Проект OpenNet: MAN dat_evd_set_unwaitable (3) Библиотечные вызовы (FreeBSD и Linux)

Интерактивная система просмотра системных руководств (man-ов)

dat_evd_set_unwaitable (3)

>> dat_evd_set_unwaitable (3) ( Solaris man: Библиотечные вызовы )

NAME

dat_evd_set_unwaitable - transition the Event Dispatcher into an unwaitable state

SYNOPSIS

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

DAT_RETURN
   dat_evd_set_unwaitable(
   IN    DAT_EVD_HANDLE    evd_handle
   )

PARAMETERS

evd_handle

: Handle for an instance of Event Dispatcher.

DESCRIPTION

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.