Neil Booth c64e0c0e64 Send requests only from the interface thread. ...

Currently requests are sent from the requestor's thread.  The lock is
not properly held where necessary so this is not thread-safe.  For example
it can race with the thread stopping and closing the socket the
requestor is trying to use to send with.

Resolve such races by having send_request() simply queue the requests,
which are asynchronously sent from the interface thread itself.

2015-05-05 21:36:34 +09:00

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