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1892 | serge | 1 | /* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */ |
2 | /* Cairo - a vector graphics library with display and print output |
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3 | * |
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4 | * Copyright © 2007 Mozilla Corporation |
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5 | * |
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6 | * This library is free software; you can redistribute it and/or |
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7 | * modify it either under the terms of the GNU Lesser General Public |
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8 | * License version 2.1 as published by the Free Software Foundation |
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9 | * (the "LGPL") or, at your option, under the terms of the Mozilla |
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10 | * Public License Version 1.1 (the "MPL"). If you do not alter this |
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11 | * notice, a recipient may use your version of this file under either |
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12 | * the MPL or the LGPL. |
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13 | * |
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14 | * You should have received a copy of the LGPL along with this library |
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15 | * in the file COPYING-LGPL-2.1; if not, write to the Free Software |
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16 | * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA |
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17 | * You should have received a copy of the MPL along with this library |
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18 | * in the file COPYING-MPL-1.1 |
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19 | * |
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20 | * The contents of this file are subject to the Mozilla Public License |
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21 | * Version 1.1 (the "License"); you may not use this file except in |
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22 | * compliance with the License. You may obtain a copy of the License at |
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23 | * http://www.mozilla.org/MPL/ |
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24 | * |
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25 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY |
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26 | * OF ANY KIND, either express or implied. See the LGPL or the MPL for |
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27 | * the specific language governing rights and limitations. |
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28 | * |
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29 | * The Original Code is the cairo graphics library. |
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30 | * |
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31 | * The Initial Developer of the Original Code is Mozilla Foundation |
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32 | * |
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33 | * Contributor(s): |
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34 | * Vladimir Vukicevic |
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35 | */ |
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36 | |||
37 | #ifndef CAIRO_MALLOC_PRIVATE_H |
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38 | #define CAIRO_MALLOC_PRIVATE_H |
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39 | |||
40 | #include "cairo-wideint-private.h" |
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3959 | Serge | 41 | #include |
1892 | serge | 42 | |
43 | #if HAVE_MEMFAULT |
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44 | #include |
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45 | #define CAIRO_INJECT_FAULT() MEMFAULT_INJECT_FAULT() |
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46 | #else |
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47 | #define CAIRO_INJECT_FAULT() 0 |
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48 | #endif |
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49 | |||
50 | /** |
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51 | * _cairo_malloc: |
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52 | * @size: size in bytes |
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53 | * |
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54 | * Allocate @size memory using malloc(). |
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55 | * The memory should be freed using free(). |
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56 | * malloc is skipped, if 0 bytes are requested, and %NULL will be returned. |
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57 | * |
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58 | * Return value: A pointer to the newly allocated memory, or %NULL in |
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59 | * case of malloc() failure or size is 0. |
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3959 | Serge | 60 | **/ |
1892 | serge | 61 | |
62 | #define _cairo_malloc(size) \ |
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63 | ((size) ? malloc((unsigned) (size)) : NULL) |
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64 | |||
65 | /** |
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66 | * _cairo_malloc_ab: |
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3959 | Serge | 67 | * @a: number of elements to allocate |
1892 | serge | 68 | * @size: size of each element |
69 | * |
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3959 | Serge | 70 | * Allocates @a*@size memory using _cairo_malloc(), taking care to not |
1892 | serge | 71 | * overflow when doing the multiplication. Behaves much like |
72 | * calloc(), except that the returned memory is not set to zero. |
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73 | * The memory should be freed using free(). |
