1 | /* Prototypes and definition for malloc implementation. |
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2 | Copyright (C) 1996, 1997, 1999, 2000 Free Software Foundation, Inc. |
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3 | This file is part of the GNU C Library. |
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4 | |
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5 | The GNU C Library is free software; you can redistribute it and/or |
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6 | modify it under the terms of the GNU Lesser General Public |
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7 | License as published by the Free Software Foundation; either |
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8 | version 2.1 of the License, or (at your option) any later version. |
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9 | |
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10 | The GNU C Library is distributed in the hope that it will be useful, |
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11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 | Lesser General Public License for more details. |
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14 | |
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15 | You should have received a copy of the GNU Lesser General Public |
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16 | License along with the GNU C Library; if not, write to the Free |
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17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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18 | 02111-1307 USA. */ |
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19 | |
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20 | #ifndef _MALLOC_H |
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21 | #define _MALLOC_H 1 |
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22 | |
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23 | #include <features.h> |
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24 | |
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25 | /* |
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26 | `ptmalloc', a malloc implementation for multiple threads without |
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27 | lock contention, by Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>. |
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28 | See the files `ptmalloc.c' or `COPYRIGHT' for copying conditions. |
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29 | |
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30 | VERSION 2.6.4-pt Wed Dec 4 00:35:54 MET 1996 |
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31 | |
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32 | This work is mainly derived from malloc-2.6.4 by Doug Lea |
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33 | <dl@cs.oswego.edu>, which is available from: |
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34 | |
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35 | ftp://g.oswego.edu/pub/misc/malloc.c |
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36 | |
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37 | This trimmed-down header file only provides function prototypes and |
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38 | the exported data structures. For more detailed function |
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39 | descriptions and compile-time options, see the source file |
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40 | `ptmalloc.c'. |
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41 | */ |
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42 | |
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43 | #if defined(__STDC__) || defined (__cplusplus) |
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44 | # include <stddef.h> |
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45 | # define __malloc_ptr_t void * |
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46 | #else |
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47 | # undef size_t |
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48 | # define size_t unsigned int |
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49 | # undef ptrdiff_t |
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50 | # define ptrdiff_t int |
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51 | # define __malloc_ptr_t char * |
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52 | #endif |
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53 | |
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54 | #ifdef _LIBC |
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55 | /* Used by GNU libc internals. */ |
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56 | # define __malloc_size_t size_t |
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57 | # define __malloc_ptrdiff_t ptrdiff_t |
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58 | #elif !defined __attribute_malloc__ |
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59 | # define __attribute_malloc__ |
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60 | #endif |
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61 | |
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62 | #ifdef __GNUC__ |
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63 | |
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64 | /* GCC can always grok prototypes. For C++ programs we add throw() |
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65 | to help it optimize the function calls. But this works only with |
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66 | gcc 2.8.x and egcs. */ |
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67 | # if defined __cplusplus && (__GNUC__ >= 3 || __GNUC_MINOR__ >= 8) |
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68 | # define __THROW throw () |
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69 | # else |
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70 | # define __THROW |
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71 | # endif |
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72 | # define __MALLOC_P(args) args __THROW |
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73 | /* This macro will be used for functions which might take C++ callback |
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74 | functions. */ |
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75 | # define __MALLOC_PMT(args) args |
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76 | |
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77 | #else /* Not GCC. */ |
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78 | |
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79 | # define __THROW |
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80 | |
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81 | # if (defined __STDC__ && __STDC__) || defined __cplusplus |
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82 | |
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83 | # define __MALLOC_P(args) args |
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84 | # define __MALLOC_PMT(args) args |
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85 | |
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86 | # else /* Not ANSI C or C++. */ |
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87 | |
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88 | # define __MALLOC_P(args) () /* No prototypes. */ |
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89 | # define __MALLOC_PMT(args) () |
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90 | |
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91 | # endif /* ANSI C or C++. */ |
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92 | |
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93 | #endif /* GCC. */ |
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94 | |
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95 | #ifndef NULL |
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96 | # ifdef __cplusplus |
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97 | # define NULL 0 |
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98 | # else |
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99 | # define NULL ((__malloc_ptr_t) 0) |
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100 | # endif |
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101 | #endif |
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102 | |
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103 | #ifdef __cplusplus |
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104 | extern "C" { |
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105 | #endif |
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106 | |
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107 | struct _reent; |
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108 | |
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109 | /* Nonzero if the malloc is already initialized. */ |
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110 | #ifdef _LIBC |
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111 | /* In the GNU libc we rename the global variable |
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112 | `__malloc_initialized' to `__libc_malloc_initialized'. */ |
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113 | # define __malloc_initialized __libc_malloc_initialized |
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114 | #endif |
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115 | extern int __malloc_initialized; |
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116 | |
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117 | /* Initialize global configuration. Not needed with GNU libc. */ |
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118 | #ifndef __GLIBC__ |
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119 | extern void ptmalloc_init __MALLOC_P ((void)); |
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120 | #endif |
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121 | |
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122 | /* Allocate SIZE bytes of memory. */ |
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123 | extern __malloc_ptr_t malloc __MALLOC_P ((size_t __size)) __attribute_malloc__; |
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124 | extern __malloc_ptr_t _malloc_r __MALLOC_P ((struct _reent * __r, size_t __size)) __attribute_malloc__; |
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125 | |
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126 | /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */ |
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127 | extern __malloc_ptr_t calloc __MALLOC_P ((size_t __nmemb, size_t __size)) |
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128 | __attribute_malloc__; |
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129 | extern __malloc_ptr_t _calloc_r __MALLOC_P ((struct _reent * __r, |
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130 | size_t __nmemb, size_t __size)) |
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131 | __attribute_malloc__; |
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132 | |
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133 | /* Re-allocate the previously allocated block in __ptr, making the new |
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134 | block SIZE bytes long. */ |
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135 | extern __malloc_ptr_t realloc __MALLOC_P ((__malloc_ptr_t __ptr, |
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136 | size_t __size)) |
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137 | __attribute_malloc__; |
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138 | extern __malloc_ptr_t _realloc_r __MALLOC_P ((struct _reent * __r, |
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139 | __malloc_ptr_t __ptr, |
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140 | size_t __size)) |
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141 | __attribute_malloc__; |
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142 | |
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143 | /* Free a block allocated by `malloc', `realloc' or `calloc'. */ |
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144 | extern void free __MALLOC_P ((__malloc_ptr_t __ptr)); |
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145 | extern void _free_r __MALLOC_P ((struct _reent * __r, __malloc_ptr_t __ptr)); |
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146 | |
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147 | /* Free a block allocated by `calloc'. */ |
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148 | extern void cfree __MALLOC_P ((__malloc_ptr_t __ptr)); |
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149 | |
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150 | /* Allocate SIZE bytes allocated to ALIGNMENT bytes. */ |
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151 | extern __malloc_ptr_t memalign __MALLOC_P ((size_t __alignment, size_t __size)); |
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152 | extern __malloc_ptr_t _memalign_r __MALLOC_P ((struct _reent *__r, |
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153 | size_t __alignment, |
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154 | size_t __size)); |
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155 | |
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156 | /* Allocate SIZE bytes on a page boundary. */ |
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157 | extern __malloc_ptr_t valloc __MALLOC_P ((size_t __size)) __attribute_malloc__; |
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158 | extern __malloc_ptr_t _valloc_r __MALLOC_P ((struct _reent *__r, |
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159 | size_t __size)) |
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160 | __attribute_malloc__; |
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161 | |
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162 | /* Equivalent to valloc(minimum-page-that-holds(n)), that is, round up |
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163 | __size to nearest pagesize. */ |
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164 | extern __malloc_ptr_t pvalloc __MALLOC_P ((size_t __size)) |
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165 | __attribute_malloc__; |
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166 | extern __malloc_ptr_t _pvalloc_r __MALLOC_P ((struct _reent *__r, |
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167 | size_t __size)) |
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168 | __attribute_malloc__; |
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169 | |
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170 | /* Underlying allocation function; successive calls should return |
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171 | contiguous pieces of memory. */ |
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172 | extern __malloc_ptr_t (*__morecore) __MALLOC_PMT ((ptrdiff_t __size)); |
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173 | |
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174 | /* Default value of `__morecore'. */ |
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175 | extern __malloc_ptr_t __default_morecore __MALLOC_P ((ptrdiff_t __size)) |
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176 | __attribute_malloc__; |
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177 | |
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178 | /* SVID2/XPG mallinfo structure */ |
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179 | struct mallinfo { |
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180 | int arena; /* total space allocated from system */ |
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181 | int ordblks; /* number of non-inuse chunks */ |
