[ILUG] Re: [linux-edu] war games?

[Mark Fallon]

Hi,

Another way goto's are used in the kernel to handle errors is 
when more than one resource is needed e.g:

int some_kernel_func(){
  if (get_res1() != 0){
    err = ERRRES1;
    goto err_exit;
  }
  if (get_res2() != 0){
    err = ERRRES2;
    goto err_exit_res1;
  }
  if (get_res3() != 0){
    err = ERRRES3;
    goto err_exit_res2;
  }


...

	Do something interesting (TM)


....

  err = SUCCESS;
  release_res3();

err_exit_res2:
  release_res2();

err_exit_res1:
  release_res1();

err_exit:
  return(err);
}


-- 
_______________________________________________________________

Mark Fallon			E-mail : Mark.Fallon at oracle.com
Senior Software Engineer	Phone  : +353-1-8033207
Global Product Engineering	Fax    : +353-1-8033221
_______________________________________________________________