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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#pragma once
#ifdef HAVE_STDNORETURN_H
#include <stdnoreturn.h>
#elif HAVE_FUNC_ATTRIBUTE_NORETURN
#define noreturn __attribute__((noreturn))
#else
#define noreturn
#endif
#if HAVE_FUNC_ATTRIBUTE_RETURNS_NONNULL
#define ISC_ATTR_RETURNS_NONNULL __attribute__((returns_nonnull))
#else
#define ISC_ATTR_RETURNS_NONNULL
#endif
#ifdef HAVE_FUNC_ATTRIBUTE_MALLOC
/*
* Indicates that a function is malloc-like, i.e., that the
* pointer P returned by the function cannot alias any other
* pointer valid when the function returns.
*/
#define ISC_ATTR_MALLOC __attribute__((malloc))
#if HAVE_MALLOC_EXT_ATTR
/*
* Associates deallocator as a suitable deallocation function
* for pointers returned from the function marked with the attribute.
*/
#define ISC_ATTR_DEALLOCATOR(deallocator) __attribute__((malloc(deallocator)))
/*
* Similar to ISC_ATTR_DEALLOCATOR, but allows to speficy an index "idx",
* which denotes the positional argument to which when the pointer is passed
* in calls to deallocator has the effect of deallocating it.
*/
#define ISC_ATTR_DEALLOCATOR_IDX(deallocator, idx) \
__attribute__((malloc(deallocator, idx)))
/*
* Combines both ISC_ATTR_MALLOC and ISC_ATTR_DEALLOCATOR attributes.
*/
#define ISC_ATTR_MALLOC_DEALLOCATOR(deallocator) \
__attribute__((malloc, malloc(deallocator)))
/*
* Similar to ISC_ATTR_MALLOC_DEALLOCATOR, but allows to speficy an index "idx",
* which denotes the positional argument to which when the pointer is passed
* in calls to deallocator has the effect of deallocating it.
*/
#define ISC_ATTR_MALLOC_DEALLOCATOR_IDX(deallocator, idx) \
__attribute__((malloc, malloc(deallocator, idx)))
#else /* #ifdef HAVE_MALLOC_EXT_ATTR */
/*
* There is support for malloc attribute but not for
* extended attributes, so macros that combine attribute malloc
* with a deallocator will only expand to malloc attribute.
*/
#define ISC_ATTR_DEALLOCATOR(deallocator)
#define ISC_ATTR_DEALLOCATOR_IDX(deallocator, idx)
#define ISC_ATTR_MALLOC_DEALLOCATOR(deallocator) ISC_ATTR_MALLOC
#define ISC_ATTR_MALLOC_DEALLOCATOR_IDX(deallocator, idx) ISC_ATTR_MALLOC
#endif
#else /* #ifdef HAVE_FUNC_ATTRIBUTE_MALLOC */
/*
* There is no support for malloc attribute.
*/
#define ISC_ATTR_MALLOC
#define ISC_ATTR_DEALLOCATOR(deallocator)
#define ISC_ATTR_DEALLOCATOR_IDX(deallocator, idx)
#define ISC_ATTR_MALLOC_DEALLOCATOR(deallocator)
#define ISC_ATTR_MALLOC_DEALLOCATOR_IDX(deallocator, idx)
#endif /* HAVE_FUNC_ATTRIBUTE_MALLOC */
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