On Sunday 18 July 2004 15:25, Heap Ho Tan wrote:
> Hi,
> I have the following code:
> I wanted to access the queue in the struct eventDest
> after adding it into a list. However, I just can't do
> it using this line of piece, how would I do it
> actually:
> tmp_2 = list_entry(tmp, struct eventDest, queue);
> **************************************
> LIST_HEAD(event_list);
>
> struct eventDest{
> //Single lock for the whole data-structure
> spinlock_t eventLock;
> int eventID;
> //declare a task list
> int nb_process;
> wait_queue_head_t queue;
// if you are going to do a list_add() you'll
// need a struct list_head
struct list_head list;
> };
>
> struct eventDest *event;
>
> event=(struct eventDest *)kmalloc(sizeof(*event));
>
> list_add( &event_list, event);
// replace with
list_add(&event->list, &event_list);
>
> list_for_each( tmp, &event_list){
> id = list_entry(tmp, struct eventDest, eventID);
// You are using list_entry() wrong, try this..
struct eventDest *e, *e2;
e = list_entry(tmp, struct eventDest, queue);
id = e->eventID;
> if( id == tmpID ){
> tmp_2 = list_entry(tmp, struct eventDest, queue);
// try this
e2 = list_entry(tmp, struct eventDest, list);
tmp_2 = e->queue;
> sleep_on(tmp_2);
> }
> printk("%d\n", id);
> }
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