CancelAsyncFcn - Callback function file to execute when asynchronous operation is canceled

Description

You configure CancelAsyncFcn to execute a callback function file when a cancel async event occurs. A cancel async event occurs after an asynchronous read or write operation is canceled.

When a cancel async event occurs, the function specified in CancelAsyncFcn is passed two parameters: Obj and EventInfo. Obj is the object associated with the event, and EventInfo is an event structure containing the fields Type and Data. The Type field is set to 'CancelAsync'. The Data field contains a structure with the fields shown below.

Field Name	Description
LocalEventTime	The time, as a MATLAB date vector, that the event occurred.
TransID	The transaction ID of the canceled read or write asynchronous operation.
GroupName	The group name.

Cancel async event information is stored in the EventLog property.

Characteristics

Access	Read/write
Applies to	dagroup
Data type	String, function handle, or cell array
Values	The default value is @opccallback.

See Also

Functions

cancelasync, opccallback, readasync, writeasync

Properties

EventLog

© 1984-2012- The MathWorks, Inc.    -   Site Help   -   Patents   -   Trademarks   -   Privacy Policy   -   Preventing Piracy   -   RSS