_sioctl_psleep
if (!_sioctl_psleep(&hdl->sioctl, POLLOUT))
if (!_sioctl_psleep(&hdl->sioctl, 0))
if (!_sioctl_psleep(&hdl->sioctl, POLLOUT))
if (hdl->sioctl.nbio || !_sioctl_psleep(&hdl->sioctl, POLLOUT))
int _sioctl_psleep(struct sioctl_hdl *, int);