Function fdset_del

dpdk/lib/vhost/fd_man.c:146–171

* Unregister the fd from the fdset. * Returns context of a given fd or NULL. */

 *  Returns context of a given fd or NULL.
 */
void *
fdset_del(struct fdset *pfdset, int fd)
{
	int i;
	void *dat = NULL;

	if (pfdset == NULL || fd == -1)
		return NULL;

	do {
		pthread_mutex_lock(&pfdset->fd_mutex);

		i = fdset_find_fd(pfdset, fd);
		if (i != -1 && pfdset->fd[i].busy == 0) {
			/* busy indicates r/wcb is executing! */
			dat = pfdset->fd[i].dat;
			pfdset->fd[i].fd = -1;
			pfdset->fd[i].rcb = pfdset->fd[i].wcb = NULL;
			pfdset->fd[i].dat = NULL;
			i = -1;
		}
		pthread_mutex_unlock(&pfdset->fd_mutex);
	} while (i != -1);

	return dat;
}

/**
 *  Unregister the fd from the fdset.