Nordic stack and drivers for the mbed BLE API
Dependents: BLE_ANCS_SDAPI BLE_temperature BLE_HeartRate writable_gatt ... more
Diff: TARGET_MCU_NRF51822/sdk/source/ble/peer_manager/peer_database.h
- Revision:
- 638:c90ae1400bf2
diff -r f7faad332abc -r c90ae1400bf2 TARGET_MCU_NRF51822/sdk/source/ble/peer_manager/peer_database.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TARGET_MCU_NRF51822/sdk/source/ble/peer_manager/peer_database.h Wed Sep 14 14:39:43 2016 +0100 @@ -0,0 +1,354 @@ +/* + * Copyright (c) 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 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 other + * contributors to this software may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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. + * + */ + + +#ifndef PEER_DATABASE_H__ +#define PEER_DATABASE_H__ + +#include <stdint.h> +#include "peer_manager_types.h" +#include "sdk_errors.h" + +/** + * @defgroup peer_database Peer Database + * @ingroup peer_manager + * @{ + * @brief An internal module of @ref peer_manager. A module for simple management of reading and + * writing of peer data into persistent storage. + * + */ + +#define PDB_WRITE_BUF_SIZE (sizeof(pm_peer_data_bonding_t)) + +/**@brief Events that can come from the peer_database module. + */ +typedef enum +{ + PDB_EVT_WRITE_BUF_STORED, /**< A pdb_write_buf_store operation has completed successfully. */ + PDB_EVT_RAW_STORED, /**< A pdb_raw_store operation has completed successfully. */ + PDB_EVT_RAW_STORE_FAILED, /**< A pdb_raw_store operation has failed. */ + PDB_EVT_CLEARED, /**< A pdb_clear operation has completed successfully. */ + PDB_EVT_CLEAR_FAILED, /**< A pdb_clear operation has failed. */ + PDB_EVT_COMPRESSED, /**< A compress procedure has completed. */ + PDB_EVT_ERROR_NO_MEM, /**< An operation is blocked because the flash is full. It will be reattempted automatically after the next compress procedure. */ + PDB_EVT_ERROR_UNEXPECTED, /**< An unexpected error occurred. This is a fatal error. */ +} pdb_evt_id_t; + +/**@brief Events that can come from the peer_database module. + */ +typedef struct +{ + pdb_evt_id_t evt_id; /**< The event that has happened. */ + pm_peer_id_t peer_id; /**< The id of the peer the event pertains to. */ + pm_peer_data_id_t data_id; /**< The data the event pertains to. */ + union + { + struct + { + pm_store_token_t store_token; /**< A token identifying the store operation this event pertains to. */ + } raw_stored_evt; + struct + { + pm_store_token_t store_token; /**< A token identifying the store operation this event pertains to. */ + } error_raw_store_evt; + } params; +} pdb_evt_t; + +/**@brief Event handler for events from the peer_data_storage module. + * + * @param[in] p_event The event that has happened. + */ +typedef void (*pdb_evt_handler_t)(pdb_evt_t const * p_event); + + +/**@brief Function for registering for events from the peer database. + * + * @note This function will initialize the module if it is not already initialized. + * + * @param[in] evt_handler Event handler to register. + * + * @retval NRF_SUCCESS Registration successful. + * @retval NRF_ERROR_NO_MEM No more event handlers can be registered. + * @retval NRF_ERROR_NULL evt_handler was NULL. + * @retval NRF_ERROR_INVALID_PARAM Unexpected return code from @ref pm_buffer_init. + * @retval NRF_ERROR_INVALID_STATE FDS has not been initalized. + */ +ret_code_t pdb_register(pdb_evt_handler_t evt_handler); + + +/**@brief Function for allocating persistent bond storage for a peer. + * + * @return The ID of the newly allocated storage. + * @retval PM_PEER_ID_INVALID If no peer ID is available. + */ +pm_peer_id_t pdb_peer_allocate(void); + + +/**@brief Function for freeing a peer's persistent bond storage. + * + * @note This function will call @ref pdb_write_buf_release on the data for this peer. + * + * @param[in] peer_id ID to be freed. + * + * @retval NRF_SUCCESS Peer ID was released and clear operation was initiated successfully. + * @retval NRF_ERROR_BUSY Another peer_id clear was already requested or could not be started. + * @retval NRF_ERROR_INVALID_STATE Module is not initialized. + */ +ret_code_t pdb_peer_free(pm_peer_id_t peer_id); + + +/**@brief Function for retrieving pointers to read-only peer data. + * + * @note Reading this pointer is not safe in the strictest sense. If a safe read is required: + * - Disable interrupts + * - Call this function. If the return code is @ref NRF_SUCCESS, the following read is safe. + * - Read memory. + * - Enable interrupts. + * @note This buffer does not need to be released. It is a pointer directly to flash. + * + * @param[in] peer_id ID of peer to retrieve data for. + * @param[in] data_id Which piece of data to get. + * @param[out] p_peer_data Pointer