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97 lines
3.3 KiB
C
97 lines
3.3 KiB
C
/*
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* Copyright (c) 2019, Nordic Semiconductor ASA
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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
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* modification, 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 must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder 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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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef NRF_MUTEX_H__
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#define NRF_MUTEX_H__
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#include <nrfx.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @defgroup nrf_mutex_hal MUTEX HAL
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* @{
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* @ingroup nrf_mutex
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* @brief Hardware access layer for managing the MUTEX peripheral.
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*/
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/**
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* @brief Function for locking the specified mutex.
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*
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* If the specified mutex is already locked, its state remains unchanged.
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*
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* @note Faults are not managed by the MUTEX peripheral.
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* One consequence is that if a mutex is locked and a fault happens,
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* it is the responsibility of the fault handler to release the mutex.
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* If a fault handler is not managing the mutex release, the mutex will remain locked.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] mutex Index of the mutex to be locked.
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*
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* @retval true Mutex is successfully locked.
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* @retval false Mutex was already locked.
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*/
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NRF_STATIC_INLINE bool nrf_mutex_lock(NRF_MUTEX_Type * p_reg, uint8_t mutex);
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/**
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* @brief Function for unlocking the specified mutex.
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*
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* If the specified mutex is already unlocked, its state remains unchanged.
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*
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* @param[in] p_reg Pointer to the structure of registers of the peripheral.
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* @param[in] mutex Index of the mutex to be locked.
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*/
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NRF_STATIC_INLINE void nrf_mutex_unlock(NRF_MUTEX_Type * p_reg, uint8_t mutex);
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#ifndef NRF_DECLARE_ONLY
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NRF_STATIC_INLINE bool nrf_mutex_lock(NRF_MUTEX_Type * p_reg, uint8_t mutex)
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{
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return (p_reg->MUTEX[mutex] == MUTEX_MUTEX_MUTEX_Unlocked);
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}
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NRF_STATIC_INLINE void nrf_mutex_unlock(NRF_MUTEX_Type * p_reg, uint8_t mutex)
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{
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p_reg->MUTEX[mutex] = MUTEX_MUTEX_MUTEX_Unlocked;
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}
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#endif // NRF_DECLARE_ONLY
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/** @} */
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#ifdef __cplusplus
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}
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#endif
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#endif // NRF_MUTEX_H__
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