 {
|
|
|
1076 for (;;)
|
|
|
1077 {
|
|
|
1078 endt -= (to - from);
|
|
|
1079 endf -= (to - from);
|
|
|
1080
|
|
|
1081 if (endt < to)
|
|
|
1082 break;
|
|
|
1083
|
|
|
1084 bcopy (endf, endt, to - from);
|
|
|
1085 }
|
|
|
1086
|
|
|
1087 /* If SIZE wasn't a multiple of TO - FROM, there will be a
|
|
|
1088 little left over. The amount left over is
|
|
|
1089 (endt + (to - from)) - to, which is endt - from. */
|
|
|
1090 bcopy (from, to, endt - from);
|
|
|
1091 }
|
|
|
1092 }
|
|
|
1093 }
|
|
|
1094 #endif /* Not emacs. */
|
|
|
1095
|
|
|
1096 #define memmove(to, from, size) safe_bcopy ((from), (to), (size))
|
|
|
1097
|
|
|
1098 #endif
|
|
|
1099
|
|
|
1100 #endif /* FSFmacs */
|
|
|
1101
|
|
|
1102
|
|
|
1103 #ifndef min
|
|
|
1104 #define min(A, B) ((A) < (B) ? (A) : (B))
|
|
|
1105 #endif
|
|
|
1106
|
|
|
1107 /* Debugging hook for realloc. */
|
|
|
1108 __ptr_t (*__realloc_hook) __P ((__ptr_t __ptr, __malloc_size_t __size));
|
|
|
1109
|
|
|
1110 /* Resize the given region to the new size, returning a pointer
|
|
|
1111 to the (possibly moved) region. This is optimized for speed;
|
|
|
1112 some benchmarks seem to indicate that greater compactness is
|
|
|
1113 achieved by unconditionally allocating and copying to a
|
|
|
1114 new region. This module has incestuous knowledge of the
|
|
|
1115 internals of both free and malloc. */
|
|
|
1116 __ptr_t
|
|
|
1117 realloc (ptr, size)
|
|
|
1118 __ptr_t ptr;
|
|
|
1119 __malloc_size_t size;
|
|
|
1120 {
|
|
|
1121 __ptr_t result;
|
|
|
1122 int type;
|
|
|
1123 __malloc_size_t block, blocks, oldlimit;
|
|
|
1124
|
|
|
1125 if (size == 0)
|
|
|
1126 {
|
|
|
1127 free (ptr);
|
|
|
1128 return malloc (0);
|
|
|
1129 }
|
|
|
1130 else if (ptr == NULL)
|
|
|
1131 return malloc (size);
|
|
|
1132
|
|
|
1133 if (__realloc_hook != NULL)
|
|
|
1134 return (*__realloc_hook) (ptr, size);
|
|
|
1135
|
|
|
1136 block = BLOCK (ptr);
|
|
|
1137
|
|
|
1138 type = _heapinfo[block].busy.type;
|
|
|
1139 switch (type)
|
|
|
1140 {
|
|
|
1141 case 0:
|
|
|
1142 /* Maybe reallocate a large block to a small fragment. */
|
|
|
1143 if (size <= BLOCKSIZE / 2)
|
|
|
1144 {
|
|
|
1145 result = malloc (size);
|
|
|
1146 if (result != NULL)
|
|
|
1147 {
|
|
|
1148 memcpy (result, ptr, size);
|
|
|
1149 _free_internal (ptr);
|
|
|
1150 return result;
|
|
|
1151 }
|
|
|
1152 }
|
|
|
1153
|
|
|
1154 /* The new size is a large allocation as well;
|
|
|
1155 see if we can hold it in place. */
|
|
|
1156 blocks = BLOCKIFY (size);
|
|
|
1157 if (blocks < _heapinfo[block].busy.info.size)
|
|
|
1158 {
|
|
|
1159 /* The new size is smaller; return
|
|
|
1160 excess memory to the free list. */
|
|
|
1161 _heapinfo[block + blocks].busy.type = 0;
|
|
|
1162 _heapinfo[block + blocks].busy.info.size
|
|
|
1163 = _heapinfo[block].busy.info.size - blocks;
|
|
|
1164 _heapinfo[block].busy.info.size = blocks;
|
|
|
1165 /* We have just created a new chunk by splitting a chunk in two.
