C++ (Cpp) wtd_set_action Exemples

Exemple #1

int skb_kvec_recv_datagram(struct sock * sk, kvec_cb_t cb, int len,
	void (*finish)(struct sock *sk, kvec_cb_t cb, int len, struct sk_buff *skb))
{
	struct skb_async_info *info = kmalloc(sizeof(struct skb_async_info), GFP_KERNEL);
	if (info) {
		wtd_set_action(&info->wtd, skb_async_read_worker, info);
		info->sk = sk;
		info->len = len;
		info->finish = finish;
		info->cb = cb;
		skb_async_read_worker(info);
		return 0;
	}
	return -EAGAIN;
}

Exemple #2

int async_poll(struct kiocb *iocb, int events)
{
	unsigned int mask;
	async_poll_table *pasync;
	poll_table *p;

	/* Fast path */
	if (iocb->filp->f_op && iocb->filp->f_op->poll) {
		mask = iocb->filp->f_op->poll(iocb->filp, NULL);
		mask &= events | POLLERR | POLLHUP;
		if (mask & events)
			return mask;
	}

	pasync = kmem_cache_alloc(async_poll_table_cache, SLAB_KERNEL);
	if (!pasync)
		return -ENOMEM;

	p = (poll_table *)pasync;
	poll_initwait(p);
	wtd_set_action(&pasync->wtd, async_poll_complete, pasync);
	p->iocb = iocb;
	pasync->wake = 0;
	pasync->sync = 0;
	pasync->events = events;
	pasync->pt_page.entry = pasync->pt_page.entries;
	pasync->pt_page.size = sizeof(pasync->pt_page);
	p->table = &pasync->pt_page;

	iocb->data = p;
	iocb->users ++;
	wmb();

	mask = DEFAULT_POLLMASK;
	if (iocb->filp->f_op && iocb->filp->f_op->poll)
		mask = iocb->filp->f_op->poll(iocb->filp, p);
	mask &= events | POLLERR | POLLHUP;
	if (mask && xchg(&iocb->data, NULL)) {
		poll_freewait(p);
		aio_complete(iocb, mask, 0);
	}

	iocb->cancel = async_poll_cancel;
	aio_put_req(iocb);
	return 0;
}