FreeRTOS软件定时器apollo中断状态判断

void WsfSetOsSpecificEvent(void)
{
  if(xRadioTaskEventObject != NULL) 
  {
      BaseType_t xHigherPriorityTaskWoken, xResult;
      if(xPortIsInsideInterrupt() == pdTRUE) {
          // Send an event to the main radio task
          xHigherPriorityTaskWoken = pdfALSE;
          xResult = xEventGroupSetBitsFromISR(xRadioTaskEventObject, 1,
                                              &xHigherPriorityTaskWoken);
          // If the radio task is higher-priority than the context we're currently
          // running from, we should yield now and run the radio task.
          //
          if ( xResult != pdFAIL )
          {
              portYIELD_FROM_ISR(xHigherPriorityTaskWoken);
          }    
      }
      else {
          xResult = xEventGroupSetBits(xRadioTaskEventObject, 1);
          //
          // If the radio task is higher priority than the context we're currently
          // running from, we should yield now and run the radio task.
          //
          if ( xResult != pdFAIL )
          {
              portYIELD();
          }
      }

  }    
}

static portFORCE_INLINE BaseType_t xPortIsInsideInterrupt( void )
{
uint32_t ulCurrentInterrupt;
BaseType_t xReturn;
	
	__asm
	{
		mrs ulCurrentInterrupt, ipsr
	}
	if( ulCurrentInterrupt == 0 )
	{
		xReturn = pdFALSE;
	}
	else
	{
		xReturn = pdTRUE;
	}
	return xReturn;
}