Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 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 |
||
| 3 | * |
||
| 4 | * Copyright © 2007 Mozilla Corporation |
||
| 5 | * |
||
| 6 | * This library is free software; you can redistribute it and/or |
||
| 7 | * modify it either under the terms of the GNU Lesser General Public |
||
| 8 | * License version 2.1 as published by the Free Software Foundation |
||
| 9 | * (the "LGPL") or, at your option, under the terms of the Mozilla |
||
| 10 | * Public License Version 1.1 (the "MPL"). If you do not alter this |
||
| 11 | * notice, a recipient may use your version of this file under either |
||
| 12 | * the MPL or the LGPL. |
||
| 13 | * |
||
| 14 | * You should have received a copy of the LGPL along with this library |
||
| 15 | * in the file COPYING-LGPL-2.1; if not, write to the Free Software |
||
| 16 | * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA |
||
| 17 | * You should have received a copy of the MPL along with this library |
||
| 18 | * in the file COPYING-MPL-1.1 |
||
| 19 | * |
||
| 20 | * The contents of this file are subject to the Mozilla Public License |
||
| 21 | * Version 1.1 (the "License"); you may not use this file except in |
||
| 22 | * compliance with the License. You may obtain a copy of the License at |
||
| 23 | * http://www.mozilla.org/MPL/ |
||
| 24 | * |
||
| 25 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY |
||
| 26 | * OF ANY KIND, either express or implied. See the LGPL or the MPL for |
||
| 27 | * the specific language governing rights and limitations. |
||
| 28 | * |
||
| 29 | * The Original Code is the cairo graphics library. |
||
| 30 | * |
||
| 31 | * The Initial Developer of the Original Code is Mozilla Foundation |
||
| 32 | * |
||
| 33 | * Contributor(s): |
||
| 34 | * Vladimir Vukicevic |
||
| 35 | */ |
||
| 36 | |||
| 37 | #ifndef CAIRO_MALLOC_PRIVATE_H |
||
| 38 | #define CAIRO_MALLOC_PRIVATE_H |
||
| 39 | |||
| 40 | #include "cairo-wideint-private.h" |
||
| 41 | |||
| 42 | #if HAVE_MEMFAULT |
||
| 43 | #include |
||
| 44 | #define CAIRO_INJECT_FAULT() MEMFAULT_INJECT_FAULT() |
||
| 45 | #else |
||
| 46 | #define CAIRO_INJECT_FAULT() 0 |
||
| 47 | #endif |
||
| 48 | |||
| 49 | /** |
||
| 50 | * _cairo_malloc: |
||
| 51 | * @size: size in bytes |
||
| 52 | * |
||
| 53 | * Allocate @size memory using malloc(). |
||
| 54 | * The memory should be freed using free(). |
||
| 55 | * malloc is skipped, if 0 bytes are requested, and %NULL will be returned. |
||
| 56 | * |
||
| 57 | * Return value: A pointer to the newly allocated memory, or %NULL in |
||
| 58 | * case of malloc() failure or size is 0. |
||
| 59 | */ |
||
| 60 | |||
| 61 | #define _cairo_malloc(size) \ |
||
| 62 | ((size) ? malloc((unsigned) (size)) : NULL) |
||
| 63 | |||
| 64 | /** |
||
| 65 | * _cairo_malloc_ab: |
||
| 66 | * @n: number of elements to allocate |
||
| 67 | * @size: size of each element |
||
| 68 | * |
||
| 69 | * Allocates @n*@size memory using _cairo_malloc(), taking care to not |
||
| 70 | * overflow when doing the multiplication. Behaves much like |
||
| 71 | * calloc(), except that the returned memory is not set to zero. |
||
| 72 | * The memory should be freed using free(). |
||
| 73 | * |
||
| 74 | * @size should be a constant so that the compiler can optimize |
||
| 75 | * out a constant division. |
||
| 76 | * |
||
| 77 | * Return value: A pointer to the newly allocated memory, or %NULL in |
