65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
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/**
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* MIT License
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*
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* Copyright (c) 2018 Infineon Technologies AG
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE
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*
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*
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* \file pal_os_lock.c
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*
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* \brief This file implements the platform abstraction layer APIs for os locks (e.g. semaphore).
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*
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* \addtogroup grPAL
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* @{
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*/
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#include "optiga/pal/pal_os_lock.h"
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#include "nrf_atomic.h"
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#include "nrf_pwr_mgmt.h"
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/**
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* @brief PAL OS lock structure. Might be extended if needed
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*/
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typedef struct pal_os_lock
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{
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nrf_atomic_flag_t lock;
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} pal_os_lock_t;
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static volatile pal_os_lock_t pal_os_lock = {.lock = 0};
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pal_status_t pal_os_lock_acquire(void)
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{
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// wait until previous value was false, this indicates the lock was free and we own it now.
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while(nrf_atomic_flag_set_fetch(&pal_os_lock.lock)) {
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nrf_pwr_mgmt_run();
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}
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return PAL_STATUS_SUCCESS;
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}
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void pal_os_lock_release(void)
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{
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(void)nrf_atomic_flag_clear(&pal_os_lock.lock);
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}
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/**
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* @}
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*/
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