The application’s receipt of notification events depends on the CS_ASYNC_NOTIFS property and the network I/O methods supported by the client platform.
The CS_ASYNC_NOTIFS property determines whether a connection receives notifications asynchronously. See “Asynchronous notifications”.
When the connection to the Open Server has little or no activity other than notifications, asynchronous notifications should be enabled by setting the CS_ASYNC_NOTIFS property to CS_TRUE. This property defaults to CS_FALSE, which means that the application must be interacting with the server over the connection (to cause Client-Library to read from the network) to receive a registered procedure notification.
If a connection is used only to receive registered procedure
notifications, asynchronous notifications must be enabled for a
connection even if the connection is polled. On an otherwise idle
connection, ct_poll does
not trigger the notification callback unless the CS_ASYNC_NOTIFS property
is CS_TRUE.
The default setting is CS_FALSE.
