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Diffstat (limited to 'libs/cairo-1.16.0/src/cairo-malloc-private.h')
| -rw-r--r-- | libs/cairo-1.16.0/src/cairo-malloc-private.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/src/cairo-malloc-private.h b/libs/cairo-1.16.0/src/cairo-malloc-private.h new file mode 100644 index 0000000..570f7cb --- /dev/null +++ b/libs/cairo-1.16.0/src/cairo-malloc-private.h @@ -0,0 +1,149 @@ +/* -*- 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" +#include <stdlib.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) > 0 ? malloc((unsigned) (size)) : NULL) + +/** + * _cairo_malloc_ab: + * @a: number of elements to allocate + * @size: size of each element + * + * Allocates @a*@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 + * @a: number of elements to allocate + * @size: size of each element + * + * Reallocates @ptr a block of @a*@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: + * @a: first factor of number of elements to allocate + * @b: second factor of number of elements to allocate + * @size: size of each element + * + * Allocates @a*@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: + * @a: number of elements to allocate + * @size: size of each element + * @c: additional size to allocate + * + * Allocates @a*@size+@c memory using _cairo_malloc(), taking care to not + * overflow when doing the arithmetic. Behaves similar to + * _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(a, size, c) \ + ((size) && (unsigned) (a) >= INT32_MAX / (unsigned) (size) ? NULL : \ + (unsigned) (c) >= INT32_MAX - (unsigned) (a) * (unsigned) (size) ? NULL : \ + _cairo_malloc((unsigned) (a) * (unsigned) (size) + (unsigned) (c))) + +#endif /* CAIRO_MALLOC_PRIVATE_H */ |