[lwip-devel] [bug #20021] conn->sem is only signaled one-way

[Simon Goldschmidt]

Follow-up Comment #19, bug #20021 (project lwip):

I've put together a patch that removes conn->sem and implements a better
closing mechanism calling an internal 'do_close_internal' function in
api_msg.c from do_close/do_delconn and releasing the blocked application only
when the connection is really closed. This removes unnecessary context
switches, the do_close_internal is called again from sent_tcp/poll_tcp until
the connection is really closed (application thread is then waked). err_tcp
for such a conn also wakes the application thread.

I'll apply it like that if noone objects ;-)

(file #13218)
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