User`s guide

3: BSC 3270 DLI Functions
DC 900-1340I 49
ware interrupt level in the completion handler established by the dlInit or dlOpen func-
tion, or by periodic use of
dlPoll to query the I/O completion status.
The asyncIO DLI configuration parameter specifies whether an application session uses
blocking or non-blocking I/O. The
alwaysQIO DLI configuration parameter further
qualifies the operation of non-blocking I/O activity. Refer to the Freeway Data Link
Interface Reference Guide for more information.
The effects on different DLI functions, resulting from the choice of blocking or non-
blocking I/O, are explained in the Freeway Data Link Interface Reference Guide and
throughout this chapter as they relate to BSC 3270.
3.1.4 Buffer Management
Currently the interrelated Freeway, DLI, TSI and ICP buffers default to a size of 1024
bytes.
Caution
If you need to change a buffer size for your application, refer to the
Freeway Data Link Interface Reference Guide for explanations of the
complexities that you must consider.