Canceling Async Operations

Thread View: comp.os.os2.programmer

1 messages

[T] Back to Threads [V] Tree View [G] Group Articles

1 total messages Started by Kenneth Porter Thu, 29 Nov 1990 05:58

#1683

Author: Kenneth Porter
Date: Thu, 29 Nov 1990 05:58

21 lines
1342 bytes

How do I cancel a DosReadAsync()?  Do I have to close the
handle, or is there an easier way?  I want to get the
equivalent effect of the Unix select() call, in which I can
block waiting on either characters available or a timeout.  The
only way I can see to do this is to use DosReadAsync and
DosSemWait, and kill the async thread by closing the device out
from under it.  This is klugy because I have to make the device
name and settings available to the wait-for-character code so
that I can re-open and configure the device.
 
The application will initially use a serial port, so perhaps
the timeout stuff in the DCBINFO can be used, but I need to
change the timeout dynamically, as different timeouts apply
during different phases of the transmission.  Just how does the
timeout stuff in DCBINFO work?
 
I would like to eventually use arbitrary devices so a
device-independent solution is preferable.
 
Ken (shiva@well.sf.ca.us)

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads