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1 /***************************************************************************/ |
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2 /* */ |
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3 /* ftmemory.h */ |
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4 /* */ |
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5 /* The FreeType memory management macros (specification). */ |
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6 /* */ |
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7 /* Copyright 1996-2001, 2002, 2004, 2005, 2006 by */ |
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8 /* David Turner, Robert Wilhelm, and Werner Lemberg */ |
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9 /* */ |
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10 /* This file is part of the FreeType project, and may only be used, */ |
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11 /* modified, and distributed under the terms of the FreeType project */ |
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12 /* license, FTL.TXT. By continuing to use, modify, or distribute */ |
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13 /* this file you indicate that you have read the license and */ |
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14 /* understand and accept it fully. */ |
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15 /* */ |
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16 /***************************************************************************/ |
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17 |
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18 |
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19 #ifndef __FTMEMORY_H__ |
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20 #define __FTMEMORY_H__ |
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21 |
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22 |
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23 #include <ft2build.h> |
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24 #include FT_CONFIG_CONFIG_H |
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25 #include FT_TYPES_H |
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26 |
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27 |
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28 FT_BEGIN_HEADER |
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29 |
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30 |
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31 /*************************************************************************/ |
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32 /* */ |
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33 /* <Macro> */ |
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34 /* FT_SET_ERROR */ |
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35 /* */ |
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36 /* <Description> */ |
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37 /* This macro is used to set an implicit `error' variable to a given */ |
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38 /* expression's value (usually a function call), and convert it to a */ |
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39 /* boolean which is set whenever the value is != 0. */ |
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40 /* */ |
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41 #undef FT_SET_ERROR |
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42 #define FT_SET_ERROR( expression ) \ |
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43 ( ( error = (expression) ) != 0 ) |
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44 |
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45 |
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46 |
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47 /*************************************************************************/ |
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48 /*************************************************************************/ |
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49 /*************************************************************************/ |
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50 /**** ****/ |
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51 /**** ****/ |
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52 /**** M E M O R Y ****/ |
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53 /**** ****/ |
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54 /**** ****/ |
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55 /*************************************************************************/ |
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56 /*************************************************************************/ |
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57 /*************************************************************************/ |
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58 |
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59 |
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60 /* |
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61 * C++ refuses to handle statements like p = (void*)anything; where `p' |
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62 * is a typed pointer. Since we don't have a `typeof' operator in |
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63 * standard C++, we have to use ugly casts. |
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64 */ |
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65 |
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66 #ifdef __cplusplus |
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67 #define FT_ASSIGNP( p, val ) *((void**)&(p)) = (val) |
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68 #else |
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69 #define FT_ASSIGNP( p, val ) (p) = (val) |
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70 #endif |
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71 |
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72 |
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73 |
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74 #ifdef FT_DEBUG_MEMORY |
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75 |
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76 FT_BASE( const char* ) _ft_debug_file; |
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77 FT_BASE( long ) _ft_debug_lineno; |
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78 |
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79 #define FT_DEBUG_INNER( exp ) ( _ft_debug_file = __FILE__, \ |
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80 _ft_debug_lineno = __LINE__, \ |
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81 (exp) ) |
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82 |
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83 #define FT_ASSIGNP_INNER( p, exp ) ( _ft_debug_file = __FILE__, \ |
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84 _ft_debug_lineno = __LINE__, \ |
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85 FT_ASSIGNP( p, exp ) ) |
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86 |
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87 #else /* !FT_DEBUG_MEMORY */ |
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88 |
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89 #define FT_DEBUG_INNER( exp ) (exp) |
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90 #define FT_ASSIGNP_INNER( p, exp ) FT_ASSIGNP( p, exp ) |
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91 |
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92 #endif /* !FT_DEBUG_MEMORY */ |
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93 |
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94 |
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95 /* |
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96 * The allocation functions return a pointer, and the error code |
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97 * is written to through the `p_error' parameter. See below for |
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98 * for documentation. |
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99 */ |
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100 |
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101 FT_BASE( FT_Pointer ) |
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102 ft_mem_alloc( FT_Memory memory, |
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103 FT_Long size, |
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104 FT_Error *p_error ); |
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105 |
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106 FT_BASE( FT_Pointer ) |
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107 ft_mem_qalloc( FT_Memory memory, |
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108 FT_Long size, |
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109 FT_Error *p_error ); |
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110 |
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111 FT_BASE( FT_Pointer ) |
