simmel-bootloader/lib/sdk/components/libraries/hci/hci_mem_pool.h
hathach df71d3444d follow #1
seperate files from latest SDK (currently 14.2.0) from good old non-
secure bootloader sdk 11
2018-04-05 00:35:08 +07:00

169 lines
6.6 KiB
C

/**
* Copyright (c) 2013 - 2017, 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.
*
*/
/** @file
*
* @defgroup hci_mem_pool Memory pool
* @{
* @ingroup app_common
*
* @brief Memory pool implementation
*
* Memory pool implementation, based on circular buffer data structure, which supports asynchronous
* processing of RX data. The current default implementation supports 1 TX buffer and 4 RX buffers.
* The memory managed by the pool is allocated from static storage instead of heap. The internal
* design of the circular buffer implementing the RX memory layout is illustrated in the picture
* below.
*
* @image html memory_pool.svg "Circular buffer design"
*
* The expected call order for the RX APIs is as follows:
* - hci_mem_pool_rx_produce
* - hci_mem_pool_rx_data_size_set
* - hci_mem_pool_rx_extract
* - hci_mem_pool_rx_consume
*
* @warning If the above mentioned expected call order is violated the end result can be undefined.
*
* \par Component specific configuration options
*
* The following compile time configuration options are available to suit various implementations:
* - TX_BUF_SIZE TX buffer size in bytes.
* - RX_BUF_SIZE RX buffer size in bytes.
* - RX_BUF_QUEUE_SIZE RX buffer element size.
*/
#ifndef HCI_MEM_POOL_H__
#define HCI_MEM_POOL_H__
#include <stdint.h>
#include "nrf_error.h"
#ifdef __cplusplus
extern "C" {
#endif
/**@brief Function for opening the module.
*
* @retval NRF_SUCCESS Operation success.
*/
uint32_t hci_mem_pool_open(void);
/**@brief Function for closing the module.
*
* @retval NRF_SUCCESS Operation success.
*/
uint32_t hci_mem_pool_close(void);
/**@brief Function for allocating requested amount of TX memory.
*
* @param[out] pp_buffer Pointer to the allocated memory.
*
* @retval NRF_SUCCESS Operation success. Memory was allocated.
* @retval NRF_ERROR_NO_MEM Operation failure. No memory available for allocation.
* @retval NRF_ERROR_NULL Operation failure. NULL pointer supplied.
*/
uint32_t hci_mem_pool_tx_alloc(void ** pp_buffer);
/**@brief Function for freeing previously allocated TX memory.
*
* @note Memory management follows the FIFO principle meaning that free() order must match the
* alloc(...) order, which is the reason for omitting exact memory block identifier as an
* input parameter.
*
* @retval NRF_SUCCESS Operation success. Memory was freed.
*/
uint32_t hci_mem_pool_tx_free(void);
/**@brief Function for producing a free RX memory block for usage.
*
* @note Upon produce request amount being 0, NRF_SUCCESS is returned.
*
* @param[in] length Amount, in bytes, of free memory to be produced.
* @param[out] pp_buffer Pointer to the allocated memory.
*
* @retval NRF_SUCCESS Operation success. Free RX memory block produced.
* @retval NRF_ERROR_NO_MEM Operation failure. No suitable memory available for allocation.
* @retval NRF_ERROR_DATA_SIZE Operation failure. Request size exceeds limit.
* @retval NRF_ERROR_NULL Operation failure. NULL pointer supplied.
*/
uint32_t hci_mem_pool_rx_produce(uint32_t length, void ** pp_buffer);
/**@brief Function for setting the length of the last produced RX memory block.
*
* @warning If call to this API is omitted the end result is that the following call to
* mem_pool_rx_extract will return incorrect data in the p_length output parameter.
*
* @param[in] length Amount, in bytes, of actual memory used.
*
* @retval NRF_SUCCESS Operation success. Length was set.
*/
uint32_t hci_mem_pool_rx_data_size_set(uint32_t length);
/**@brief Function for extracting a packet, which has been filled with read data, for further
* processing.
*
* @param[out] pp_buffer Pointer to the packet data.
* @param[out] p_length Length of packet data in bytes.
*
* @retval NRF_SUCCESS Operation success.
* @retval NRF_ERROR_NO_MEM Operation failure. No packet available to extract.
* @retval NRF_ERROR_NULL Operation failure. NULL pointer supplied.
*/
uint32_t hci_mem_pool_rx_extract(uint8_t ** pp_buffer, uint32_t * p_length);
/**@brief Function for freeing previously extracted packet, which has been filled with read data.
*
* @param[in] p_buffer Pointer to consumed buffer.
*
* @retval NRF_SUCCESS Operation success.
* @retval NRF_ERROR_NO_MEM Operation failure. No packet available to free.
* @retval NRF_ERROR_INVALID_ADDR Operation failure. Not a valid pointer.
*/
uint32_t hci_mem_pool_rx_consume(uint8_t * p_buffer);
#ifdef __cplusplus
}
#endif
#endif // HCI_MEM_POOL_H__
/** @} */