SSL_POLL_EVENT_ISU
if ((item->revents & SSL_POLL_EVENT_ISB) || (item->revents & SSL_POLL_EVENT_ISU)) {
if (item->revents & SSL_POLL_EVENT_ISU)
processed_event = processed_event | SSL_POLL_EVENT_ISU;
#define SSL_POLL_EVENT_IS (SSL_POLL_EVENT_ISB | SSL_POLL_EVENT_ISU)
if ((events & SSL_POLL_EVENT_ISU) != 0
revents |= SSL_POLL_EVENT_ISU;