||
| 78 | * case of malloc() failure or overflow. |
||
| 79 | */ |
||
| 80 | |||
| 81 | #define _cairo_malloc_ab(a, size) \ |
||
| 82 | ((size) && (unsigned) (a) >= INT32_MAX / (unsigned) (size) ? NULL : \ |
||
| 83 | _cairo_malloc((unsigned) (a) * (unsigned) (size))) |
||
| 84 | |||
| 85 | /** |
||
| 86 | * _cairo_realloc_ab: |
||
| 87 | * @ptr: original pointer to block of memory to be resized |
||
| 88 | * @n: number of elements to allocate |
||
| 89 | * @size: size of each element |
||
| 90 | * |
||
| 91 | * Reallocates @ptr a block of @n*@size memory using realloc(), taking |
||
| 92 | * care to not overflow when doing the multiplication. The memory |
||
| 93 | * should be freed using free(). |
||
| 94 | * |
||
| 95 | * @size should be a constant so that the compiler can optimize |
||
| 96 | * out a constant division. |
||
| 97 | * |
||
| 98 | * Return value: A pointer to the newly allocated memory, or %NULL in |
||
| 99 | * case of realloc() failure or overflow (whereupon the original block |
||
| 100 | * of memory * is left untouched). |
||
| 101 | */ |
||
| 102 | |||
| 103 | #define _cairo_realloc_ab(ptr, a, size) \ |
||
| 104 | ((size) && (unsigned) (a) >= INT32_MAX / (unsigned) (size) ? NULL : \ |
||
| 105 | realloc(ptr, (unsigned) (a) * (unsigned) (size))) |
||
| 106 | |||
| 107 | /** |
||
| 108 | * _cairo_malloc_abc: |
||
| 109 | * @n: first factor of number of elements to allocate |
||
| 110 | * @b: second factor of number of elements to allocate |
||
| 111 | * @size: size of each element |
||
| 112 | * |
||
| 113 | * Allocates @n*@b*@size memory using _cairo_malloc(), taking care to not |
||
| 114 | * overflow when doing the multiplication. Behaves like |
||
| 115 | * _cairo_malloc_ab(). The memory should be freed using free(). |
||
| 116 | * |
||
| 117 | * @size should be a constant so that the compiler can optimize |
||
| 118 | * out a constant division. |
||
| 119 | * |
||
| 120 | * Return value: A pointer to the newly allocated memory, or %NULL in |
||
| 121 | * case of malloc() failure or overflow. |
||
| 122 | */ |
||
| 123 | |||
| 124 | #define _cairo_malloc_abc(a, b, size) \ |
||
| 125 | ((b) && (unsigned) (a) >= INT32_MAX / (unsigned) (b) ? NULL : \ |
||
| 126 | (size) && (unsigned) ((a)*(b)) >= INT32_MAX / (unsigned) (size) ? NULL : \ |
||
| 127 | _cairo_malloc((unsigned) (a) * (unsigned) (b) * (unsigned) (size))) |
||
| 128 | |||
| 129 | /** |
||
| 130 | * _cairo_malloc_ab_plus_c: |
||
| 131 | * @n: number of elements to allocate |
||
| 132 | * @size: size of each element |
||
| 133 | * @k: additional size to allocate |
||
| 134 | * |
||
| 135 | * Allocates @n*@ksize+@k memory using _cairo_malloc(), taking care to not |
||
| 136 | * overflow when doing the arithmetic. Behaves like |
||
| 137 | * _cairo_malloc_ab(). The memory should be freed using free(). |
||
| 138 | * |
||
| 139 | * Return value: A pointer to the newly allocated memory, or %NULL in |
||
| 140 | * case of malloc() failure or overflow. |
||
| 141 | */ |
||
| 142 | |||
| 143 | #define _cairo_malloc_ab_plus_c(n, size, k) \ |
||
| 144 | ((size) && (unsigned) (n) >= INT32_MAX / (unsigned) (size) ? NULL : \ |
||
| 145 | (unsigned) (k) >= INT32_MAX - (unsigned) (n) * (unsigned) (size) ? NULL : \ |
||
| 146 | _cairo_malloc((unsigned) (n) * (unsigned) (size) + (unsigned) (k))) |
||
| 147 | |||
| 148 | #endif /* CAIRO_MALLOC_PRIVATE_H */ |