|
|
|
1166 Now we will free this chunk; increment the statistics counter
|
|
|
1167 so it doesn't become wrong when _free_internal decrements it. */
|
|
|
1168 ++_chunks_used;
|
|
|
1169 _free_internal (ADDRESS (block + blocks));
|
|
|
1170 result = ptr;
|
|
|
1171 }
|
|
|
1172 else if (blocks == _heapinfo[block].busy.info.size)
|
|
|
1173 /* No size change necessary. */
|
|
|
1174 result = ptr;
|
|
|
1175 else
|
|
|
1176 {
|
|
|
1177 /* Won't fit, so allocate a new region that will.
|
|
|
1178 Free the old region first in case there is sufficient
|
|
|
1179 adjacent free space to grow without moving. */
|
|
|
1180 blocks = _heapinfo[block].busy.info.size;
|
|
|
1181 /* Prevent free from actually returning memory to the system. */
|
|
|
1182 oldlimit = _heaplimit;
|
|
|
1183 _heaplimit = 0;
|
|
|
1184 free (ptr);
|
|
|
1185 _heaplimit = oldlimit;
|
|
|
1186 result = malloc (size);
|
|
|
1187 if (result == NULL)
|
|
|
1188 {
|
|
|
1189 /* Now we're really in trouble. We have to unfree
|
|
|
1190 the thing we just freed. Unfortunately it might
|
|
|
1191 have been coalesced with its neighbors. */
|
|
|
1192 if (_heapindex == block)
|
|
|
1193 (void) malloc (blocks * BLOCKSIZE);
|
|
|
1194 else
|
|
|
1195 {
|
|
|
1196 __ptr_t previous = malloc ((block - _heapindex) * BLOCKSIZE);
|
|
|
1197 (void) malloc (blocks * BLOCKSIZE);
|
|
|
1198 free (previous);
|
|
|
1199 }
|
|
|
1200 return NULL;
|
|
|
1201 }
|
|
|
1202 if (ptr != result)
|
|
|
1203 memmove (result, ptr, blocks * BLOCKSIZE);
|
|
|
1204 }
|
|
|
1205 break;
|
|
|
1206
|
|
|
1207 default:
|
|
|
1208 /* Old size is a fragment; type is logarithm
|
|
|
1209 to base two of the fragment size. */
|
|
|
1210 if (size > (__malloc_size_t) (1 << (type - 1)) &&
|
|
|
1211 size <= (__malloc_size_t) (1 << type))
|
|
|
1212 /* The new size is the same kind of fragment. */
|
|
|
1213 result = ptr;
|
|
|
1214 else
|
|
|
1215 {
|
|
|
1216 /* The new size is different; allocate a new space,
|
|
|
1217 and copy the lesser of the new size and the old. */
|
|
|
1218 result = malloc (size);
|
|
|
1219 if (result == NULL)
|
|
|
1220 return NULL;
|
|
|
1221 memcpy (result, ptr, min (size, (__malloc_size_t) 1 << type));
|
|
|
1222 free (ptr);
|
|
|
1223 }
|
|
|
1224 break;
|
|
|
1225 }
|
|
|
1226
|
|
|
1227 return result;
|
|
|
1228 }
|
|
|
1229 /* Copyright (C) 1991, 1992, 1994 Free Software Foundation, Inc.
