DAT_EVD_SET_UNWAITABLE(3DAT) Direct Access Transport Library Functions DAT_EVD_SET_UNWAITABLE(3DAT)

dat_evd_set_unwaitable - transition the Event Dispatcher into an unwaitable state

cc [ flag... ] file... -ldat [ library... ]
#include <dat/udat.h>

IN DAT_EVD_HANDLE evd_handle


Handle for an instance of Event Dispatcher.

The dat_evd_set_unwaitable() transitions the Event Dispatcher into an unwaitable state. In this state, calls to dat_evd_wait(3DAT) return synchronously with a DAT_INVALID_STATE error, and threads already blocked in dat_evd_wait() are awakened and return with a DAT_INVALID_STATE error without any further action by the Consumer. The actual state of the Event Dispatcher is accessible through dat_evd_query(3DAT) and is DAT_EVD_UNWAITABLE after the return of this operation.

This call does not affect a CNO associated with this EVD at all. Events arriving on the EVD after it is set unwaitable still trigger the CNO (if appropriate), and can be retrieved with dat_evd_dequeue(3DAT). Because events can arrive normally on the EVD, the EVD might overflow; the Consumer is expected to protect against this possibility.


The operation was successful.


The evd_handle parameter is invalid.

See attributes(7) for descriptions of the following attributes:

Interface Stability Standard: uDAPL, 1.1, 1.2
MT-Level Safe

dat_evd_clear_unwaitable(3DAT), dat_evd_dequeue(3DAT), dat_evd_query(3DAT), dat_evd_wait(3DAT), libdat(3LIB), attributes(7)

July 16, 2004 OmniOS