186 lines
6.8 KiB
C
186 lines
6.8 KiB
C
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/**
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* Copyright (c) 2018 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef NRF_CRYPTO_MEM_H__
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#define NRF_CRYPTO_MEM_H__
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/** @file
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*
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* @defgroup nrf_crypto_mem Dynamic memory management module
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* @{
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* @ingroup nrf_crypto
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*
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* @brief Module to manage dynamically allocated memory used by nrf_crypto APIs.
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*
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* @ref NRF_CRYPTO_ALLOCATOR definition is used to configure this module.
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*/
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#include <stdint.h>
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#include "sdk_common.h"
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#include "sdk_config.h"
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#include "nrf_crypto_types.h"
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#include "sdk_alloca.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef __SDK_DOXYGEN__
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#define NRF_CRYPTO_ALLOCATOR_DEFAULT 0 /**< @internal @brief Value for NRF_CRYPTO_ALLOCATOR to select default memory allocation. */
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#define NRF_CRYPTO_ALLOCATOR_USER 1 /**< @internal @brief Value for NRF_CRYPTO_ALLOCATOR to select user defined memory allocation. */
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#define NRF_CRYPTO_ALLOCATOR_ALLOCA 2 /**< @internal @brief Value for NRF_CRYPTO_ALLOCATOR to select stack based memory allocation. */
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#define NRF_CRYPTO_ALLOCATOR_MALLOC 3 /**< @internal @brief Value for NRF_CRYPTO_ALLOCATOR to select stdlib's dynamic memory allocation. */
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#define NRF_CRYPTO_ALLOCATOR_NRF_MALLOC 4 /**< @internal @brief Value for NRF_CRYPTO_ALLOCATOR to select mem_manager for memory allocation. */
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#ifndef NRF_CRYPTO_ALLOCATOR
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#define NRF_CRYPTO_ALLOCATOR NRF_CRYPTO_ALLOCATOR_DEFAULT
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#endif
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#if NRF_CRYPTO_ALLOCATOR == NRF_CRYPTO_ALLOCATOR_DEFAULT
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#undef NRF_CRYPTO_ALLOCATOR
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#if SDK_ALLOCA_DEFINED && !NRF_MODULE_ENABLED(NRF_CRYPTO_BACKEND_MBEDTLS)
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#define NRF_CRYPTO_ALLOCATOR NRF_CRYPTO_ALLOCATOR_ALLOCA
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#else
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#define NRF_CRYPTO_ALLOCATOR NRF_CRYPTO_ALLOCATOR_NRF_MALLOC
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#endif
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#endif
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#if NRF_CRYPTO_ALLOCATOR == NRF_CRYPTO_ALLOCATOR_USER
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#include "nrf_crypto_allocator.h"
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#ifndef NRF_CRYPTO_ALLOC
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#error "User defined allocator for nrf_crypto does not define NRF_CRYPTO_ALLOC"
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#endif
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#ifndef NRF_CRYPTO_FREE
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#error "User defined allocator for nrf_crypto does not define NRF_CRYPTO_FREE"
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#endif
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#ifndef NRF_CRYPTO_ALLOC_ON_STACK
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#error "User defined allocator for nrf_crypto does not define NRF_CRYPTO_ALLOC_ON_STACK"
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#endif
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#elif NRF_CRYPTO_ALLOCATOR == NRF_CRYPTO_ALLOCATOR_ALLOCA
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#if !SDK_ALLOCA_DEFINED
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#warning "Stack based allocation is selected, but alloca() is not supported on this platform"
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#endif
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#define NRF_CRYPTO_ALLOC(size) (alloca((size_t)(size)))
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#define NRF_CRYPTO_FREE(p_buffer) // Empty
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#define NRF_CRYPTO_ALLOC_ON_STACK 1
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#elif NRF_CRYPTO_ALLOCATOR == NRF_CRYPTO_ALLOCATOR_MALLOC
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#include "stdlib.h"
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#define NRF_CRYPTO_ALLOC(size) (malloc((size_t)(size)))
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#define NRF_CRYPTO_FREE(p_buffer) (free((void *)(p_buffer)))
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#define NRF_CRYPTO_ALLOC_ON_STACK 0
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#elif NRF_CRYPTO_ALLOCATOR == NRF_CRYPTO_ALLOCATOR_NRF_MALLOC
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#include "mem_manager.h"
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#define NRF_CRYPTO_ALLOC(size) (nrf_malloc((uint32_t)(size)))
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#define NRF_CRYPTO_FREE(p_buffer) (nrf_free((void *)(p_buffer)))
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#define NRF_CRYPTO_ALLOC_ON_STACK 0
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#else
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#error "Invalid NRF_CRYPTO_ALLOCATOR configuration value"
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#endif
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#else // __SDK_DOXYGEN__
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/** @brief Defines memory allocation function for nrf_crypto.
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*
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* This macro is used internally by nrf_crypto library to allocate temporary memory. It is not
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* intended to be used outside nrf_crypto library. How memory is actually allocated is configured
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* by @ref NRF_CRYPTO_ALLOCATOR definition.
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*
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* If user macros are selected by @ref NRF_CRYPTO_ALLOCATOR then this macro have to be defined by
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* the user in "nrf_crypto_allocator.h" file. The file will be included into "nrf_crypto_mem.h".
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*
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* If @ref NRF_CRYPTO_ALLOC_ON_STACK is 1 then this function will allocate data on stack,
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* so make sure that returned pointer is not used outside the caller function.
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*
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* @param size Number of bytes to allocate.
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* @returns Pointer to newly allocated memory or NULL on error.
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*/
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#define NRF_CRYPTO_ALLOC(size)
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/** @brief Defines memory deallocation function for nrf_crypto.
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*
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* This macro is used internally by nrf_crypto library to deallocate temporary memory. It is not
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* intended to be used outside nrf_crypto library.
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*
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* If user macros are selected by @ref NRF_CRYPTO_ALLOCATOR then this macro have to be defined by
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* the user in "nrf_crypto_allocator.h" file. The file will be included into "nrf_crypto_mem.h".
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*
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* @param p_buffer Pointer to memory buffer for deallocation.
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*/
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#define NRF_CRYPTO_FREE(p_buffer)
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/** @brief Contains 1 if memory allocated by @ref NRF_CRYPTO_ALLOC is on stack or 0 otherwise.
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*
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* This definition is used internally by nrf_crypto library. It is not intended to be used outside
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* nrf_crypto library.
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*
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* If user macros are selected by @ref NRF_CRYPTO_ALLOCATOR then this macro have to be defined by
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* the user in "nrf_crypto_allocator.h" file. The file will be included into "nrf_crypto_mem.h".
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*/
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#define NRF_CRYPTO_ALLOC_ON_STACK
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#endif // __SDK_DOXYGEN__
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#ifdef __cplusplus
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}
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#endif
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/**@} */
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#endif // NRF_CRYPTO_MEM_H__
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