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112 ft_mem_realloc( FT_Memory memory, |
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113 FT_Long item_size, |
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114 FT_Long cur_count, |
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115 FT_Long new_count, |
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116 void* block, |
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117 FT_Error *p_error ); |
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118 |
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119 FT_BASE( FT_Pointer ) |
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120 ft_mem_qrealloc( FT_Memory memory, |
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121 FT_Long item_size, |
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122 FT_Long cur_count, |
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123 FT_Long new_count, |
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124 void* block, |
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125 FT_Error *p_error ); |
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126 |
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127 FT_BASE( void ) |
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128 ft_mem_free( FT_Memory memory, |
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129 const void* P ); |
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130 |
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131 |
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132 #define FT_MEM_ALLOC( ptr, size ) \ |
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133 FT_ASSIGNP_INNER( ptr, ft_mem_alloc( memory, (size), &error ) ) |
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134 |
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135 #define FT_MEM_FREE( ptr ) \ |
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136 FT_BEGIN_STMNT \ |
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137 ft_mem_free( memory, (ptr) ); \ |
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138 (ptr) = NULL; \ |
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139 FT_END_STMNT |
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140 |
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141 #define FT_MEM_NEW( ptr ) \ |
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142 FT_MEM_ALLOC( ptr, sizeof ( *(ptr) ) ) |
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143 |
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144 #define FT_MEM_REALLOC( ptr, cursz, newsz ) \ |
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145 FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, 1, \ |
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146 (cursz), (newsz), \ |
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147 (ptr), &error ) ) |
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148 |
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149 #define FT_MEM_QALLOC( ptr, size ) \ |
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150 FT_ASSIGNP_INNER( ptr, ft_mem_qalloc( memory, (size), &error ) ) |
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151 |
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152 #define FT_MEM_QNEW( ptr ) \ |
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153 FT_MEM_QALLOC( ptr, sizeof ( *(ptr) ) ) |
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154 |
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155 #define FT_MEM_QREALLOC( ptr, cursz, newsz ) \ |
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156 FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, 1, \ |
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157 (cursz), (newsz), \ |
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158 (ptr), &error ) ) |
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159 |
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160 #define FT_MEM_QRENEW_ARRAY( ptr, cursz, newsz ) \ |
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161 FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, sizeof ( *(ptr) ), \ |
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162 (cursz), (newsz), \ |
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163 (ptr), &error ) ) |
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164 |
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165 #define FT_MEM_ALLOC_MULT( ptr, count, item_size ) \ |
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166 FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, (item_size), \ |
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167 0, (count), \ |
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168 NULL, &error ) ) |
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169 |
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170 #define FT_MEM_REALLOC_MULT( ptr, oldcnt, newcnt, itmsz ) \ |
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171 FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, (itmsz), \ |
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172 (oldcnt), (newcnt), \ |
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173 (ptr), &error ) ) |
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174 |
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175 #define FT_MEM_QALLOC_MULT( ptr, count, item_size ) \ |
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176 FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, (item_size), \ |
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177 0, (count), \ |
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178 NULL, &error ) ) |
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179 |
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180 #define FT_MEM_QREALLOC_MULT( ptr, oldcnt, newcnt, itmsz) \ |
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181 FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, (itmsz), \ |
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182 (oldcnt), (newcnt), \ |
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183 (ptr), &error ) ) |
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184 |
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185 |
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186 #define FT_MEM_SET_ERROR( cond ) ( (cond), error != 0 ) |
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187 |
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188 |
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189 #define FT_MEM_SET( dest, byte, count ) ft_memset( dest, byte, count ) |
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190 |
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191 #define FT_MEM_COPY( dest, source, count ) ft_memcpy( dest, source, count ) |
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192 |
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193 #define FT_MEM_MOVE( dest, source, count ) ft_memmove( dest, source, count ) |
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194 |
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195 |
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196 #define FT_MEM_ZERO( dest, count ) FT_MEM_SET( dest, 0, count ) |
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197 |
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198 #define FT_ZERO( p ) FT_MEM_ZERO( p, sizeof ( *(p) ) ) |
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199 |
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200 |
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201 #define FT_ARRAY_ZERO( dest, count ) \ |
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202 FT_MEM_ZERO( dest, (count) * sizeof ( *(dest) ) ) |
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203 |
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204 #define FT_ARRAY_COPY( dest, source, count ) \ |
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205 FT_MEM_COPY( dest, source, (count) * sizeof ( *(dest) ) ) |
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206 |
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207 #define FT_ARRAY_MOVE( dest, source, count ) \ |
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208 FT_MEM_MOVE( dest, source, (count) * sizeof ( *(dest) ) ) |
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209 |
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210 |
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211 /* |
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212 * Return the maximum number of adressable elements in an array. |
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213 * We limit ourselves to INT_MAX, rather than UINT_MAX, to avoid |
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214 * any problems. |
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215 */ |
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216 #define FT_ARRAY_MAX( ptr ) ( FT_INT_MAX / sizeof ( *(ptr) ) ) |
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217 |
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218 #define FT_ARRAY_CHECK( ptr, count ) ( (count) <= FT_ARRAY_MAX( ptr ) ) |
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219 |
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220 |
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221 /*************************************************************************/ |
