/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */ /* Cairo - a vector graphics library with display and print output * * Copyright © 2007 Mozilla Corporation * * This library is free software; you can redistribute it and/or * modify it either under the terms of the GNU Lesser General Public * License version 2.1 as published by the Free Software Foundation * (the "LGPL") or, at your option, under the terms of the Mozilla * Public License Version 1.1 (the "MPL"). If you do not alter this * notice, a recipient may use your version of this file under either * the MPL or the LGPL. * * You should have received a copy of the LGPL along with this library * in the file COPYING-LGPL-2.1; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA * You should have received a copy of the MPL along with this library * in the file COPYING-MPL-1.1 * * The contents of this file are subject to the Mozilla Public License * Version 1.1 (the "License"); you may not use this file except in * compliance with the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY * OF ANY KIND, either express or implied. See the LGPL or the MPL for * the specific language governing rights and limitations. * * The Original Code is the cairo graphics library. * * The Initial Developer of the Original Code is Mozilla Foundation * * Contributor(s): * Vladimir Vukicevic <vladimir@pobox.com> */ #ifndef CAIRO_MALLOC_PRIVATE_H #define CAIRO_MALLOC_PRIVATE_H #include "cairo-wideint-private.h" #if HAVE_MEMFAULT #include <memfault.h> #define CAIRO_INJECT_FAULT() MEMFAULT_INJECT_FAULT() #else #define CAIRO_INJECT_FAULT() 0 #endif /** * _cairo_malloc: * @size: size in bytes * * Allocate @size memory using malloc(). * The memory should be freed using free(). * malloc is skipped, if 0 bytes are requested, and %NULL will be returned. * * Return value: A pointer to the newly allocated memory, or %NULL in * case of malloc() failure or size is 0. */ #define _cairo_malloc(size) \ ((size) ? malloc((unsigned) (size)) : NULL) /** * _cairo_malloc_ab: * @n: number of elements to allocate * @size: size of each element * * Allocates @n*@size memory using _cairo_malloc(), taking care to not * overflow when doing the multiplication. Behaves much like * calloc(), except that the returned memory is not set to zero. * The memory should be freed using free(). * * @size should be a constant so that the compiler can optimize * out a constant division. * * Return value: A pointer to the newly allocated memory, or %NULL in * case of malloc() failure or overflow. */ #define _cairo_malloc_ab(a, size) \ ((size) && (unsigned) (a) >= INT32_MAX / (unsigned) (size) ? NULL : \ _cairo_malloc((unsigned) (a) * (unsigned) (size))) /** * _cairo_realloc_ab: * @ptr: original pointer to block of memory to be resized * @n: number of elements to allocate * @size: size of each element * * Reallocates @ptr a block of @n*@size memory using realloc(), taking * care to not overflow when doing the multiplication. The memory * should be freed using free(). * * @size should be a constant so that the compiler can optimize * out a constant division. * * Return value: A pointer to the newly allocated memory, or %NULL in * case of realloc() failure or overflow (whereupon the original block * of memory * is left untouched). */ #define _cairo_realloc_ab(ptr, a, size) \ ((size) && (unsigned) (a) >= INT32_MAX / (unsigned) (size) ? NULL : \ realloc(ptr, (unsigned) (a) * (unsigned) (size))) /** * _cairo_malloc_abc: * @n: first factor of number of elements to allocate * @b: second factor of number of elements to allocate * @size: size of each element * * Allocates @n*@b*@size memory using _cairo_malloc(), taking care to not * overflow when doing the multiplication. Behaves like * _cairo_malloc_ab(). The memory should be freed using free(). * * @size should be a constant so that the compiler can optimize * out a constant division. * * Return value: A pointer to the newly allocated memory, or %NULL in * case of malloc() failure or overflow. */ #define _cairo_malloc_abc(a, b, size) \ ((b) && (unsigned) (a) >= INT32_MAX / (unsigned) (b) ? NULL : \ (size) && (unsigned) ((a)*(b)) >= INT32_MAX / (unsigned) (size) ? NULL : \ _cairo_malloc((unsigned) (a) * (unsigned) (b) * (unsigned) (size))) /** * _cairo_malloc_ab_plus_c: * @n: number of elements to allocate * @size: size of each element * @k: additional size to allocate * * Allocates @n*@ksize+@k memory using _cairo_malloc(), taking care to not * overflow when doing the arithmetic. Behaves like * _cairo_malloc_ab(). The memory should be freed using free(). * * Return value: A pointer to the newly allocated memory, or %NULL in * case of malloc() failure or overflow. */ #define _cairo_malloc_ab_plus_c(n, size, k) \ ((size) && (unsigned) (n) >= INT32_MAX / (unsigned) (size) ? NULL : \ (unsigned) (k) >= INT32_MAX - (unsigned) (n) * (unsigned) (size) ? NULL : \ _cairo_malloc((unsigned) (n) * (unsigned) (size) + (unsigned) (k))) #endif /* CAIRO_MALLOC_PRIVATE_H */