text: /**
   * Copyright (c) 2016 - 2019, 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 <stdlib.h>
  #include "nrf_soc.h"
  #include "nrf_error.h"
  
  static uint8_t m_in_critical_region = 0;
  
  uint32_t sd_nvic_EnableIRQ(IRQn_Type IRQn)
  {
      NVIC_EnableIRQ(IRQn);
      return NRF_SUCCESS;
  }
  
  uint32_t sd_nvic_DisableIRQ(IRQn_Type IRQn)
  {
      NVIC_DisableIRQ(IRQn);
      return NRF_SUCCESS;
  }
  
  uint32_t sd_nvic_GetPendingIRQ(IRQn_Type IRQn, uint32_t * p_pending_irq)
  {
      if (p_pending_irq != NULL)
      {
          *p_pending_irq = NVIC_GetPendingIRQ(IRQn);
          return NRF_SUCCESS;
      }
      return NRF_ERROR_NULL;
  }
  
  uint32_t sd_nvic_SetPendingIRQ(IRQn_Type IRQn)
  {
      NVIC_SetPendingIRQ(IRQn);
      return NRF_SUCCESS;
  }
  
  uint32_t sd_nvic_ClearPendingIRQ(IRQn_Type IRQn)
  {
      NVIC_ClearPendingIRQ(IRQn);
      return NRF_SUCCESS;
  }
  
  uint32_t sd_nvic_SetPriority(IRQn_Type IRQn, uint32_t priority)
  {
      NVIC_SetPriority(IRQn, priority);
      return NRF_SUCCESS;
  }
  
  uint32_t sd_nvic_GetPriority(IRQn_Type IRQn, uint32_t * p_priority)
  {
      if (p_priority != NULL)
      {
          *p_priority = NVIC_GetPriority(IRQn);
          return NRF_SUCCESS;
      }
  
      return NRF_ERROR_NULL;
  }
  
  uint32_t sd_nvic_SystemReset(void)
  {
      NVIC_SystemReset();
      return NRF_SUCCESS;
  }
  
  uint32_t sd_nvic_critical_region_enter(uint8_t * p_is_nested_critical_region)
  {
      __disable_irq();
  
      *p_is_nested_critical_region = (m_in_critical_region != 0);
      m_in_critical_region++;
  
      return NRF_SUCCESS;
  }
  
  uint32_t sd_nvic_critical_region_exit(uint8_t is_nested_critical_region)
  {
      m_in_critical_region--;
  
      if (is_nested_critical_region == 0)
      {
          m_in_critical_region = 0;
          __enable_irq();
      }
      return NRF_SUCCESS;
  }
  