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222 /* */ |
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223 /* The following functions macros expect that their pointer argument is */ |
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224 /* _typed_ in order to automatically compute array element sizes. */ |
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225 /* */ |
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226 |
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227 #define FT_MEM_NEW_ARRAY( ptr, count ) \ |
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228 FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, sizeof ( *(ptr) ), \ |
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229 0, (count), \ |
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230 NULL, &error ) ) |
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231 |
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232 #define FT_MEM_RENEW_ARRAY( ptr, cursz, newsz ) \ |
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233 FT_ASSIGNP_INNER( ptr, ft_mem_realloc( memory, sizeof ( *(ptr) ), \ |
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234 (cursz), (newsz), \ |
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235 (ptr), &error ) ) |
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236 |
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237 #define FT_MEM_QNEW_ARRAY( ptr, count ) \ |
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238 FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, sizeof ( *(ptr) ), \ |
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239 0, (count), \ |
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240 NULL, &error ) ) |
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241 |
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242 #define FT_MEM_QRENEW_ARRAY( ptr, cursz, newsz ) \ |
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243 FT_ASSIGNP_INNER( ptr, ft_mem_qrealloc( memory, sizeof ( *(ptr) ), \ |
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244 (cursz), (newsz), \ |
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245 (ptr), &error ) ) |
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246 |
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247 |
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248 #define FT_ALLOC( ptr, size ) \ |
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249 FT_MEM_SET_ERROR( FT_MEM_ALLOC( ptr, size ) ) |
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250 |
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251 #define FT_REALLOC( ptr, cursz, newsz ) \ |
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252 FT_MEM_SET_ERROR( FT_MEM_REALLOC( ptr, cursz, newsz ) ) |
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253 |
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254 #define FT_ALLOC_MULT( ptr, count, item_size ) \ |
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255 FT_MEM_SET_ERROR( FT_MEM_ALLOC_MULT( ptr, count, item_size ) ) |
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256 |
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257 #define FT_REALLOC_MULT( ptr, oldcnt, newcnt, itmsz ) \ |
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258 FT_MEM_SET_ERROR( FT_MEM_REALLOC_MULT( ptr, oldcnt, \ |
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259 newcnt, itmsz ) ) |
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260 |
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261 #define FT_QALLOC( ptr, size ) \ |
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262 FT_MEM_SET_ERROR( FT_MEM_QALLOC( ptr, size ) ) |
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263 |
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264 #define FT_QREALLOC( ptr, cursz, newsz ) \ |
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265 FT_MEM_SET_ERROR( FT_MEM_QREALLOC( ptr, cursz, newsz ) ) |
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266 |
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267 #define FT_QALLOC_MULT( ptr, count, item_size ) \ |
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268 FT_MEM_SET_ERROR( FT_MEM_QALLOC_MULT( ptr, count, item_size ) ) |
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269 |
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270 #define FT_QREALLOC_MULT( ptr, oldcnt, newcnt, itmsz ) \ |
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271 FT_MEM_SET_ERROR( FT_MEM_QREALLOC_MULT( ptr, oldcnt, \ |
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272 newcnt, itmsz ) ) |
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273 |
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274 #define FT_FREE( ptr ) FT_MEM_FREE( ptr ) |
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275 |
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276 #define FT_NEW( ptr ) FT_MEM_SET_ERROR( FT_MEM_NEW( ptr ) ) |
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277 |
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278 #define FT_NEW_ARRAY( ptr, count ) \ |
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279 FT_MEM_SET_ERROR( FT_MEM_NEW_ARRAY( ptr, count ) ) |
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280 |
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281 #define FT_RENEW_ARRAY( ptr, curcnt, newcnt ) \ |
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282 FT_MEM_SET_ERROR( FT_MEM_RENEW_ARRAY( ptr, curcnt, newcnt ) ) |
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283 |
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284 #define FT_QNEW( ptr ) \ |
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285 FT_MEM_SET_ERROR( FT_MEM_QNEW( ptr ) ) |
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286 |
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287 #define FT_QNEW_ARRAY( ptr, count ) \ |
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288 FT_MEM_SET_ERROR( FT_MEM_NEW_ARRAY( ptr, count ) ) |
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289 |
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290 #define FT_QRENEW_ARRAY( ptr, curcnt, newcnt ) \ |
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291 FT_MEM_SET_ERROR( FT_MEM_RENEW_ARRAY( ptr, curcnt, newcnt ) ) |
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292 |
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293 |
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294 #ifdef FT_CONFIG_OPTION_OLD_INTERNALS |
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295 |
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296 FT_BASE( FT_Error ) |
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297 FT_Alloc( FT_Memory memory, |
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298 FT_Long size, |
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299 void* *P ); |
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300 |
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301 FT_BASE( FT_Error ) |
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302 FT_QAlloc( FT_Memory memory, |
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303 FT_Long size, |
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304 void* *p ); |
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305 |
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306 FT_BASE( FT_Error ) |
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307 FT_Realloc( FT_Memory memory, |
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308 FT_Long current, |
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309 FT_Long size, |
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310 void* *P ); |
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311 |
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312 FT_BASE( FT_Error ) |
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313 FT_QRealloc( FT_Memory memory, |
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314 FT_Long current, |
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315 FT_Long size, |
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316 void* *p ); |
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317 |
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318 FT_BASE( void ) |
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319 FT_Free( FT_Memory memory, |
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320 void* *P ); |
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321 |
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322 #endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ |
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323 |
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324 |
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325 /* */ |
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326 |
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327 |
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328 FT_END_HEADER |
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329 |
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330 #endif /* __FTMEMORY_H__ */ |
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331 |
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332 |
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333 /* END */ |