Esempi in C++ (Cpp) per gnttab_expand

Esempio n. 1

File: gnttab.c Progetto: xf739645524/kernel-rhel5

static int get_free_entries(int count)
{
	unsigned long flags;
	int ref, rc;
	grant_ref_t head;

	spin_lock_irqsave(&gnttab_list_lock, flags);

	if ((gnttab_free_count < count) &&
	    ((rc = gnttab_expand(count - gnttab_free_count)) < 0)) {
		spin_unlock_irqrestore(&gnttab_list_lock, flags);
		return rc;
	}

	ref = head = gnttab_free_head;
	gnttab_free_count -= count;
	while (count-- > 1)
		head = gnttab_entry(head);
 	gnttab_free_head = gnttab_entry(head);
	gnttab_entry(head) = GNTTAB_LIST_END;

	spin_unlock_irqrestore(&gnttab_list_lock, flags);

	return ref;
}

Esempio n. 2

File: grant_table.c Progetto: 2asoft/freebsd

static int
get_free_entries(int count, int *entries)
{
	int ref, error;
	grant_ref_t head;

	mtx_lock(&gnttab_list_lock);
	if ((gnttab_free_count < count) &&
	    ((error = gnttab_expand(count - gnttab_free_count)) != 0)) {
		mtx_unlock(&gnttab_list_lock);
		return (error);
	}
	ref = head = gnttab_free_head;
	gnttab_free_count -= count;
	while (count-- > 1)
		head = gnttab_entry(head);
	gnttab_free_head = gnttab_entry(head);
	gnttab_entry(head) = GNTTAB_LIST_END;
	mtx_unlock(&gnttab_list_lock);

	*entries = ref;
	return (0);
}