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BSA asyn driver (bsaAsynDriver.cpp/h)

BSA asyn driver also contains a global static pointer that points to a linkedList of all drivers instantiated, and contains the same set of linkedList functions that were described above. The node structure is as follows

typedef struct {
    ELLNODE       node;
    char          *named_root;
    char          *port;
    bsaAsynDriver *pBsaDrv;
    ELLLIST       *pBsaEllList;
    void          *_pBsaBridge;
} pDrvList_t;

The functions operating on the linked list are as follows:

• init_drvList
  • Returns an allocated global linked list pointer. This does not necessarily mean that the linked l has elements.
  • Flow: If the global pointer is not NULL, a new linked list (type ELLLIST) is allocated, otherwise do nothing. 
• prep_drvAnonimous:
  • Returns an allocated but empty driver pointer that needs to be initialized
  • Calls init_drvList, then allocates memory for a new item in the linked list, initializes it, then adds it to the end of the linked list and returns linked list count.
• prep_drvByPort
  • Same as prep_drvAnonimous; create new driver item of linked list but with a specific port name string
• prep_drvByNamedRoot: 
  • Same as prep_drvAnonimous; create new driver item of linked list but with a specific named root string
• find_drvLast:
  • Returns the last driver found. If not driver is found in the linked list, NULL is returned
  • Calls init_drvList, then counts the number of elements in the linked list. If they are not 0, it returns the last element, otherwise returns NULL
• find_drvByPort:
  • Returns a driver that matches the same port name. If not found, returns NULL
  • Calls init_drvList, then iterates on the linked list one element at a time starting from the first element. Once an element with a portName that is not NULL, and a string length of not zero, and a string identical to the argument port_name is found, it is returned, otherwise the next item is examined. If none is found, NULL is returned
• find_drvByNamedRoot