to immutable peer data. + * @param[out] p_token Token that can be used to lock data in flash and check data validity. + * + * @retval NRF_SUCCESS Data retrieved successfully. + * @retval NRF_ERROR_INVALID_PARAM Data ID or Peer ID was invalid or unallocated. + * @retval NRF_ERROR_NULL p_peer_data was NULL. + * @retval NRF_ERROR_NOT_FOUND This data was not found for this peer ID. + * @retval NRF_ERROR_INVALID_STATE Module is not initialized. + */ +ret_code_t pdb_read_buf_get(pm_peer_id_t peer_id, + pm_peer_data_id_t data_id, + pm_peer_data_flash_t * p_peer_data, + pm_store_token_t * p_token); + + +/**@brief Function for retrieving pointers to a write buffer for peer data. + * + * @details This function will provide pointers to a buffer of the data. The data buffer will not be + * written to persistent storage until @ref pdb_write_buf_store is called. The buffer is + * released by calling either @ref pdb_write_buf_release, @ref pdb_write_buf_store, or + * @ref pdb_peer_free. + * + * When the data_id refers to a variable length data type, the available size is written + * to the data, both the top-level, and any internal length fields. + * + * @note Calling this function on a peer_id/data_id pair that already has a buffer created will + * give the same buffer, not create a new one. If n_bufs was increased since last time, the + * buffer might be relocated to be able to provide additional room. In this case, the data + * will be copied. If n_bufs was increased since last time, this function might return @ref + * NRF_ERROR_BUSY. In that case, the buffer is automatically released. + * + * @param[in] peer_id ID of peer to get a write buffer for. + * @param[in] data_id Which piece of data to get. + * @param[in] n_bufs The number of contiguous buffers needed. + * @param[out] p_peer_data Pointers to mutable peer data. + * + * @retval NRF_SUCCESS Data retrieved successfully. + * @retval NRF_ERROR_INVALID_PARAM Data ID or Peer ID was invalid or unallocated, or n_bufs was 0 + * or more than the total available buffers. + * @retval NRF_ERROR_NULL p_peer_data was NULL. + * @retval NRF_ERROR_BUSY Not enough buffer(s) available. + * @retval NRF_ERROR_INTERNAL Unexpected internal error. + * @retval NRF_ERROR_INVALID_STATE Module is not initialized. + */ +ret_code_t pdb_write_buf_get(pm_peer_id_t peer_id, + pm_peer_data_id_t data_id, + uint32_t n_bufs, + pm_peer_data_t * p_peer_data); + + +/**@brief Function for freeing a write buffer allocated with @ref pdb_write_buf_get. + * + * @note This function will not write peer data to persistent memory. Data in released buffer will + * be lost. + * + * @note This function will undo any previous call to @ref pdb_write_buf_store_prepare for this + * piece of data. + * + * @param[in] peer_id ID of peer to release buffer for. + * @param[in] data_id Which piece of data to release buffer for. + * + * @retval NRF_SUCCESS Successfully released buffer. + * @retval NRF_ERROR_NOT_FOUND No buffer was allocated for this peer ID/data ID pair. + * @retval NRF_ERROR_INVALID_STATE Module is not initialized. + * @retval NRF_ERROR_INTERNAL Unexpected internal error. + */ +ret_code_t pdb_write_buf_release(pm_peer_id_t peer_id, pm_peer_data_id_t data_id); + + +/**@brief Function for reserving space in persistent storage for data in a buffer. + * + * @note This function only works for data which has a write buffer allocated. If the write buffer + * is released, this prepare is undone. + * + * @note If space has already been reserved for this data, nothing is done. + * + * @param[in] peer_id The peer whose data to reserve space for. + * @param[in] data_id The type of data to reserve space for. + * + * @retval NRF_SUCCESS Successfully reserved space in persistent storage. + * @retval NRF_ERROR_NO_MEM Not enough room in persistent storage. + * @retval NRF_ERROR_BUSY Could not process request at this time. Reattempt later. + * @retval NRF_ERROR_NOT_FOUND No buffer has been allocated for this peer ID/data ID pair. + * @retval NRF_ERROR_INVALID_PARAM Data ID or Peer ID was invalid or unallocated. + * @retval NRF_ERROR_INVALID_STATE Module is not initialized. + */ +ret_code_t pdb_write_buf_store_prepare(pm_peer_id_t peer_id, pm_peer_data_id_t data_id); + + +/**@brief Function for writing data into persistent storage. Writing happens asynchronously. + * + * @note This will unlock the data after it has been written. + * + * @param[in] peer_id ID of peer to store data for. + * @param[in] data_id Which piece of data to store. + * + * @retval NRF_SUCCESS Data storing was successfully started. + * @retval NRF_ERROR_NO_MEM No space available in persistent storage. Please clear some + * space, the operation will be reattempted after the next compress + * procedure. This error will not