hal_set_lock, hal_get_lock - Set or get the HAL lock level

lock_type
              The  desired  lock  type,  which  may be a bitwise combination of: HAL_LOCK_LOAD, HAL_LOCK_CONFIG,
              HAL_LOCK_PARAMS, or HAL_LOCK_PARAMS.  HAL_LOCK_NONE or 0 locks  nothing,  and  HAL_LOCK_ALLlockseverything.

       hal_set_lock, hal_get_lock - Set or get the HAL lock level

hal_set_lock  Returns a HAL status code.  hal_get_lock returns the current HAL lock level or a HAL status
       code.

LinuxCNC Documentation                             2006-10-12                                 hal_set_lock(3hal)

       int hal_set_lock(unsigned char lock_type)

       int hal_get_lock()