Nordic stack and drivers for the mbed BLE API
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Diff: TARGET_MCU_NRF51822/sdk/source/ble/peer_manager/peer_id.c
- Revision:
- 638:c90ae1400bf2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TARGET_MCU_NRF51822/sdk/source/ble/peer_manager/peer_id.c Wed Sep 14 14:39:43 2016 +0100 @@ -0,0 +1,131 @@ +/* + * 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. + * + */ + + +#include "peer_id.h" + +#include <stdint.h> +#include <string.h> +#include "sdk_errors.h" +#include "peer_manager_types.h" +#include "pm_mutex.h" + + +typedef struct +{ + uint8_t peer_ids[MUTEX_STORAGE_SIZE(PM_PEER_ID_N_AVAILABLE_IDS)]; /*< bitmap. */ +} pi_t; + + +static pi_t m_pi = {.peer_ids = {0}}; + + +static void internal_state_reset(pi_t * p_pi) +{ + memset(p_pi, 0, sizeof(pi_t)); +} + + +void peer_id_init(void) +{ + internal_state_reset(&m_pi); + pm_mutex_init(m_pi.peer_ids, PM_PEER_ID_N_AVAILABLE_IDS); +} + + +pm_peer_id_t peer_id_allocate(pm_peer_id_t peer_id) +{ + pm_peer_id_t allocated_peer_id = PM_PEER_ID_INVALID; + if (peer_id == PM_PEER_ID_INVALID) + { + allocated_peer_id = pm_mutex_lock_first_available(m_pi.peer_ids, PM_PEER_ID_N_AVAILABLE_IDS); + if (allocated_peer_id == PM_PEER_ID_N_AVAILABLE_IDS) + { + allocated_peer_id = PM_PEER_ID_INVALID; + } + } + else if (peer_id < PM_PEER_ID_N_AVAILABLE_IDS) + { + bool lock_success = pm_mutex_lock(m_pi.peer_ids, peer_id); + allocated_peer_id = lock_success ? peer_id : PM_PEER_ID_INVALID; + } + return allocated_peer_id; +} + + +void peer_id_free(pm_peer_id_t peer_id) +{ + if (peer_id < PM_PEER_ID_N_AVAILABLE_IDS) + { + pm_mutex_unlock(m_pi.peer_ids, peer_id); + } +} + + +bool peer_id_is_allocated(pm_peer_id_t peer_id) +{ + if (peer_id < PM_PEER_ID_N_AVAILABLE_IDS) + { + return pm_mutex_lock_status_get(m_pi.peer_ids, peer_id); + } + return false; +} + + +pm_peer_id_t peer_id_next_id_get(pm_peer_id_t prev_peer_id) +{ + pm_peer_id_t i = (prev_peer_id == PM_PEER_ID_INVALID) ? 0 : (prev_peer_id + 1); + for (; i < PM_PEER_ID_N_AVAILABLE_IDS; i++) + { + if (pm_mutex_lock_status_get(m_pi.peer_ids, i)) + { + return i; + } + } + + return PM_PEER_ID_INVALID; +} + + +uint32_t peer_id_n_ids(void) +{ + uint32_t n_ids = 0; + + for (pm_peer_id_t i = 0; i < PM_PEER_ID_N_AVAILABLE_IDS; i++) + { + n_ids += pm_mutex_lock_status_get(m_pi.peer_ids, i); + } + + return n_ids; +} + +