forked from KolibriOS/kolibrios
149 lines
5.2 KiB
C
149 lines
5.2 KiB
C
/* -*- 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 */
|