/** * Copyright (c) 2016 - 2018, Nordic Semiconductor ASA * * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form, except as embedded into a Nordic * Semiconductor ASA integrated circuit in a product or a software update for * such product, must reproduce the above copyright notice, this list of * conditions and the following disclaimer in the documentation and/or other * materials provided with the distribution. * * 3. Neither the name of Nordic Semiconductor ASA nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * 4. This software, with or without modification, must only be used with a * Nordic Semiconductor ASA integrated circuit. * * 5. Any software provided in binary form under this license must not be reverse * engineered, decompiled, modified and/or disassembled. * * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ /** * @defgroup nrf_balloc Block memory allocator * @{ * @ingroup app_common * @brief This module handles block memory allocator features. */ #ifndef NRF_BALLOC_H__ #define NRF_BALLOC_H__ #ifdef __cplusplus extern "C" { #endif #include "sdk_errors.h" #include "sdk_config.h" #include "app_util_platform.h" #include "app_util.h" #include "nrf_log_instance.h" #include "nrf_section.h" /** @brief Name of the module used for logger messaging. */ #define NRF_BALLOC_LOG_NAME balloc #if NRF_BALLOC_CONFIG_DEBUG_ENABLED || NRF_BALLOC_CLI_CMDS #define NRF_BALLOC_HAS_NAME 1 #else #define NRF_BALLOC_HAS_NAME 0 #endif /**@defgroup NRF_BALLOC_DEBUG Macros for preparing debug flags for block allocator module. * @{ */ #define NRF_BALLOC_DEBUG_HEAD_GUARD_WORDS_SET(words) (((words) & 0xFF) << 0) #define NRF_BALLOC_DEBUG_HEAD_GUARD_WORDS_GET(flags) (((flags) >> 0) & 0xFF) #define NRF_BALLOC_DEBUG_TAIL_GUARD_WORDS_SET(words) (((words) & 0xFF) << 8) #define NRF_BALLOC_DEBUG_TAIL_GUARD_WORDS_GET(flags) (((flags) >> 8) & 0xFF) #define NRF_BALLOC_DEBUG_BASIC_CHECKS_SET(enable) (!!(enable) << 16) #define NRF_BALLOC_DEBUG_BASIC_CHECKS_GET(flags) (flags & (1 << 16)) #define NRF_BALLOC_DEBUG_DOUBLE_FREE_CHECK_SET(enable) (!!(enable) << 17) #define NRF_BALLOC_DEBUG_DOUBLE_FREE_CHECK_GET(flags) (flags & (1 << 17)) #define NRF_BALLOC_DEBUG_DATA_TRASHING_CHECK_SET(enable) (!!(enable) << 18) #define NRF_BALLOC_DEBUG_DATA_TRASHING_CHECK_GET(flags) (flags & (1 << 18)) /**@} */ /**@brief Default debug flags for @ref nrf_balloc. This is used by the @ref NRF_BALLOC_DEF macro. * Flags can be changed in @ref sdk_config. */ #if NRF_BALLOC_CONFIG_DEBUG_ENABLED #define NRF_BALLOC_DEFAULT_DEBUG_FLAGS \ ( \ NRF_BALLOC_DEBUG_HEAD_GUARD_WORDS_SET(NRF_BALLOC_CONFIG_HEAD_GUARD_WORDS) | \ NRF_BALLOC_DEBUG_TAIL_GUARD_WORDS_SET(NRF_BALLOC_CONFIG_TAIL_GUARD_WORDS) | \ NRF_BALLOC_DEBUG_BASIC_CHECKS_SET(NRF_BALLOC_CONFIG_BASIC_CHECKS_ENABLED) | \ NRF_BALLOC_DEBUG_DOUBLE_FREE_CHECK_SET(NRF_BALLOC_CONFIG_DOUBLE_FREE_CHECK_ENABLED) | \ NRF_BALLOC_DEBUG_DATA_TRASHING_CHECK_SET(NRF_BALLOC_CONFIG_DATA_TRASHING_CHECK_ENABLED) \ ) #else #define NRF_BALLOC_DEFAULT_DEBUG_FLAGS 0 #endif // NRF_BALLOC_CONFIG_DEBUG_ENABLED /**@brief Block memory allocator control block.