|
|
|
1230
|
|
|
1231 This library is free software; you can redistribute it and/or
|
|
|
1232 modify it under the terms of the GNU Library General Public License as
|
|
|
1233 published by the Free Software Foundation; either version 2 of the
|
|
|
1234 License, or (at your option) any later version.
|
|
|
1235
|
|
|
1236 This library is distributed in the hope that it will be useful,
|
|
|
1237 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
1238 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
1239 Library General Public License for more details.
|
|
|
1240
|
|
|
1241 You should have received a copy of the GNU General Public License
|
|
|
1242 along with this library; see the file COPYING. If not, write to
|
|
|
1243 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
1244 Boston, MA 02111-1307, USA.
|
|
|
1245
|
|
|
1246 The author may be reached (Email) at the address mike@ai.mit.edu,
|
|
|
1247 or (US mail) as Mike Haertel c/o Free Software Foundation, Inc. */
|
|
|
1248
|
|
|
1249 #ifndef _MALLOC_INTERNAL
|
|
|
1250 #define _MALLOC_INTERNAL
|
|
|
1251 #include <malloc.h>
|
|
|
1252 #endif
|
|
|
1253
|
|
|
1254 /* Allocate an array of NMEMB elements each SIZE bytes long.
|
|
|
1255 The entire array is initialized to zeros. */
|
|
|
1256 __ptr_t
|
|
|
1257 calloc (nmemb, size)
|
|
|
1258 __malloc_size_t nmemb;
|
|
|
1259 __malloc_size_t size;
|
|
|
1260 {
|
|
|
1261 __ptr_t result = malloc (nmemb * size);
|
|
|
1262
|
|
|
1263 if (result != NULL)
|
|
|
1264 (void) memset (result, 0, nmemb * size);
|
|
|
1265
|
|
|
1266 return result;
|
|
|
1267 }
|
|
|
1268 /* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
|
|
|
1269 This file is part of the GNU C Library.
|
|
|
1270
|
|
|
1271 The GNU C Library is free software; you can redistribute it and/or modify
|
|
|
1272 it under the terms of the GNU General Public License as published by
|
|
|
1273 the Free Software Foundation; either version 2, or (at your option)
|
|
|
1274 any later version.
|
|
|
1275
|
|
|
1276 The GNU C Library is distributed in the hope that it will be useful,
|
|
|
1277 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
1278 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
1279 GNU General Public License for more details.
|
|
|
1280
|
|
|
1281 You should have received a copy of the GNU General Public License
|
|
|
1282 along with the GNU C Library; see the file COPYING. If not, write to
|
|
|
1283 the Free the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
1284 Boston, MA 02111-1307, USA. */
|
|
|
1285
|
|
|
1286 #ifndef _MALLOC_INTERNAL
|
|
|
1287 #define _MALLOC_INTERNAL
|
|
|
1288 #include <malloc.h>
|
|
|
1289 #endif
|
|
|
1290
|
|
|
1291 #ifndef __GNU_LIBRARY__
|
|
|
1292 #define __sbrk sbrk
|
|
|
1293 #endif
|
|
|
1294
|
|
|
1295 #ifdef GMALLOC_NEEDS_SBRK_DECL
|
|
|
1296 /* some versions of OSF1 need this */
|
|
|
1297 extern __ptr_t __sbrk __P ((ssize_t increment));
|
|
|
1298 #else
|
|
|
1299 #ifdef __GNU_LIBRARY__
|
|
|
1300 /* It is best not to declare this and cast its result on foreign operating
|
|
|
1301 systems with potentially hostile include files. */
|
|
14
|
1302 #if !(defined(linux) && defined(sparc))
|
|
0
|
1303 extern __ptr_t __sbrk __P ((int increment));
|
|
|
1304 #endif
|
|
|
1305 #endif
|
|
14
|
1306 #endif
|
|
0
|
1307
|
|
|
1308 #ifndef NULL
|
|
|
1309 #define NULL 0
|
|
|
1310 #endif
|
|
|
1311
|
|
|
1312 /* Allocate INCREMENT more bytes of data space,
|
|
|
1313 and return the start of data space, or NULL on errors.
