Boost::Asio : io_service.run() vs poll() or how do I integrate boost::asio in mainloop

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Using io_service::poll instead of io_service::run is perfectly acceptable. The difference is explained in the documentation

The poll() function may also be used
to dispatch ready handlers, but
without blocking.

Note that io_service::run will block if there’s any work left in the queue

The work class is used to inform the
io_service when work starts and
finishes. This ensures that the
io_service object’s run() function
will not exit while work is underway,
and that it does exit when there is no
unfinished work remaining.

whereas io_service::poll does not exhibit this behavior, it just invokes ready handlers. Also note that you will need to invoke io_service::reset on any subsequent invocation to io_service:run or io_service::poll.

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