happen if + * @ref pdb_write_buf_store_prepare is called beforehand. + * @retval NRF_ERROR_INVALID_PARAM Data ID was invalid. + * @retval NRF_ERROR_NOT_FOUND No buffer has been allocated for this peer ID/data ID pair. + * @retval NRF_ERROR_INVALID_STATE Module is not initialized. + * @retval NRF_ERROR_INTERNAL Unexpected internal error. + */ +ret_code_t pdb_write_buf_store(pm_peer_id_t peer_id, + pm_peer_data_id_t data_id); + + +/**@brief Function for clearing data from persistent storage. + * + * @param[in] peer_id ID of peer to clear data for. + * @param[in] data_id Which piece of data to clear. + * + * @retval NRF_SUCCESS Data clear was successfully started. + * @retval NRF_ERROR_INVALID_PARAM Data ID was invalid. + * @retval NRF_ERROR_NOT_FOUND Nothing to clear for this data for this peer ID. + * @retval NRF_ERROR_BUSY Could not process request at this time. Reattempt later. + * @retval NRF_ERROR_INVALID_STATE Module is not initialized. + */ +ret_code_t pdb_clear(pm_peer_id_t peer_id, pm_peer_data_id_t data_id); + + +/**@brief Function for querying the number of valid peer IDs available. I.E the number of peers + * in persistent storage. + * + * @return The number of valid peer IDs. + */ +uint32_t pdb_n_peers(void); + + +/**@brief Function for getting the next peer ID in the sequence of all used peer IDs. Can be + * used to loop through all used peer IDs. + * + * @note @ref PM_PEER_ID_INVALID is considered to be before the first and after the last ordinary + * peer ID. + * + * @param[in] prev_peer_id The previous peer ID. + * + * @return The next peer ID. + * @return The first ordinary peer ID if prev_peer_id was @ref PM_PEER_ID_INVALID. + * @retval PM_PEER_ID_INVALID if prev_peer_id was the last ordinary peer ID. + */ +pm_peer_id_t pdb_next_peer_id_get(pm_peer_id_t prev_peer_id); + + +/**@brief Function for updating currently stored peer data to a new version + * + * @details Updating happens asynchronously. + * Expect a @ref PDS_EVT_STORED or @ref PDS_EVT_ERROR_STORE for the store token + * and a @ref PDS_EVT_ERROR_CLEAR or @ref PDS_EVT_ERROR_CLEAR for the old token + * + * @param[in] peer_data New data + * @param[in] old_token Store token for the old data + * @param[out] p_store_token Store token for the new data + * + * @retval NRF_SUCESS The update was initiated successfully + * @retval NRF_ERROR_NOT_FOUND The old store token was invalid. + * @retval NRF_ERROR_NULL Data contained a NULL pointer. + * @retval NRF_ERROR_NO_MEM No space available in persistent storage. + * @retval NRF_ERROR_BUSY FDS or underlying modules are busy and can't take any + * more requests + * @retval NRF_ERROR_INVALID_STATE Module is not initialized. + */ +ret_code_t pdb_peer_data_update(pm_peer_data_const_t peer_data, + pm_store_token_t old_token, + pm_store_token_t * p_store_token); + + +/**@brief Function for reading data directly from persistent storage to external memory. + * + * @param[in] peer_id ID of peer to read data for. + * @param[in] data_id Which piece of data to read. + * @param[inout] p_peer_data Where to store the data. If the data to be read has variable length, + * the appropriate length field needs to reflect the available buffer + * space. On a successful read, the length field is updated to match the + * length of the read data. + * + * @retval NRF_SUCCESS Data successfully read. + * @retval NRF_ERROR_INVALID_PARAM Data ID or Peer ID was invalid or unallocated. + * @retval NRF_ERROR_NULL p_peer_data contained a NULL pointer. + * @retval NRF_ERROR_NOT_FOUND This data was not found for this peer ID. + * @retval NRF_ERROR_DATA_SIZE The provided buffer was not large enough. + * @retval NRF_ERROR_INVALID_STATE Module is not initialized. + */ +ret_code_t pdb_raw_read(pm_peer_id_t peer_id, + pm_peer_data_id_t data_id, + pm_peer_data_t * p_peer_data); + + +/**@brief Function for writing data directly to persistent storage from external memory. + * + * @param[in] peer_id ID of peer to write data for. + * @param[in] p_peer_data Data to store. + * @param[out] p_store_token A token identifying this particular store operation. The token can be + * used to identify events pertaining to this operation. + * + * @retval NRF_SUCCESS Data successfully written. + * @retval NRF_ERROR_INVALID_PARAM Data ID or Peer ID was invalid or unallocated. + * @retval NRF_ERROR_NULL p_peer_data contained a NULL pointer. + * @retval NRF_ERROR_NO_MEM No space available in persistent storage. + * @retval NRF_ERROR_INVALID_LENGTH Data length above the maximum allowed. + * @retval NRF_ERROR_INVALID_STATE Module is not initialized. + */ +ret_code_t pdb_raw_store(pm_peer_id_t peer_id, + pm_peer_data_const_t * p_peer_data, + pm_store_token_t * p_store_token); + + +/** @} */ + +#endif /* PEER_DATABASE_H__ */ + +