diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/peer_manager/pm_buffer.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/peer_manager/pm_buffer.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/peer_manager/pm_buffer.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/peer_manager/pm_buffer.c new file mode 100644 index 0000000..4fdbb34 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/peer_manager/pm_buffer.c @@ -0,0 +1,151 @@ +/** + * Copyright (c) 2015 - 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. + * + */ +#include "sdk_common.h" +#if NRF_MODULE_ENABLED(PEER_MANAGER) +#include "pm_buffer.h" + +#include <stdbool.h> +#include <string.h> +#include "nrf_error.h" +#include "pm_mutex.h" + + +#define BUFFER_IS_VALID(p_buffer) ((p_buffer != NULL) \ + && (p_buffer->p_memory != NULL) \ + && (p_buffer->p_mutex != NULL)) + + + +ret_code_t pm_buffer_init(pm_buffer_t * p_buffer, + uint8_t * p_buffer_memory, + uint32_t buffer_memory_size, + uint8_t * p_mutex_memory, + uint32_t mutex_memory_size, + uint32_t n_blocks, + uint32_t block_size) +{ + if ( (p_buffer != NULL) + && (p_buffer_memory != NULL) + && (p_mutex_memory != NULL) + && (buffer_memory_size >= (n_blocks * block_size)) + && (mutex_memory_size >= MUTEX_STORAGE_SIZE(n_blocks)) + && (n_blocks != 0) + && (block_size != 0)) + { + p_buffer->p_memory = p_buffer_memory; + p_buffer->p_mutex = p_mutex_memory; + p_buffer->n_blocks = n_blocks; + p_buffer->block_size = block_size; + pm_mutex_init(p_buffer->p_mutex, n_blocks); + + return NRF_SUCCESS; + } + else + { + return NRF_ERROR_INVALID_PARAM; + } +} + + +uint8_t pm_buffer_block_acquire(pm_buffer_t * p_buffer, uint32_t n_blocks) +{ + if (!BUFFER_IS_VALID(p_buffer)) + { + return ( PM_BUFFER_INVALID_ID ); + } + + uint8_t first_locked_mutex = PM_BUFFER_INVALID_ID; + + for (uint8_t i = 0; i < p_buffer->n_blocks; i++) + { + if (pm_mutex_lock(p_buffer->p_mutex, i)) + { + if (first_locked_mutex == PM_BUFFER_INVALID_ID) + { + first_locked_mutex = i; + } + if ((i - first_locked_mutex + 1) == n_blocks) + { + return first_locked_mutex; + } + } + else if (first_locked_mutex != PM_BUFFER_INVALID_ID) + { + for (uint8_t j = first_locked_mutex; j < i; j++) + { + pm_buffer_release(p_buffer, j); + } + first_locked_mutex = PM_BUFFER_INVALID_ID; + } + } + + return ( PM_BUFFER_INVALID_ID ); +} + + +uint8_t * pm_buffer_ptr_get(pm_buffer_t * p_buffer, uint8_t id) +{ + if (!BUFFER_IS_VALID(p_buffer)) + { + return ( NULL ); + } + + if ( (id != PM_BUFFER_INVALID_ID) + && pm_mutex_lock_status_get(p_buffer->p_mutex, id) ) + { + return ( &p_buffer->p_memory[id * p_buffer->block_size] ); + } + else + { + return ( NULL ); + } +} + + +void pm_buffer_release(pm_buffer_t * p_buffer, uint8_t id) +{ + if ( BUFFER_IS_VALID(p_buffer) + && (id != PM_BUFFER_INVALID_ID) + && pm_mutex_lock_status_get(p_buffer->p_mutex, id)) + { + pm_mutex_unlock(p_buffer->p_mutex, id); + } +} +#endif // NRF_MODULE_ENABLED(PEER_MANAGER) |