*/ typedef struct { uint8_t * p_stack_pointer; //!< Current allocation stack pointer. uint8_t max_utilization; //!< Maximum utilization of the memory pool. } nrf_balloc_cb_t; /**@brief Block memory allocator pool instance. The pool is made of elements of the same size. */ typedef struct { nrf_balloc_cb_t * p_cb; //!< Pointer to the instance control block. uint8_t * p_stack_base; //!< Base of the allocation stack. /**< * Stack is used to store handlers to not allocated elements. */ uint8_t * p_stack_limit; //!< Maximum possible value of the allocation stack pointer. void * p_memory_begin; //!< Pointer to the start of the memory pool. /**< * Memory is used as a heap for blocks. */ NRF_LOG_INSTANCE_PTR_DECLARE(p_log) //!< Pointer to instance of the logger object (Conditionally compiled). #if NRF_BALLOC_HAS_NAME const char * p_name; //!< Pointer to string with pool name. #endif #if NRF_BALLOC_CONFIG_DEBUG_ENABLED uint32_t debug_flags; //!< Debugging settings. /**< * Debug flag should be created by @ref NRF_BALLOC_DEBUG. */ #endif // NRF_BALLOC_CONFIG_DEBUG_ENABLED uint16_t block_size; //!< Size of the allocated block (including debug overhead). /**< * Single block contains user element with header and tail * words. */ } nrf_balloc_t; /**@brief Get total memory consumed by single block (element size with overhead caused by debug * flags). * * @param[in] _element_size Size of an element. * @param[in] _debug_flags Debug flags. */ #if NRF_BALLOC_CONFIG_DEBUG_ENABLED #define NRF_BALLOC_BLOCK_SIZE(_element_size, _debug_flags) \ ( \ (sizeof(uint32_t) * NRF_BALLOC_DEBUG_HEAD_GUARD_WORDS_GET(_debug_flags)) + \ ALIGN_NUM(sizeof(uint32_t), (_element_size)) + \ (sizeof(uint32_t) * NRF_BALLOC_DEBUG_TAIL_GUARD_WORDS_GET(_debug_flags)) \ ) #else #define NRF_BALLOC_BLOCK_SIZE(_element_size, _debug_flags) \ ALIGN_NUM(sizeof(uint32_t), (_element_size)) #endif // NRF_BALLOC_CONFIG_DEBUG_ENABLED /**@brief Get element size ( excluding debugging overhead is present) * flags). * * @param[in] _p_balloc Pointer to balloc instance. */ #if NRF_BALLOC_CONFIG_DEBUG_ENABLED #define NRF_BALLOC_ELEMENT_SIZE(_p_balloc) \ (ALIGN_NUM(sizeof(uint32_t), (_p_balloc)->block_size) - \ ((sizeof(uint32_t) * NRF_BALLOC_DEBUG_HEAD_GUARD_WORDS_GET((_p_balloc)->debug_flags)) + \ (sizeof(uint32_t) * NRF_BALLOC_DEBUG_TAIL_GUARD_WORDS_GET((_p_balloc)->debug_flags)))) #else #define NRF_BALLOC_ELEMENT_SIZE(_p_balloc) \ (_p_balloc)->block_size #endif // NRF_BALLOC_CONFIG_DEBUG_ENABLED #if NRF_BALLOC_CONFIG_DEBUG_ENABLED #define __NRF_BALLOC_ASSIGN_DEBUG_FLAGS(_debug_flags) .debug_flags = (_debug_flags), #else #define __NRF_BALLOC_ASSIGN_DEBUG_FLAGS(_debug_flags) #endif #if NRF_BALLOC_HAS_NAME #define __NRF_BALLOC_ASSIGN_POOL_NAME(_name) .p_name = STRINGIFY(_name), #else #define __NRF_BALLOC_ASSIGN_POOL_NAME(_name) #endif /**@brief Create a block allocator instance with custom debug flags. * * @note This macro reserves memory for the given block allocator instance. * * @param[in] _name Name of the allocator. * @param[in] _element_size Size of one element. * @param[in] _pool_size Size of the pool. * @param[in] _debug_flags Debug flags (@ref NRF_BALLOC_DEBUG). */ #define NRF_BALLOC_DBG_DEF(_name, _element_size, _pool_size, _debug_flags) \ STATIC_ASSERT((_pool_size) <= UINT8_MAX); \ static uint8_t CONCAT_2(_name, _nrf_balloc_pool_stack)[(_pool_size)]; \ static uint32_t CONCAT_2(_name,_nrf_balloc_pool_mem) \ [NRF_BALLOC_BLOCK_SIZE(_element_size, _debug_flags) * (_pool_size) / sizeof(uint32_t)]; \ static nrf_balloc_cb_t CONCAT_2(_name,_nrf_balloc_cb); \ NRF_LOG_INSTANCE_REGISTER(NRF_BALLOC_LOG_NAME, _name, \ NRF_BALLOC_CONFIG_INFO_COLOR, \ NRF_BALLOC_CONFIG_DEBUG_COLOR, \ NRF_BALLOC_CONFIG_INITIAL_LOG_LEVEL, \ NRF_BALLOC_CONFIG_LOG_ENABLED ? \ NRF_BALLOC_CONFIG_LOG_LEVEL : NRF_LOG_SEVERITY_NONE); \ NRF_SECTION_ITEM_REGISTER(nrf_balloc, const nrf_balloc_t _name) = \ { \ .p_cb = &CONCAT_2(_name,_nrf_balloc_cb), \ .p_stack_base = CONCAT_2(_name,_nrf_balloc_pool_stack), \ .p_stack_limit = CONCAT_2(_name,_nrf_balloc_pool_stack) + (_pool_size), \ .p_memory_begin = CONCAT_2(_name,_nrf_balloc_pool_mem), \ .block_size = NRF_BALLOC_BLOCK_SIZE(_element_size, _debug_flags), \ \ NRF_LOG_INSTANCE_PTR_INIT(p_log, NRF_BALLOC_LOG_NAME, _name) \ __NRF_BALLOC_ASSIGN_POOL_NAME(_name) \ __NRF_BALLOC_ASSIGN_DEBUG_FLAGS(_debug_flags) \ } /**@brief Create a block allocator instance. * * @note This macro reserves memory for the given block allocator instance. * * @param[in] _name Name of the allocator. * @param[in] _element_size Size of one element. * @param[in] _pool_size Size of the pool. */ #define NRF_BALLOC_DEF(_name, _element_size, _pool_size) \ NRF_BALLOC_DBG_DEF(_name, _element_size, _pool_size, NRF_BALLOC_DEFAULT_DEBUG_FLAGS) /**@brief Create a block allocator interface. * * @param[in] _type Type which is allocated. * @param[in] _name Name of the allocator. */ #define NRF_BALLOC_INTERFACE_DEC(_type, _name) \ _type * CONCAT_2(_name,_alloc)(void); \ void CONCAT_2(_name,_free)(_type * p_element) /**@brief Define a custom block allocator interface. * * @param[in] _attr Function attribute that will be added to allocator function definition. * @param[in] _type Type which is allocated. * @param[in] _name Name of the allocator. * @param[in] _p_pool Pool from which data will be allocated. */ #define NRF_BALLOC_INTERFACE_CUSTOM_DEF(_attr, _type, _name, _p_pool) \ _attr _type * CONCAT_2(_name,_alloc)(void) \ { \ GCC_PRAGMA("GCC diagnostic push") \ GCC_PRAGMA("GCC diagnostic ignored \"-Waddress\"") \ ASSERT((_p_pool) != NULL); \ ASSERT((_p_pool)->block_size >= \ NRF_BALLOC_BLOCK_SIZE(sizeof(_type), (_p_pool)->debug_flags)); \ GCC_PRAGMA("GCC diagnostic pop") \ return (_type *)(nrf_balloc_alloc(_p_pool)); \ } \ \ _attr void CONCAT_2(_name,_free)(_type * p_element) \ { \ GCC_PRAGMA("GCC diagnostic push") \ GCC_PRAGMA("GCC diagnostic ignored \"-Waddress\"") \ ASSERT((_p_pool) != NULL); \ ASSERT((_p_pool)->block_size >= \ NRF_BALLOC_BLOCK_SIZE(sizeof(_type), (_p_pool)->debug_flags)); \ GCC_PRAGMA("GCC diagnostic pop") \ nrf_balloc_free((_p_pool), p_element); \ } /**@brief Define block allocator interface. * * @param[in] _type Type which is allocated. * @param[in] _name Name of the allocator. * @param[in] _p_pool Pool from which data will be allocated. */ #define NRF_BALLOC_INTERFACE_DEF(_type, _name, _p_pool) \ NRF_BALLOC_INTERFACE_CUSTOM_DEF(/* empty */, _type, _name, _p_pool) /**@brief Define a local block allocator interface. * * @param[in] _type Type which is allocated. * @param[in] _name Name of the allocator. * @param[in] _p_pool Pool from which data will be allocated. */ #define NRF_BALLOC_INTERFACE_LOCAL_DEF(_type, _name, _p_pool) \ NRF_BALLOC_INTERFACE_CUSTOM_DEF(static, _type, _name, _p_pool) /**@brief Function for initializing a block memory allocator pool. * * @param[out] p_pool Pointer to the pool that is to be initialized. * * @return NRF_SUCCESS on success, otherwise error code. */ ret_code_t nrf_balloc_init(nrf_balloc_t const * p_pool); /**@brief Function for allocating an element from the pool. * * @note This module guarantees that the returned memory is aligned to 4. * * @param[in] p_pool Pointer to the memory pool from which the element will be allocated. * * @return Allocated element or NULL if the specified pool is empty. */ void * nrf_balloc_alloc(nrf_balloc_t const * p_pool); /**@brief Function for freeing an element back to the pool. * * @param[in] p_pool Pointer to the memory pool. * @param[in] p_element Element to be freed. */ void nrf_balloc_free(nrf_balloc_t const * p_pool, void * p_element); /**@brief Function for getting maximum memory pool utilization. * * @param[in] p_pool Pointer to the memory pool instance. * * @return Maximum number of elements allocated from the pool. */ __STATIC_INLINE uint8_t nrf_balloc_max_utilization_get(nrf_balloc_t const * p_pool); #ifndef SUPPRESS_INLINE_IMPLEMENTATION __STATIC_INLINE uint8_t nrf_balloc_max_utilization_get(nrf_balloc_t const * p_pool) { ASSERT(p_pool != NULL); return p_pool->p_cb->max_utilization; } #endif //SUPPRESS_INLINE_IMPLEMENTATION /**@brief Function for getting current memory pool utilization. * * @param[in] p_pool Pointer to the memory pool instance. * * @return Maximum number of elements allocated from the pool. */ __STATIC_INLINE uint8_t nrf_balloc_utilization_get(nrf_balloc_t const * p_pool); #ifndef SUPPRESS_INLINE_IMPLEMENTATION __STATIC_INLINE uint8_t nrf_balloc_utilization_get(nrf_balloc_t const * p_pool) { ASSERT(p_pool != NULL); return (p_pool->p_stack_limit - p_pool->p_cb->p_stack_pointer); } #endif //SUPPRESS_INLINE_IMPLEMENTATION #ifdef __cplusplus } #endif #endif // NRF_BALLOC_H__ /** @} */