|
|
|
1314 If INCREMENT is negative, shrink data space. */
|
|
|
1315 __ptr_t
|
|
|
1316 __default_morecore (increment)
|
|
|
1317 #ifdef __STDC__
|
|
|
1318 ptrdiff_t increment;
|
|
|
1319 #else
|
|
|
1320 #ifdef OSF1
|
|
|
1321 long increment;
|
|
|
1322 #else
|
|
|
1323 int increment;
|
|
|
1324 #endif
|
|
|
1325 #endif
|
|
|
1326 {
|
|
|
1327 #ifdef OSF1
|
|
|
1328 __ptr_t result = (__ptr_t) __sbrk ((ssize_t) increment);
|
|
|
1329 #else
|
|
|
1330 __ptr_t result = (__ptr_t) __sbrk ((int) increment);
|
|
|
1331 #endif
|
|
|
1332 if (result == (__ptr_t) -1)
|
|
|
1333 return NULL;
|
|
|
1334 return result;
|
|
|
1335 }
|
|
|
1336 /* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
|
|
|
1337
|
|
|
1338 This library is free software; you can redistribute it and/or
|
|
|
1339 modify it under the terms of the GNU Library General Public License as
|
|
|
1340 published by the Free Software Foundation; either version 2 of the
|
|
|
1341 License, or (at your option) any later version.
|
|
|
1342
|
|
|
1343 This library is distributed in the hope that it will be useful,
|
|
|
1344 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
1345 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
1346 Library General Public License for more details.
|
|
|
1347
|
|
|
1348 You should have received a copy of the GNU General Public License
|
|
|
1349 along with this library; see the file COPYING. If not, write to
|
|
|
1350 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
|
1351 Boston, MA 02111-1307, USA. */
|
|
|
1352
|
|
|
1353 #ifndef _MALLOC_INTERNAL
|
|
|
1354 #define _MALLOC_INTERNAL
|
|
|
1355 #include <malloc.h>
|
|
|
1356 #endif
|
|
|
1357
|
|
|
1358 __ptr_t
|
|
|
1359 memalign (alignment, size)
|
|
|
1360 __malloc_size_t alignment;
|
|
|
1361 __malloc_size_t size;
|
|
|
1362 {
|
|
|
1363 __ptr_t result;
|
|
|
1364 unsigned long int adj;
|
|
|
1365
|
|
|
1366 size = ((size + alignment - 1) / alignment) * alignment;
|
|
|
1367
|
|
|
1368 result = malloc (size);
|
|
|
1369 if (result == NULL)
|
|
|
1370 return NULL;
|
|
|
1371 adj = (unsigned long int) ((unsigned long int) ((char *) result -
|
|
|
1372 (char *) NULL)) % alignment;
|
|
|
1373 if (adj != 0)
|
|
|
1374 {
|
|
|
1375 struct alignlist *l;
|
|
|
1376 for (l = _aligned_blocks; l != NULL; l = l->next)
|
|
|
1377 if (l->aligned == NULL)
|
|
|
1378 /* This slot is free. Use it. */
|
|
|
1379 break;
|
|
|
1380 if (l == NULL)
|
|
|
1381 {
|
|
|
1382 l = (struct alignlist *) malloc (sizeof (struct alignlist));
|
|
|
1383 if (l == NULL)
|
|
|
1384 {
|
|
|
1385 free (result);
|
|
|
1386 return NULL;
|
|
|
1387 }
|
|
|
1388 l->next = _aligned_blocks;
|
|
|
1389 _aligned_blocks = l;
|
|
|
1390 }
|
|
|
1391 l->exact = result;
|
|
|
1392 result = l->aligned = (char *) result + alignment - adj;
|
|
|
1393 }
|
|
|
1394
|
|
|
1395 return result;
|
|
|
1396 }
|