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74 | * |
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75 | * @size should be a constant so that the compiler can optimize |
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76 | * out a constant division. |
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77 | * |
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78 | * Return value: A pointer to the newly allocated memory, or %NULL in |
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79 | * case of malloc() failure or overflow. |
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3959 | Serge | 80 | **/ |
1892 | serge | 81 | |
82 | #define _cairo_malloc_ab(a, size) \ |
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83 | ((size) && (unsigned) (a) >= INT32_MAX / (unsigned) (size) ? NULL : \ |
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84 | _cairo_malloc((unsigned) (a) * (unsigned) (size))) |
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85 | |||
86 | /** |
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87 | * _cairo_realloc_ab: |
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88 | * @ptr: original pointer to block of memory to be resized |
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3959 | Serge | 89 | * @a: number of elements to allocate |
1892 | serge | 90 | * @size: size of each element |
91 | * |
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3959 | Serge | 92 | * Reallocates @ptr a block of @a*@size memory using realloc(), taking |
1892 | serge | 93 | * care to not overflow when doing the multiplication. The memory |
94 | * should be freed using free(). |
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95 | * |
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96 | * @size should be a constant so that the compiler can optimize |
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97 | * out a constant division. |
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98 | * |
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99 | * Return value: A pointer to the newly allocated memory, or %NULL in |
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100 | * case of realloc() failure or overflow (whereupon the original block |
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101 | * of memory * is left untouched). |
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3959 | Serge | 102 | **/ |
1892 | serge | 103 | |
104 | #define _cairo_realloc_ab(ptr, a, size) \ |
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105 | ((size) && (unsigned) (a) >= INT32_MAX / (unsigned) (size) ? NULL : \ |
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106 | realloc(ptr, (unsigned) (a) * (unsigned) (size))) |
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107 | |||
108 | /** |
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109 | * _cairo_malloc_abc: |
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3959 | Serge | 110 | * @a: first factor of number of elements to allocate |
1892 | serge | 111 | * @b: second factor of number of elements to allocate |
112 | * @size: size of each element |
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113 | * |
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3959 | Serge | 114 | * Allocates @a*@b*@size memory using _cairo_malloc(), taking care to not |
1892 | serge | 115 | * overflow when doing the multiplication. Behaves like |
116 | * _cairo_malloc_ab(). The memory should be freed using free(). |
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117 | * |
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118 | * @size should be a constant so that the compiler can optimize |
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119 | * out a constant division. |
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120 | * |
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121 | * Return value: A pointer to the newly allocated memory, or %NULL in |
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122 | * case of malloc() failure or overflow. |
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3959 | Serge | 123 | **/ |
1892 | serge | 124 | |
125 | #define _cairo_malloc_abc(a, b, size) \ |
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126 | ((b) && (unsigned) (a) >= INT32_MAX / (unsigned) (b) ? NULL : \ |
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127 | (size) && (unsigned) ((a)*(b)) >= INT32_MAX / (unsigned) (size) ? NULL : \ |
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128 | _cairo_malloc((unsigned) (a) * (unsigned) (b) * (unsigned) (size))) |
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129 | |||
130 | /** |
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131 | * _cairo_malloc_ab_plus_c: |
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3959 | Serge | 132 | * @a: number of elements to allocate |
1892 | serge | 133 | * @size: size of each element |
3959 | Serge | 134 | * @c: additional size to allocate |
1892 | serge | 135 | * |
3959 | Serge | 136 | * Allocates @a*@size+@c memory using _cairo_malloc(), taking care to not |
137 | * overflow when doing the arithmetic. Behaves similar to |
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1892 | serge | 138 | * _cairo_malloc_ab(). The memory should be freed using free(). |
139 | * |
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140 | * Return value: A pointer to the newly allocated memory, or %NULL in |
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141 | * case of malloc() failure or overflow. |
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3959 | Serge | 142 | **/ |
1892 | serge | 143 | |
3959 | Serge | 144 | #define _cairo_malloc_ab_plus_c(a, size, c) \ |
145 | ((size) && (unsigned) (a) >= INT32_MAX / (unsigned) (size) ? NULL : \ |
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146 | (unsigned) (c) >= INT32_MAX - (unsigned) (a) * (unsigned) (size) ? NULL : \ |
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147 | _cairo_malloc((unsigned) (a) * (unsigned) (size) + (unsigned) (c))) |
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1892 | serge | 148 | |
149 | #endif /* CAIRO_MALLOC_PRIVATE_H */ |