Posting a onStopRequestEvent to the event loop

[Rick Marvin]

My event loop which is performing the download resides in a child thread.
In some cases, after invoking a call to nsIChannel::asyncRead, I have a need
to stop the download of a url prior to it completing.   I am uncertain how
to get at a nsOnStopRequestEvent and post it to the eventqueue on my child
thread.  I only have access to the channel, my receiver (inherits from
nsIStreamListener), and my URLLoadInfo.  Any suggestions on how to cleanly
stop the download?

Kind Regards,

Rick Marvin