qemu/include/io
Daniel P. Berrangé dbb44504c2 io: add qio_task_wait_thread to join with a background thread
Add the ability for a caller to wait for completion of the
background thread to synchronously dispatch its result, without
needing to wait for the main loop to run the idle callback.

This method needs very careful usage to avoid a dangerous
race condition with the free'ing of the task. The completion
callback is normally invoked from an idle callback registered
with the main loop context. The qio_task_wait_thread method
must only be called if the completion callback has not yet
run. The only safe way to achieve this is to run the
qio_task_wait_thread method from the thread that executes
the main loop.

It is generally a bad idea to use this method since it will
block execution of the main loop, however, the design of
the character devices and its usage from vhostuser already
requires blocking execution.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20190211182442.8542-3-berrange@redhat.com>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
2019-02-12 17:35:56 +01:00
..
channel-buffer.h Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
channel-command.h Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
channel-file.h io: Fix QIOChannelFile when creating and opening read-write 2018-02-15 16:54:57 +00:00
channel-socket.h qio: non-default context for async conn 2018-03-06 10:19:06 +00:00
channel-tls.h io: return 0 for EOF in TLS session read after shutdown 2018-11-19 11:16:46 -06:00
channel-util.h Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
channel-watch.h Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
channel-websock.h io: get rid of bounce buffering in websock write path 2017-10-16 16:57:08 +01:00
channel.h io: return 0 for EOF in TLS session read after shutdown 2018-11-19 11:16:46 -06:00
dns-resolver.h Include less of the generated modular QAPI headers 2018-03-02 13:45:50 -06:00
net-listener.h qio: store gsources for net listeners 2018-03-06 10:19:05 +00:00
task.h io: add qio_task_wait_thread to join with a background thread 2019-02-12 17:35:56 +01:00