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182 | int smblks; /* unused -- always zero */ |
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183 | int hblks; /* number of mmapped regions */ |
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184 | int hblkhd; /* total space in mmapped regions */ |
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185 | int usmblks; /* unused -- always zero */ |
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186 | int fsmblks; /* unused -- always zero */ |
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187 | int uordblks; /* total allocated space */ |
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188 | int fordblks; /* total non-inuse space */ |
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189 | int keepcost; /* top-most, releasable (via malloc_trim) space */ |
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190 | }; |
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191 | |
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192 | /* Returns a copy of the updated current mallinfo. */ |
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193 | extern struct mallinfo mallinfo __MALLOC_P ((void)); |
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194 | extern struct mallinfo _mallinfo_r __MALLOC_P ((struct _reent *__r)); |
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195 | |
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196 | /* SVID2/XPG mallopt options */ |
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197 | #ifndef M_MXFAST |
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198 | # define M_MXFAST 1 /* UNUSED in this malloc */ |
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199 | #endif |
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200 | #ifndef M_NLBLKS |
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201 | # define M_NLBLKS 2 /* UNUSED in this malloc */ |
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202 | #endif |
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203 | #ifndef M_GRAIN |
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204 | # define M_GRAIN 3 /* UNUSED in this malloc */ |
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205 | #endif |
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206 | #ifndef M_KEEP |
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207 | # define M_KEEP 4 /* UNUSED in this malloc */ |
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208 | #endif |
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209 | |
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210 | /* mallopt options that actually do something */ |
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211 | #define M_TRIM_THRESHOLD -1 |
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212 | #define M_TOP_PAD -2 |
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213 | #define M_MMAP_THRESHOLD -3 |
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214 | #define M_MMAP_MAX -4 |
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215 | #define M_CHECK_ACTION -5 |
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216 | |
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217 | /* General SVID/XPG interface to tunable parameters. */ |
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218 | extern int mallopt __MALLOC_P ((int __param, int __val)); |
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219 | extern int _mallopt_r __MALLOC_P ((struct _reent *__r, int __param, int __val)); |
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220 | |
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221 | /* Release all but __pad bytes of freed top-most memory back to the |
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222 | system. Return 1 if successful, else 0. */ |
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223 | extern int malloc_trim __MALLOC_P ((size_t __pad)); |
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224 | |
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225 | /* Report the number of usable allocated bytes associated with allocated |
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226 | chunk __ptr. */ |
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227 | extern size_t malloc_usable_size __MALLOC_P ((__malloc_ptr_t __ptr)); |
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228 | |
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229 | /* Prints brief summary statistics on stderr. */ |
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230 | extern void malloc_stats __MALLOC_P ((void)); |
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231 | extern void _malloc_stats_r __MALLOC_P ((struct _reent *__r)); |
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232 | |
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233 | /* Record the state of all malloc variables in an opaque data structure. */ |
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234 | extern __malloc_ptr_t malloc_get_state __MALLOC_P ((void)); |
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235 | |
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236 | /* Restore the state of all malloc variables from data obtained with |
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237 | malloc_get_state(). */ |
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238 | extern int malloc_set_state __MALLOC_P ((__malloc_ptr_t __ptr)); |
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239 | |
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240 | #if defined __GLIBC__ || defined MALLOC_HOOKS |
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241 | /* Called once when malloc is initialized; redefining this variable in |
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242 | the application provides the preferred way to set up the hook |
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243 | pointers. */ |
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244 | extern void (*__malloc_initialize_hook) __MALLOC_PMT ((void)); |
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245 | /* Hooks for debugging and user-defined versions. */ |
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246 | extern void (*__free_hook) __MALLOC_PMT ((__malloc_ptr_t __ptr, |
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247 | __const __malloc_ptr_t)); |
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248 | extern __malloc_ptr_t (*__malloc_hook) __MALLOC_PMT ((size_t __size, |
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249 | __const __malloc_ptr_t)); |
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250 | extern __malloc_ptr_t (*__realloc_hook) __MALLOC_PMT ((__malloc_ptr_t __ptr, |
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251 | size_t __size, |
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252 | __const __malloc_ptr_t)); |
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253 | extern __malloc_ptr_t (*__memalign_hook) __MALLOC_PMT ((size_t __alignment, |
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254 | size_t __size, |
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255 | __const __malloc_ptr_t)); |
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256 | extern void (*__after_morecore_hook) __MALLOC_PMT ((void)); |
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257 | |
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258 | /* Activate a standard set of debugging hooks. */ |
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259 | extern void __malloc_check_init __MALLOC_P ((void)); |
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260 | #endif |
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261 | |
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262 | #ifdef __cplusplus |
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263 | }; /* end of extern "C" */ |
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264 | #endif |
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265 | |
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266 | #endif /* malloc.h */ |
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