Function pointer

FORMAT:

int realFunc(<params>) { return 0; }

int (*funcName)(<params>);

funcName = realFunc; 

EXAMPLES:

int lbkStubFunc(int port, int mode) { return 0; }

int (*drv_eth_port_set_loopback)(int port, int mode) = lbkStubFunc;

or

drv_eth_port_set_loopback = lbkStubFunc;

FORMAT using typedef: 

Int stub(<API interface>) { return 0; }

typedef int (*FUNCPTR) (<API interface>);

FUNCPTR tmp;

tmp = (FUNCPTR) stub;