mirror of
https://github.com/jam422470459/EPD-nRF52-hema213.git
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146 lines
4.1 KiB
C
146 lines
4.1 KiB
C
/**
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* Copyright (c) 2015 - 2017, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "sdk_common.h"
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#if NRF_MODULE_ENABLED(PEER_MANAGER)
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#include "pm_mutex.h"
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#include <stdbool.h>
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#include <string.h>
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#include "nrf_error.h"
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#include "app_util_platform.h"
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/**@brief Locks the mutex defined by the mask.
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*
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* @param p_mutex pointer to the mutex storage.
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* @param mutex_mask the mask identifying the mutex position.
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*
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* @retval true if the mutex could be locked.
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* @retval false if the mutex was already locked.
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*/
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static bool lock_by_mask(uint8_t * p_mutex, uint8_t mutex_mask)
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{
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bool success = false;
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if ( (*p_mutex & mutex_mask) == 0 )
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{
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CRITICAL_REGION_ENTER();
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if ( (*p_mutex & mutex_mask) == 0 )
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{
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*p_mutex |= mutex_mask;
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success = true;
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}
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CRITICAL_REGION_EXIT();
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}
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return ( success );
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}
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void pm_mutex_init(uint8_t * p_mutex, uint16_t mutex_size)
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{
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if (p_mutex != NULL)
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{
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memset(&p_mutex[0], 0, MUTEX_STORAGE_SIZE(mutex_size));
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}
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}
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bool pm_mutex_lock(uint8_t * p_mutex, uint16_t mutex_id)
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{
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if (p_mutex != NULL)
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{
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return ( lock_by_mask(&(p_mutex[mutex_id >> 3]), (1 << (mutex_id & 0x07))) );
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}
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else
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{
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return false;
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}
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}
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void pm_mutex_unlock(uint8_t * p_mutex, uint16_t mutex_id)
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{
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uint8_t mutex_base = mutex_id >> 3;
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uint8_t mutex_mask = (1 << (mutex_id & 0x07));
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if ((p_mutex != NULL)
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&& (p_mutex[mutex_base] & mutex_mask))
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{
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CRITICAL_REGION_ENTER();
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p_mutex[mutex_base] &= ~mutex_mask;
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CRITICAL_REGION_EXIT();
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}
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}
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uint16_t pm_mutex_lock_first_available(uint8_t * p_mutex, uint16_t mutex_size)
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{
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if (p_mutex != NULL)
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{
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for ( uint16_t i = 0; i < mutex_size; i++ )
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{
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if ( lock_by_mask(&(p_mutex[i >> 3]), 1 << (i & 0x07)) )
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{
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return ( i );
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}
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}
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}
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return ( mutex_size );
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}
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bool pm_mutex_lock_status_get(uint8_t * p_mutex, uint16_t mutex_id)
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{
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if (p_mutex != NULL)
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{
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return ( (p_mutex[mutex_id >> 3] & (1 << (mutex_id & 0x07))) );
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}
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else
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{
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return true;
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}
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}
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#endif // NRF_MODULE_ENABLED(PEER_MANAGER)
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